Seattle — flights from Baltimore to Seattle

Flight Deals from Baltimore to Seattle from $230

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Good to Know

Essential information to help you plan your flight from Baltimore to Seattle.

Timing Your Trip

The best day, time of day, season and booking window for this route.

Price Drop Deals

Express Deal
Southwest AirlinesSouthwest Airlinesfound Oct 14
11/18/26
5:50 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
8h 45mMDWChicago Midway Airport
11/18/26
11:35 pm
SEASeattle Tacoma International Airport
11/25/26
8:40 pm
SEASeattle Tacoma International Airport
12h 35mDENDenver International Airport
11/26/26
12:15 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$338
Southwest AirlinesSouthwest Airlinesfound Oct 14
11/18/26
12:10 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
9h 25mAUSAustin Bergstrom International Airport
11/18/26
6:35 pm
SEASeattle Tacoma International Airport
11/25/26
8:40 pm
SEASeattle Tacoma International Airport
12h 35mDENDenver International Airport
11/26/26
12:15 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$338
Southwest AirlinesSouthwest Airlinesfound Oct 14
11/18/26
2:55 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
10h 25mLASHarry Reid International Airport
11/18/26
10:20 pm
SEASeattle Tacoma International Airport
11/25/26
8:40 pm
SEASeattle Tacoma International Airport
12h 35mDENDenver International Airport
11/26/26
12:15 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$338
Southwest AirlinesSouthwest Airlinesfound Oct 14
11/18/26
10:50 am
BWIBaltimore/Washington International Thurgood Marshall Airport
10h 50mSMFSacramento International Airport
11/18/26
6:40 pm
SEASeattle Tacoma International Airport
11/25/26
8:40 pm
SEASeattle Tacoma International Airport
12h 35mDENDenver International Airport
11/26/26
12:15 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$338
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Alaska AirlinesAlaska Airlinesfound Oct 12
11/10/26
7:02 am
BWIBaltimore/Washington International Thurgood Marshall Airport
5h 54m
11/10/26
9:56 am
SEASeattle Tacoma International Airport
11/17/26
9:08 am
SEASeattle Tacoma International Airport
5h 4m
11/17/26
5:12 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$393
American AirlinesAmerican Airlinesfound Oct 14
11/18/26
5:12 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
8h 22mCLTCharlotte Douglas International Airport
11/18/26
10:34 pm
SEASeattle Tacoma International Airport
11/25/26
11:59 pm
SEASeattle Tacoma International Airport
9h 38mCLTCharlotte Douglas International Airport
11/26/26
12:37 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$396
Southwest AirlinesSouthwest Airlinesfound Oct 14
11/18/26
11:55 am
BWIBaltimore/Washington International Thurgood Marshall Airport
12h 0mSANSan Diego International Airport
11/18/26
8:55 pm
SEASeattle Tacoma International Airport
11/25/26
8:40 pm
SEASeattle Tacoma International Airport
12h 35mDENDenver International Airport
11/26/26
12:15 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$338
American AirlinesAmerican Airlinesfound Oct 14
11/18/26
5:45 am
BWIBaltimore/Washington International Thurgood Marshall Airport
8h 52mCLTCharlotte Douglas International Airport
11/18/26
11:37 am
SEASeattle Tacoma International Airport
11/25/26
11:59 pm
SEASeattle Tacoma International Airport
9h 38mCLTCharlotte Douglas International Airport
11/26/26
12:37 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$396
Southwest AirlinesSouthwest Airlinesfound Oct 14
11/18/26
8:05 am
BWIBaltimore/Washington International Thurgood Marshall Airport
12h 45mDENDenver International Airport
11/18/26
5:50 pm
SEASeattle Tacoma International Airport
11/25/26
8:40 pm
SEASeattle Tacoma International Airport
12h 35mDENDenver International Airport
11/26/26
12:15 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$338
American AirlinesAmerican Airlinesfound Oct 14
11/18/26
6:27 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
9h 8mORDChicago O Hare Airport
11/19/26
12:35 am
SEASeattle Tacoma International Airport
11/25/26
11:59 pm
SEASeattle Tacoma International Airport
9h 38mCLTCharlotte Douglas International Airport
11/26/26
12:37 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
$396

Top Deals on flights from Baltimore to Seattle

Baltimore, US (BWI) - Seattle, US (SEA)

Alaska AirlinesAlaska Airlines

Nov 1

7:02 am
BWIBaltimore/Washington International Thurgood Marshall Airport
5h 54mNonstop

Nov 1

9:56 am
SEASeattle Tacoma International Airport
Search More

as low as

$230

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

7:05 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
8h 35m1 stop · MDW

Nov 2

12:40 am
SEASeattle Tacoma International Airport
Search More

as low as

$235

Baltimore, US (BWI) - Seattle, US (SEA)

American AirlinesAmerican Airlines

Nov 1

5:00 am
BWIBaltimore/Washington International Thurgood Marshall Airport
8h 3m1 stop · CLT

Nov 1

10:03 am
SEASeattle Tacoma International Airport
Search More

as low as

$238

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

5:20 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
10h 20m1 stop · MDW

Nov 2

12:40 am
SEASeattle Tacoma International Airport
Search More

as low as

$240

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

11:00 am
BWIBaltimore/Washington International Thurgood Marshall Airport
15h 55m1 stop · SJC

Nov 1

11:55 pm
SEASeattle Tacoma International Airport
Search More

as low as

$240

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

10:35 am
BWIBaltimore/Washington International Thurgood Marshall Airport
16h 20m1 stop · SJC

Nov 1

11:55 pm
SEASeattle Tacoma International Airport
Search More

as low as

$240

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

6:20 am
BWIBaltimore/Washington International Thurgood Marshall Airport
11h 45m1 stop · SJC

Nov 1

3:05 pm
SEASeattle Tacoma International Airport
Search More

as low as

$266

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

8:05 am
BWIBaltimore/Washington International Thurgood Marshall Airport
14h 10m1 stop · AUS

Nov 1

7:15 pm
SEASeattle Tacoma International Airport
Search More

as low as

$266

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

11:00 am
BWIBaltimore/Washington International Thurgood Marshall Airport
14h 5m1 stop · OAK

Nov 1

10:05 pm
SEASeattle Tacoma International Airport
Search More

as low as

$266

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

10:35 am
BWIBaltimore/Washington International Thurgood Marshall Airport
14h 30m1 stop · OAK

Nov 1

10:05 pm
SEASeattle Tacoma International Airport
Search More

as low as

$266

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

2:55 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
12h 45m1 stop · MDW

Nov 2

12:40 am
SEASeattle Tacoma International Airport
Search More

as low as

$276

Baltimore, US (BWI) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

12:05 pm
BWIBaltimore/Washington International Thurgood Marshall Airport
13h 55m1 stop · DEN

Nov 1

11:00 pm
SEASeattle Tacoma International Airport
Search More

as low as

$291

Best Seattle Hotel + Flight Packages

Baltimore - Seattle packages

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When is the cheapest time to fly?

Cheapest in late January at about $357

Fares from Baltimore to Seattle are lowest in late January, around $357, and January is the cheapest month overall, averaging $365. They peak in late December at about $527, $170 more than the low. The yearly average is $427.

JanFebMarAprMayJunJulAugSepOctNovDec$0$100$200$300$400$500$600
Show the data
When is the cheapest time to fly?
MonthAverage fareEarly monthLate month
January$365$373$357
February$372$362$384
March$418$408$427
April$413$424$402
May$436$417$453
June$477$460$494
July$497$492$502
August$470$497$445
September$393$398$387
October$391$406$377
November$409$387$430
December$488$446$527

How far in advance should I book?

Cheapest about 4 weeks out at $338

Book about 4 weeks before departure for the best fares from Baltimore to Seattle, around $338. Booking in the final days before the flight costs about $421, $83 more. Booking six months ahead runs about $494.

1w2w1mo2mo3mo4mo5mo$0$100$200$300$400$500$600
Show the data
How far in advance should I book? (selected points, lowest and highest included)
Days before departureAverage fare
180 days$494
172 days$502
164 days$498
156 days$477
148 days$454
140 days$441
132 days$434
124 days$423
116 days$417
108 days$415
100 days$401
92 days$377
84 days$359
76 days$362
68 days$372
2mo$364
52 days$353
44 days$349
36 days$341
31 days$338
28 days$339
20 days$356
12 days$384
4 days$410
0 days$421

What's the cheapest day of the week to fly?

Tuesday is the cheapest day of the week to fly from Baltimore to Seattle. At $387 it is 6% cheaper than the average day. Sunday is the most expensive day, 6% above average.

$437Sun$412Mon$387Tue$407Wed$422Thu$407Fri$405Sat
Show the data
What's the cheapest day of the week to fly?
DayAverage fare
Sun$437
Mon$412
Tue$387
Wed$407
Thu$422
Fri$407
Sat$405

When is the best time of day to fly?

Midday (12pm - 2pm) is the cheapest time of day to fly from Baltimore to Seattle. At $380 it is 7% cheaper than the average time. Afternoon (2pm - 5pm) is the most expensive time, 2% above average.

$412Morning$380Midday$416Afternoon$415Evening$411Late Night
Show the data
When is the best time of day to fly?
Time of dayAverage fare
Morning$412
Midday$380
Afternoon$416
Evening$415
Late Night$411

What do round-trip flights from Baltimore to Seattle cost?

Share of fares in each price range, adjusted to current prices.

9%$150to $30024%$300to $45034%$450to $60014%$600to $75012%$750to $9004%$900to $1,0503%$1,050and up
Show the data
What do round-trip flights from Baltimore to Seattle cost?
Price rangeShare of fares
$150 to $3009%
$300 to $45024%
$450 to $60034%
$600 to $75014%
$750 to $90012%
$900 to $1,0504%
$1,050 and up3%
Methodology: learn how we calculate these charts

The charts “When is the cheapest time to fly?”, “How far in advance should I book?”, “What's the cheapest day of the week to fly?” and “What do round-trip flights from Baltimore to Seattle cost?” are built from the prices Priceline customers actually paid for flights on this route over the past 12 months or more.

Where a route has too few bookings to fill every point in a chart, we borrow the shape of the curve from a group of routes with similar price behavior and fit it to the fares booked on this route.

Because past fares don’t reflect today’s market, we then adjust the historical prices for current conditions such as inflation and fuel costs, using the round-trip fares found in recent searches on this route.

The chart “When is the best time of day to fly?” is calculated directly from the fares found in recent searches, not from historical bookings.

Frequently Asked Questions

Everything you need to know about flying from Baltimore to Seattle.

What is the typical flight duration from Baltimore to Seattle?

The flight from Baltimore to Seattle is about 2,330 miles. A typical nonstop flight takes about 5 hours and 50 minutes, while the return leg from Seattle to Baltimore is shorter at about 5 hours and 5 minutes, since prevailing winds make the westbound trip longer.
Methodology
Flight times and distances come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). The typical flight time is the median scheduled block time across all carriers on the route, computed the same way in both directions so the difference reflects prevailing winds rather than any change in method. Distance is the great-circle distance between the two airports, so the actual flown track is typically 2-5% longer.

Are there any direct flights from Baltimore to Seattle?

Yes, Alaska Airlines and Southwest Airlines fly non-stop from Baltimore to Seattle. Alaska runs two daily flights (14 weekly), and Southwest runs one daily flight (7 weekly), both operating every day of the week. These are the two carriers currently scheduled non-stop on the route.
Methodology
Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.

What are the ground transportation options in Seattle?

Seattle-Tacoma International Airport offers several ways to reach downtown Seattle: Link light rail runs every 8–10 minutes and takes about 38 minutes for $3, making it the most-used and most economical choice. Taxis and rideshares (Uber and Lyft) depart from level 3 of the parking garage and reach the city in 20–30 minutes depending on traffic, with flat-rate taxi fares around $20–30 from the airport. Rental cars are available off-site via shuttle and are best for exploring beyond the city center, while shared shuttles and hotel shuttles serve the broader Seattle–Bellevue–Everett corridor. Link light rail is the standard recommendation for most travelers heading downtown.
References

When is the cheapest time to fly from Baltimore to Seattle?

Fares from Baltimore to Seattle are lowest in late January, around $357. January is the cheapest month overall, averaging $365, followed by February ($372) and October ($391). July is the most expensive month at about $497, and fares peak in late December at about $527. The yearly average is $427. Fares are adjusted to current market conditions.
Methodology
Seasonal fares come from Priceline's own air booking-summary archive, analysed in-house and refreshed monthly. For each day of the year we take a representative round-trip fare, a blend of the 25th-percentile and average ticket price over the route's bookings, and smooth the series into a seasonal curve; the half-month low and high and the monthly figures quoted here are averages of that curve. Thin and international routes borrow their seasonal shape from the nearest busy routes, with the price level anchored to the route's own bookings.

How far in advance should I book tickets from Baltimore to Seattle?

Book about 4 weeks before departure for the best fares from Baltimore to Seattle, around $338. Booking in the final days before the flight costs about $421, $83 more. Booking six months ahead runs about $494. Fares are adjusted to current market conditions.
Methodology
Booking-window guidance comes from the same monthly in-house analysis of Priceline's own air booking-summary archive. We aggregate the route's bookings by how many days before departure they were made, from about 180 days out to the day of travel, smooth the curve, and highlight the stretch of lead times with the lowest average fare. Thin and international routes borrow the curve shape from the nearest busy routes, anchored to the route's own price level. It reflects current fares and is refreshed monthly.

Are overnight (red‑eye) flights available from Baltimore to Seattle?

No nonstop red-eye flights operate from Baltimore to Seattle, but connecting itineraries are available whose long leg is an overnight flight, typically departing between 7:55 PM and 10:10 PM and arriving just after midnight. Southwest offers overnight legs through Chicago Midway (arriving 12:40 AM), Nashville (12:40 AM), Phoenix (12:10 AM), and San Diego (12:15 AM), while American offers them through Dallas/Fort Worth (arriving 12:10 AM) and Chicago O'Hare (arriving 12:36 AM). All of these land in the early hours just past midnight.
Methodology
Red-eye flights are identified from scheduled local departure and arrival times and block times in our flight-schedule database — built from published airline timetables and official schedule data, including U.S. Department of Transportation records for domestic routes. A flight counts as a red-eye when it departs in the afternoon or evening (3 p.m. or later local time) or in the early hours before 4 a.m., and is in the air at some point between midnight and 4 a.m. local time at both its departure airport and its arrival airport. An evening flight that lands before midnight at its destination is never counted, nor is a morning departure or a daytime long-haul that reaches the next calendar date only because of time zones. Each red-eye is labelled with its timing (for example, overnight and landing the next morning, or late-night and landing after midnight). For connecting itineraries the same rule is applied to the longer leg, from one representative day's flight search.

Which airlines usually operate this route from Baltimore to Seattle?

Alaska Airlines and Southwest Airlines are the carriers currently scheduled non-stop from Baltimore to Seattle. Alaska operates 14 weekly flights, typically departing at 7:03 AM and 6:07 PM, while Southwest flies 7 weekly flights with departures at 9:25 AM, 10:35 AM, 3:45 PM, and 4:20 PM. Alaska Airlines is a member of the oneworld alliance; Southwest is not an alliance member.
Methodology
Airlines and weekly frequencies come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a typical fare is shown for a carrier, it is the median of the real fares Priceline users found on this route in the last 72 hours.

How reliable are on‑time arrivals on this route from Baltimore to Seattle?

Southwest is the most reliable carrier between Baltimore and Seattle, with 73.9% of arrivals landing within 15 minutes of schedule and no cancellations in the period measured. Alaska Airlines arrives on time 71.1% of the time, with a 0.7% cancellation rate.
Methodology
On-time arrival and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, which covers U.S. domestic routes only; a flight counts as on time when it arrives within 15 minutes of schedule. Carriers are ranked by arrival on-time rate on this route, and the carrier list itself comes from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI).

Which airport should I use in Seattle?

Seattle-Tacoma International Airport is the only major commercial airport serving Seattle. It is about 14 miles south of downtown and is used by Alaska Airlines and Delta as hubs, along with most major domestic and international carriers.

How do I get to Baltimore/Washington Intl Thurgood Marshall Airport from the city center?

Getting to BWI from downtown Baltimore is straightforward, with the Maryland Transit Administration Light Rail running directly from the city center to the airport terminal for a single low fare. Taxis and ride-share services like Uber pick up and drop off outside the terminal, offering door-to-door convenience but at a higher cost than rail. Driving is also popular, with several on-site parking garages and lots, though the Light Rail is typically the fastest and most budget-friendly option for solo travelers avoiding traffic.
References

Are there hotels or sleeping facilities at Seattle airport?

Seattle-Tacoma International Airport has no transit hotels or airside accommodations, so overnight guests must exit the secure area and clear security again in the morning. There are no sleep cabins, pods, or day rooms at the airport. Several nearby hotels offer free shuttles, including the Hilton Seattle Airport & Conference Center, which is a 5-10 minute walk and partially accessible by skybridge to the light rail station, and the Skybridge Seattle Airport Hotel, Radisson Hotel Seattle Airport, Spark by Hilton, and Coast Gateway Hotel.
References

What facilities and services are available to travelers at Seattle-Tacoma International Airport?

Seattle-Tacoma International Airport offers free Wi-Fi throughout the terminal and power outlets at the gates. There are luggage carts, storage, and porting services, plus a lost and found open daily from 8 a.m. Language interpretation and translation support is available throughout the terminal. Family travel features include a kids area and family restrooms. Duty-free shopping is available on Concourses A, C, and S, and there are over 50 dining options in the post-security areas.
References

Are there accessible services or children's facilities at the Baltimore and Seattle airports?

Baltimore/Washington International Thurgood Marshall Airport participates in the Hidden Disabilities Sunflower program, offers wheelchair-accessible shuttles and disabled parking, has family restrooms throughout the terminal including three with adult changing stations, and provides private nursing rooms and pods; travelers should contact their airline for wheelchair assistance. Seattle-Tacoma International Airport was the first U.S. airport to offer sunflower lanyards, provides hearing loops at select airline counters and gates, wheelchair-accessible taxis, two sensory rooms, an adult changing table in a family restroom, Aira for blind or low-vision travelers, and free sunflower lanyards at customer service desks, with wheelchair assistance arranged directly through the airline. Both airports recommend planning ahead with your airline for mobility assistance, boarding help, and specific seating.
References

What aircraft are typically used on flights from Baltimore to Seattle?

Alaska Airlines operates the most flights from Baltimore to Seattle, using Boeing 737 family aircraft. Southwest Airlines also flies the route nonstop, likewise with Boeing 737 family aircraft.
Methodology
Aircraft types come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). For U.S. routes the type is grounded in the tail number that actually operated the flight; elsewhere it comes from the airline's filed equipment code. Where the source does not commit to a specific variant we name the aircraft family (for example Airbus A320 family) rather than guess, and where no reliable type is on file the aircraft is omitted rather than estimated. Types describe typical scheduled equipment and can vary with seasonal or day-of-week assignments and last-minute swaps.

Which airline alliances serve flights from Baltimore to Seattle?

Non-stop Baltimore–Seattle service is currently flown by Alaska Airlines and Southwest Airlines, with Alaska operating up to 14 weekly departures and Southwest 7. Alaska is a member of the oneworld alliance, while Southwest belongs to no alliance. Other alliances may reach Seattle from Baltimore only via connections.
Methodology
Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.

What are the best airport lounge options when departing from Baltimore?

When departing from Baltimore on your way to Seattle, The Club BWI in Concourse D is the main lounge option, open daily from 4:15 AM to 10:30 PM. It welcomes any traveler with a day pass, regardless of airline or ticket class, and also accepts Priority Pass, Lounge Key, and Lounge Club memberships. The lounge offers complimentary premium alcoholic and nonalcoholic beverages, snacks, Wi-Fi, and reading materials, with seating for 50 in a 2,200-square-foot space. A USO Lounge in the Main Terminal is available for active duty military, National Guard, reservists, their dependents, and retired military. There is also a Chesapeake Club Lounge in Concourse E, though access details beyond a same-day boarding pass for first class passengers are limited.
References

Are same‑day changes or standby possible on this route?

Same-day changes and standby depend on your airline and fare class, with flexible tickets and premium cabins offering the most reliable options on BWI to SEA.