Seattle — flights from Salt Lake City to Seattle

Flight Deals from Salt Lake City to Seattle from $143

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Good to Know

Essential information to help you plan your flight from Salt Lake City to Seattle.

Timing Your Trip

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

Price Drop Deals

Southwest AirlinesSouthwest Airlinesfound Oct 10
11/02/26
10:45 am
SLCSalt Lake City International Airport
24h 40mSANSan Diego International Airport
11/03/26
10:25 am
SEASeattle Tacoma International Airport
11/09/26
5:15 am
SEASeattle Tacoma International Airport
6h 25mPHXPhoenix Sky Harbor International Airport
11/09/26
12:40 pm
SLCSalt Lake City International Airport
$301
Southwest AirlinesSouthwest Airlinesfound Oct 10
11/02/26
7:00 am
SLCSalt Lake City International Airport
7h 0mSANSan Diego International Airport
11/02/26
1:00 pm
SEASeattle Tacoma International Airport
11/09/26
5:15 am
SEASeattle Tacoma International Airport
6h 25mPHXPhoenix Sky Harbor International Airport
11/09/26
12:40 pm
SLCSalt Lake City International Airport
$308
Southwest AirlinesSouthwest Airlinesfound Oct 10
11/02/26
5:55 pm
SLCSalt Lake City International Airport
8h 0mPHXPhoenix Sky Harbor International Airport
11/03/26
12:55 am
SEASeattle Tacoma International Airport
11/09/26
5:15 am
SEASeattle Tacoma International Airport
6h 25mPHXPhoenix Sky Harbor International Airport
11/09/26
12:40 pm
SLCSalt Lake City International Airport
$308
Alaska AirlinesAlaska Airlinesfound Oct 14
11/18/26
8:20 am
SLCSalt Lake City International Airport
4h 22mPDXPortland International Airport
11/18/26
11:42 am
PAESnohomish County (Paine Field) Airport
11/25/26
7:05 am
SEASeattle Tacoma International Airport
2h 7m
11/25/26
10:12 am
SLCSalt Lake City International Airport
$343
Flight plus hotel
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Southwest AirlinesSouthwest Airlinesfound Oct 10
11/02/26
7:00 am
SLCSalt Lake City International Airport
7h 0mSANSan Diego International Airport
11/02/26
1:00 pm
SEASeattle Tacoma International Airport
11/09/26
5:15 am
SEASeattle Tacoma International Airport
8h 10mPHXPhoenix Sky Harbor International Airport
11/09/26
2:25 pm
SLCSalt Lake City International Airport
$308
Alaska AirlinesAlaska Airlinesfound Oct 10
11/02/26
2:20 pm
SLCSalt Lake City International Airport
2h 15m
11/02/26
3:35 pm
SEASeattle Tacoma International Airport
11/09/26
8:48 pm
SEASeattle Tacoma International Airport
14h 12mSANSan Diego International Airport
11/10/26
12:00 pm
SLCSalt Lake City International Airport
$346
Southwest AirlinesSouthwest Airlinesfound Oct 10
11/02/26
5:55 pm
SLCSalt Lake City International Airport
8h 0mPHXPhoenix Sky Harbor International Airport
11/03/26
12:55 am
SEASeattle Tacoma International Airport
11/09/26
5:15 am
SEASeattle Tacoma International Airport
8h 10mPHXPhoenix Sky Harbor International Airport
11/09/26
2:25 pm
SLCSalt Lake City International Airport
$308
Alaska AirlinesAlaska Airlinesfound Oct 10
11/02/26
2:20 pm
SLCSalt Lake City International Airport
2h 15m
11/02/26
3:35 pm
SEASeattle Tacoma International Airport
11/09/26
7:46 pm
SEASeattle Tacoma International Airport
15h 14mSANSan Diego International Airport
11/10/26
12:00 pm
SLCSalt Lake City International Airport
$346
American AirlinesAmerican Airlinesfound Oct 14
11/18/26
1:31 pm
SLCSalt Lake City International Airport
7h 38mPHXPhoenix Sky Harbor International Airport
11/18/26
8:09 pm
SEASeattle Tacoma International Airport
11/25/26
3:00 pm
SEASeattle Tacoma International Airport
6h 57mPHXPhoenix Sky Harbor International Airport
11/25/26
10:57 pm
SLCSalt Lake City International Airport
$392
Southwest AirlinesSouthwest Airlinesfound Oct 10
11/02/26
7:00 am
SLCSalt Lake City International Airport
7h 0mSANSan Diego International Airport
11/02/26
1:00 pm
SEASeattle Tacoma International Airport
11/09/26
5:00 am
SEASeattle Tacoma International Airport
10h 45mSMFSacramento International Airport
11/09/26
4:45 pm
SLCSalt Lake City International Airport
$308

Top Deals on flights from Salt Lake City to Seattle

Salt Lake City, US (SLC) - Seattle, US (SEA)

Frontier AirlinesFrontier Airlines

Nov 1

11:46 am
SLCSalt Lake City International Airport
28h 26m1 stop · DEN

Nov 2

3:12 pm
SEASeattle Tacoma International Airport
Search More

as low as

$143

Salt Lake City, US (SLC) - Seattle, US (SEA)

Frontier AirlinesFrontier Airlines

Nov 1

4:16 pm
SLCSalt Lake City International Airport
23h 56m1 stop · DEN

Nov 2

3:12 pm
SEASeattle Tacoma International Airport
Search More

as low as

$158

Salt Lake City, US (SLC) - Seattle, US (SEA)

Frontier AirlinesFrontier Airlines

Nov 1

7:42 pm
SLCSalt Lake City International Airport
23h 51m1 stop · LAX

Nov 2

6:33 pm
SEASeattle Tacoma International Airport
Search More

as low as

$178

Salt Lake City, US (SLC) - Seattle, US (SEA)

Frontier AirlinesFrontier Airlines

Nov 1

9:28 am
SLCSalt Lake City International Airport
25h 17m1 stop · LAS

Nov 2

9:45 am
SEASeattle Tacoma International Airport
Search More

as low as

$219

Salt Lake City, US (SLC) - Seattle, US (SEA)

Alaska AirlinesAlaska Airlines

Nov 1

8:20 am
SLCSalt Lake City International Airport
15h 40m1 stop · PDX

Nov 1

11:00 pm
SEASeattle Tacoma International Airport
Search More

as low as

$238

Salt Lake City, US (SLC) - Seattle, US (SEA)

Alaska AirlinesAlaska Airlines

Nov 1

8:20 am
SLCSalt Lake City International Airport
22h 40m1 stop · PDX

Nov 2

6:00 am
SEASeattle Tacoma International Airport
Search More

as low as

$238

Salt Lake City, US (SLC) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

4:15 pm
SLCSalt Lake City International Airport
7h 45m1 stop · DEN

Nov 1

11:00 pm
SEASeattle Tacoma International Airport
Search More

as low as

$255

Salt Lake City, US (SLC) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

4:05 pm
SLCSalt Lake City International Airport
8h 50m1 stop · SJC

Nov 1

11:55 pm
SEASeattle Tacoma International Airport
Search More

as low as

$260

Salt Lake City, US (SLC) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

6:00 am
SLCSalt Lake City International Airport
8h 55m1 stop · OAK

Nov 1

1:55 pm
SEASeattle Tacoma International Airport
Search More

as low as

$260

Salt Lake City, US (SLC) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

11:45 am
SLCSalt Lake City International Airport
12h 15m1 stop · DEN

Nov 1

11:00 pm
SEASeattle Tacoma International Airport
Search More

as low as

$260

Salt Lake City, US (SLC) - Seattle, US (SEA)

Southwest AirlinesSouthwest Airlines

Nov 1

9:25 pm
SLCSalt Lake City International Airport
11h 25m1 stop · OAK

Nov 2

7:50 am
SEASeattle Tacoma International Airport
Search More

as low as

$266

Salt Lake City, US (SLC) - Seattle, US (SEA)

United AirlinesUnited Airlines

Nov 1

4:34 pm
SLCSalt Lake City International Airport
5h 13m1 stop · SFO

Nov 1

8:47 pm
SEASeattle Tacoma International Airport
Search More

as low as

$267

Best Seattle Hotel + Flight Packages

Salt Lake City - Seattle packages

Best Seattle Hotel + Flight + Car Packages

Salt Lake City - Seattle packages

When is the cheapest time to fly?

Cheapest in late January at about $317

Fares from Salt Lake City to Seattle are lowest in late January, around $317, and January is the cheapest month overall, averaging $319. They peak in early July at about $482, $165 more than the low. The yearly average is $375.

JanFebMarAprMayJunJulAugSepOctNovDec$0$60$120$180$240$300$360$420$480$540
Show the data
When is the cheapest time to fly?
MonthAverage fareEarly monthLate month
January$319$320$317
February$326$326$327
March$349$332$365
April$365$372$357
May$385$369$400
June$450$438$463
July$476$482$471
August$406$430$383
September$368$365$370
October$343$360$327
November$341$320$361
December$372$349$394

How far in advance should I book?

Cheapest about 7 weeks out at $301

Book about 7 weeks before departure for the best fares from Salt Lake City to Seattle, around $301. Booking in the final days before the flight costs about $463, $162 more. Booking six months ahead runs about $486.

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$486
172 days$480
164 days$472
156 days$457
148 days$443
140 days$434
132 days$417
124 days$391
116 days$380
108 days$373
100 days$359
92 days$350
84 days$341
76 days$324
68 days$312
2mo$310
52 days$306
47 days$301
44 days$301
36 days$303
28 days$306
20 days$332
12 days$390
4 days$445
0 days$463

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

Friday is the cheapest day of the week to fly from Salt Lake City to Seattle. At $351 it is 5% cheaper than the average day. Sunday is the most expensive day, 12% above average.

$416Sun$374Mon$368Tue$365Wed$355Thu$351Fri$368Sat
Show the data
What's the cheapest day of the week to fly?
DayAverage fare
Sun$416
Mon$374
Tue$368
Wed$365
Thu$355
Fri$351
Sat$368

When is the best time of day to fly?

Midday (12pm - 2pm) is the cheapest time of day to fly from Salt Lake City to Seattle. At $361 it is 2% cheaper than the average time. Afternoon (2pm - 5pm) is the most expensive time, 3% above average.

$369Morning$361Midday$380Afternoon$366Evening$371Late Night
Show the data
When is the best time of day to fly?
Time of dayAverage fare
Morning$369
Midday$361
Afternoon$380
Evening$366
Late Night$371

What do round-trip flights from Salt Lake City to Seattle cost?

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

7%$0to $20028%$200to $40043%$400to $60012%$600to $8007%$800to $1,0003%$1,000to $1,200<1%$1,200and up
Show the data
What do round-trip flights from Salt Lake City to Seattle cost?
Price rangeShare of fares
$0 to $2007%
$200 to $40028%
$400 to $60043%
$600 to $80012%
$800 to $1,0007%
$1,000 to $1,2003%
$1,200 and up&lt;1%
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 Salt Lake City 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 Salt Lake City to Seattle.

What is the typical flight duration from Salt Lake City to Seattle?

The flight from Salt Lake City to Seattle is about 690 miles and typically takes 2 hours and 16 minutes. The return flight to Salt Lake City runs about 2 hours and 5 minutes, so the westbound leg is only slightly 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 Salt Lake City to Seattle?

Delta Air Lines and Alaska Airlines both fly non-stop from Salt Lake City to Seattle, with service every day of the week. Delta operates 48 weekly non-stop flights and Alaska Airlines 46 weekly (including one flown by SkyWest under the Alaska brand), so there are roughly 90 to 94 non-stops each week. Both carriers run multiple daily departures, so you have plenty of non-stop options throughout the day.
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?

Getting from Sea-Tac into downtown Seattle is straightforward, with the Link light rail the most-used option — it runs every 8–10 minutes and reaches Westlake Station in about 38 minutes for just $3. Taxis and ride-shares like Uber and Lyft pick up on level 3 of the parking garage and take 20–30 minutes depending on traffic, with metered taxi fares starting at a $20 minimum. Rental cars are available at an off-site facility via shuttle, and some hotels also offer their own shuttle service.
References

When is the cheapest time to fly from Salt Lake City to Seattle?

Fares from Salt Lake City to Seattle are lowest in late January, around $317. January is the cheapest month overall, averaging $319, followed by February ($326) and November ($341). July is the most expensive month at about $476, and fares peak in early July at about $482. The yearly average is $375. 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 Salt Lake City to Seattle?

Book about 7 weeks before departure for the best fares from Salt Lake City to Seattle, around $301. Booking in the final days before the flight costs about $463, $162 more. Booking six months ahead runs about $486. 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 Salt Lake City to Seattle?

There are no nonstop red-eye flights from Salt Lake City to Seattle, but connecting itineraries with an overnight long leg do operate, all arriving in the early hours after midnight. Southwest runs red-eyes into Seattle via Phoenix (departing 10:30 PM, arriving 1:40 AM), Las Vegas (departing 10:15 PM, arriving 1:00 AM), and Chicago Midway (departing 10:05 PM, arriving 12:40 AM), while United runs one via San Francisco (departing 10:45 PM, arriving 1:15 AM).
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 Salt Lake City to Seattle?

Delta Air Lines and Alaska Airlines operate non-stop service from Salt Lake City to Seattle, with Delta offering 48 weekly flights across seven daily departures and Alaska offering 39 weekly flights plus 7 additional weekly flights operated by SkyWest Airlines. Both carriers fly this route daily. Delta is a SkyTeam member, and Alaska Airlines is a member of oneworld.
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 Salt Lake City to Seattle?

On-time arrival reliability on the Salt Lake City–Seattle route ranges from 66.2% to 83.7% depending on the carrier. Delta is the most reliable, with 83.7% of flights arriving within 15 minutes of schedule and a 0.3% cancellation rate, followed by Alaska (operated by SkyWest) at 76.5%, Frontier at 72.3%, and Alaska mainline at 66.2% with a 1.6% 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 primary commercial airport for Seattle, located about 14 miles south of downtown. It serves all major airlines and alliances, including Alaska, Delta, and United, and is the main gateway for both business and leisure travel to the region. Paine Field in Everett offers limited commercial flights, mostly on Alaska Airlines, and is farther from downtown Seattle, making it a niche option for travellers near the northern suburbs.

How do I get to Salt Lake City Intl Airport from the city center?

Getting to Salt Lake City International Airport from downtown is quick and easy, with the airport just 10 minutes by car. The TRAX Green Line light rail is the most popular and affordable option, running every 15 minutes and taking about 20-25 minutes for a flat fare of $2.50. Taxis and ride-share services like Uber and Lyft are the fastest at 10-15 minutes but cost more, while hotel shuttles and driving yourself with onsite parking are also available. For most travelers, TRAX is the best balance of cost and convenience, though a taxi or ride-share is the quickest door-to-door choice.
References

Are there hotels or sleeping facilities at Seattle airport?

There is no hotel directly connected to Seattle-Tacoma International Airport, and no on-site sleeping cabins, pods, or day rooms. Several nearby hotels offer free shuttle service, including the Hilton Seattle Airport & Conference Center (0.3 miles, a 5-10 minute walk), the Skybridge Seattle Airport Hotel, the Radisson Hotel Seattle Airport, the Spark by Hilton, and the 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 and power outlets at the gates. Travelers can use luggage storage and porting services, and there is a lost and found open daily from 8 a.m. Information desks are staffed by Pathfinders and volunteers daily from 7 a.m. to 9 p.m., with language interpretation and translation support available throughout the terminal. The airport has more than 50 dining options post-security, duty-free shopping on Concourses A, C, and S, and a kids area for families. A water refill station is available at the terminal, and workspaces are provided for travelers needing to work.
References

Are there accessible services or children's facilities at the Salt Lake City and Seattle airports?

At Salt Lake City International Airport, accessible ramps, elevators, and restrooms are provided throughout the terminal, and passengers who are blind or have low vision can use the free Aira visual interpreting app. Electric carts shuttle passengers on Concourse A between 6 a.m. and 10:30 p.m., and wheelchair service can be requested by calling 801-744-4292; travelers should specify their needs to the airline when booking. At Seattle-Tacoma International Airport, free sunflower lanyards signal that a traveler may need extra help, hearing loops assist those with T-coil hearing aids at select airline counters and gates, and the Aira app is also available. SEA has two sensory rooms, an adult changing table in a family restroom, and wheelchair-accessible taxis; passengers should contact their airline in advance to arrange wheelchair assistance and other accommodations.
References

What aircraft are typically used on flights from Salt Lake City to Seattle?

On flights from Salt Lake City to Seattle, Delta operates the most service, flying a mix of Boeing 737-800s, Airbus A320 family aircraft, Boeing 737s, and Airbus A321s. Alaska Airlines flies Boeing 737 family aircraft, while SkyWest operates Embraer E175s for Alaska Airlines.
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 Salt Lake City to Seattle?

Delta Air Lines and Alaska Airlines are the carriers currently scheduled nonstop between Salt Lake City and Seattle, flying daily with multiple departures each. Delta is a SkyTeam member, while Alaska Airlines belongs to oneworld (some of its flights are operated by SkyWest Airlines, which is not itself an alliance member). Other alliances may serve the route 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 Salt Lake City?

Salt Lake City International Airport offers several lounge options across its two concourses. Delta Sky Club has locations in both Concourse A and Concourse B, with the Concourse B club being the second largest in the network at nearly 34,000 square feet and seating 600 guests, featuring a wrap-around premium bar and nine sound-proof telephone booths. The Centurion Lounge is located in Concourse B, and Minute Suites and XpresSpa are available in Concourse A, with Minute Suites offering sleep pods for resting and recharging.
References

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

Same-day changes and standby depend on the airline and fare class, with flexible and premium tickets offering the best options on Salt Lake City to Seattle flights.