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Essential information to help you plan your flight from Seattle to Philadelphia.
Lowest round-trip price available on Priceline for this route right now.
This fare recently dropped from $417.
1 stop · economyLowest one-way price found on Priceline for this route in the last 16 days. Found 18 days ago.
The typical one-way fare on this route is $288.
Cheapest nonstop found on Priceline for this route in the last 16 days. Found 4 days ago.
$48 more than the cheapest round-trip.
A round-trip at or under $401 is a good deal on this route right now.
75% of the fares we found on this route cost more; only a quarter cost less.
The best day, time of day, season and booking window for this route.
Wednesday departures average $379 on this route, the lowest of any weekday.
$52 less than the average weekday, which is $431.
Evening departures average $413 on this route, the lowest of any time of day.
$12 less than the average departure, which is $425.
Fares average $372 in February, the cheapest month to fly this route, bottoming out near $365 in late January.
$55 below the yearly average of $427.
Fares on this route are lowest when booked about 4 weeks before departure.
Booking then averages $363, versus $443 in the final days before the flight.
Priceline is always monitoring flight prices on this route. When we spot an offer on a specific flight that’s significantly lower than what that flight usually sells for, we call it out here as a price drop.
SEAPHL
18% Price DropUnited Airlines
Depart Nov 14 · Return Nov 17
3-night trip · economy
SEAPHL
17% Price DropUnited Airlines
Depart Nov 6 · Return Nov 11
5-night trip · economy
SEAPHL
17% Price DropUnited Airlines
Depart Nov 9 · Return Nov 13
4-night trip · economy
SEAPHL
17% Price DropUnited Airlines
Depart Nov 11 · Return Nov 14
3-night trip · economy
Express Deals® deliver Priceline’s biggest discounts on flights. Pick your route and dates and we’ll match you with a great offer from a trusted airline. These exclusive “mystery deals” reward flexibility with even deeper savings — your airline is revealed after you book.
We don’t use Express Deal prices when calculating this route’s lowest price or price averages, because these offers require extra flexibility from travelers.
SEAPHL
You’re guaranteed to get one of these airlines:
FrontierSouthwestUnitedAmericanDepart Nov 9 · Return Nov 13
4-night trip · economy
SEAPHL
You’re guaranteed to get one of these airlines:
FrontierSouthwestUnitedAmericanDepart Dec 2 · Return Dec 6
4-night trip · economy
SEAPHL
You’re guaranteed to get one of these airlines:
FrontierSouthwestUnitedAmericanDepart Oct 23 · Return Oct 31
8-night trip · economy
Southwest Airlinesfound Oct 10Southwest Airlinesfound Oct 10American Airlinesfound Oct 15Alaska Airlinesfound Oct 15
Book a flight & hotel together for extra savings.
On average save $240 per traveler
Southwest Airlinesfound Oct 10American Airlinesfound Oct 15Alaska Airlinesfound Oct 15Southwest Airlinesfound Oct 10Southwest Airlinesfound Oct 10American Airlinesfound Oct 15Seattle, US (SEA) - Philadelphia, US (PHL)
Frontier AirlinesOct 22
Oct 24
as low as
$133Seattle, US (SEA) - Philadelphia, US (PHL)
Frontier AirlinesOct 22
Oct 24
as low as
$168Seattle, US (SEA) - Philadelphia, US (PHL)
Southwest AirlinesOct 22
Oct 22
as low as
$175Seattle, US (SEA) - Philadelphia, US (PHL)
Southwest AirlinesOct 22
Oct 23
as low as
$220Seattle, US (SEA) - Philadelphia, US (PHL)
Southwest AirlinesOct 22
Oct 22
as low as
$225Seattle, US (SEA) - Philadelphia, US (PHL)
United AirlinesOct 22
Oct 23
as low as
$240Seattle, US (SEA) - Philadelphia, US (PHL)
American AirlinesOct 22
Oct 23
as low as
$248Seattle, US (SEA) - Philadelphia, US (PHL)
American AirlinesOct 22
Oct 22
as low as
$248Seattle, US (SEA) - Philadelphia, US (PHL)
American AirlinesOct 22
Oct 22
as low as
$248Seattle, US (SEA) - Philadelphia, US (PHL)
Southwest AirlinesOct 22
Oct 22
as low as
$255Seattle, US (SEA) - Philadelphia, US (PHL)
United AirlinesOct 22
Oct 23
as low as
$255Seattle, US (SEA) - Philadelphia, US (PHL)
American AirlinesOct 22
Oct 23
as low as
$258Seattle - Philadelphia packages
Round-trip flight from Seattle
SEA to PHL
Philadelphia Suites - An Extended Stay Hotel near Philadelphia International Airport
Incl. Flight + Hotel
Round-trip flight from Seattle
SEA to PHL
Microtel Inn & Suites By Wyndham Philadelphia Airport
Incl. Flight + Hotel
Round-trip flight from Seattle
SEA to PHL
Sonesta Philadelphia Rittenhouse Square
Incl. Flight + Hotel
Round-trip flight from Seattle
SEA to PHL
Sheraton Philadelphia Downtown
Incl. Flight + Hotel
Round-trip flight from Seattle
SEA to PHL
Wyndham Philadelphia Historic District
Incl. Flight + Hotel
Round-trip flight from Seattle
SEA to PHL
Courtyard by Marriott Philadelphia City Avenue
Incl. Flight + Hotel
Round-trip flight from Seattle
SEA to PHL
Holiday Inn Philadelphia Arpt-Stadium Area By IHG
Incl. Flight + Hotel
Round-trip flight from Seattle
SEA to PHL
Holiday Inn Express Philadelphia Penn's Landing By IHG
Incl. Flight + Hotel
Seattle - Philadelphia packages
Round-trip flight from Seattle
SEA to PHL
Aloft by Marriott Philadelphia Airport
Rental car included
Pick-up in PHL
Incl. Flight + Hotel + Car
Round-trip flight from Seattle
SEA to PHL
Doubletree By Hilton Philadelphia Airport
Rental car included
Pick-up in PHL
Incl. Flight + Hotel + Car
Round-trip flight from Seattle
SEA to PHL
Holiday Inn Express Philadelphia Penn's Landing By IHG
Rental car included
Pick-up in PHL
Incl. Flight + Hotel + Car
Round-trip flight from Seattle
SEA to PHL
Delta Hotels Philadelphia Airport
Rental car included
Pick-up in PHL
Incl. Flight + Hotel + Car
Round-trip flight from Seattle
SEA to PHL
Hilton Philadelphia at Penn’s Landing
Rental car included
Pick-up in PHL
Incl. Flight + Hotel + Car
Round-trip flight from Seattle
SEA to PHL
Embassy Suites by Hilton Philadelphia Airport
Rental car included
Pick-up in PHL
Incl. Flight + Hotel + Car
Round-trip flight from Seattle
SEA to PHL
Holiday Inn Philadelphia Arpt-Stadium Area By IHG
Rental car included
Pick-up in PHL
Incl. Flight + Hotel + Car
Round-trip flight from Seattle
SEA to PHL
Philadelphia Suites - An Extended Stay Hotel near Philadelphia International Airport
Rental car included
Pick-up in PHL
Incl. Flight + Hotel + Car
Cheapest in late January at about $365
Fares from Seattle to Philadelphia are lowest in late January, around $365, and February is the cheapest month overall, averaging $372. They peak in late December at about $519, $154 more than the low. The yearly average is $427.
| Month | Average fare | Early month | Late month |
|---|---|---|---|
| January | $372 | $379 | $365 |
| February | $372 | $371 | $373 |
| March | $394 | $378 | $409 |
| April | $417 | $433 | $402 |
| May | $432 | $416 | $446 |
| June | $470 | $446 | $494 |
| July | $488 | $484 | $491 |
| August | $471 | $483 | $461 |
| September | $416 | $421 | $411 |
| October | $401 | $411 | $392 |
| November | $411 | $400 | $423 |
| December | $485 | $449 | $519 |
Cheapest about 4 weeks out at $363
Book about 4 weeks before departure for the best fares from Seattle to Philadelphia, around $363. Booking in the final days before the flight costs about $443, $80 more. Booking six months ahead runs about $448.
| Days before departure | Average fare |
|---|---|
| 180 days | $448 |
| 172 days | $447 |
| 164 days | $442 |
| 156 days | $436 |
| 148 days | $431 |
| 140 days | $429 |
| 132 days | $417 |
| 124 days | $398 |
| 116 days | $379 |
| 108 days | $369 |
| 100 days | $375 |
| 92 days | $380 |
| 84 days | $380 |
| 76 days | $381 |
| 68 days | $372 |
| 2mo | $364 |
| 52 days | $366 |
| 44 days | $370 |
| 36 days | $367 |
| 31 days | $363 |
| 28 days | $364 |
| 20 days | $383 |
| 12 days | $415 |
| 4 days | $436 |
| 0 days | $443 |
Wednesday is the cheapest day of the week to fly from Seattle to Philadelphia. At $379 it is 12% cheaper than the average day. Sunday is the most expensive day, 17% above average.
| Day | Average fare |
|---|---|
| Sun | $503 |
| Mon | $452 |
| Tue | $408 |
| Wed | $379 |
| Thu | $403 |
| Fri | $425 |
| Sat | $448 |
Evening (5pm - 9pm) is the cheapest time of day to fly from Seattle to Philadelphia. At $413 it is 3% cheaper than the average time. Morning (5am - 12pm) is the most expensive time, 3% above average.
| Time of day | Average fare |
|---|---|
| Early Morning | $420 |
| Morning | $437 |
| Midday | $417 |
| Evening | $413 |
| Late Night | $436 |
Share of fares in each price range, adjusted to current prices.
| Price range | Share of fares |
|---|---|
| $200 to $400 | 14% |
| $400 to $600 | 51% |
| $600 to $800 | 20% |
| $800 to $1,000 | 9% |
| $1,000 to $1,200 | 4% |
| $1,200 and up | 2% |
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 Seattle to Philadelphia 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.
Everything you need to know about flying from Seattle to Philadelphia.