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Philadelphia International Airport to Seattle-Tacoma International Airport flight

Explore the cheapest one-way and round-trip flights from Philadelphia International Airport to Seattle-Tacoma International Airport over the next 90 days, with one-way fares from DKK 766 and round-trip from DKK 1,414. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        PHL 18:39
        6h 2m
        Direct
        SEA 21:41
        Philadelphia - Seattle | Fri, Oct 9 | Alaska Airlines
        SEA 09:17
        5h 22m
        Direct
        PHL 17:39
        Seattle - Philadelphia | Fri, Oct 16 | Alaska Airlines
        DKK 2,069 DKK 2,874
        28% off
        28% off
        DKK 2,874 DKK 2,069
      • PHL 18:39
        6h 2m
        Direct
        SEA 21:41
        Philadelphia - Seattle | Sat, Oct 10 | Alaska Airlines
        SEA 21:25
        5h 15m
        Direct
        PHL 05:40
        Seattle - Philadelphia | Sat, Oct 17 | Alaska Airlines
        DKK 2,069 DKK 2,874
        28% off
        28% off
        DKK 2,874 DKK 2,069
      • PHL 08:00
        29h 39m
        1 stop
        SEA 10:39
        Philadelphia - Seattle | Mon, Aug 31 | Frontier Airlines
        SEA 21:36
        29h 54m
        1 stop
        PHL 06:30
        Seattle - Philadelphia | Mon, Sep 7 | Frontier Airlines
        DKK 1,414 DKK 2,874
        51% off
        51% off
        DKK 2,874 DKK 1,414
      • PHL 07:00
        11h 28m
        1 stop
        SEA 15:28
        Philadelphia - Seattle | Thu, Sep 3 | Frontier Airlines
        SEA 21:36
        29h 54m
        1 stop
        PHL 06:30
        Seattle - Philadelphia | Mon, Sep 7 | Frontier Airlines
        DKK 1,496
        48% off
        DKK 2,874 DKK 1,496
      • PHL 08:00
        29h 39m
        1 stop
        SEA 10:39
        Philadelphia - Seattle | Wed, Sep 2 | Frontier Airlines
        SEA 21:36
        29h 54m
        1 stop
        PHL 06:30
        Seattle - Philadelphia | Mon, Sep 7 | Frontier Airlines
        DKK 1,521
        47% off
        DKK 2,874 DKK 1,521
      • PHL 20:44
        30h 43m
        1 stop
        SEA 00:27
        Philadelphia - Seattle | Tue, Sep 22 | Frontier Airlines
        SEA 07:00
        19h 36m
        1 stop
        PHL 05:36
        Seattle - Philadelphia | Tue, Sep 29 | Frontier Airlines
        DKK 1,608
        44% off
        DKK 2,874 DKK 1,608
      • PHL 08:00
        29h 39m
        1 stop
        SEA 10:39
        Philadelphia - Seattle | Tue, Sep 1 | Frontier Airlines
        SEA 19:06
        7h 33m
        1 stop
        PHL 05:39
        Seattle - Philadelphia | Fri, Sep 4 | Frontier Airlines
        DKK 1,609
        44% off
        DKK 2,874 DKK 1,609
      • PHL 08:00
        29h 39m
        1 stop
        SEA 10:39
        Philadelphia - Seattle | Mon, Aug 24 | Frontier Airlines
        SEA 21:29
        30h 1m
        1 stop
        PHL 06:30
        Seattle - Philadelphia | Thu, Aug 27 | Frontier Airlines
        DKK 1,645
        43% off
        DKK 2,874 DKK 1,645
      • PHL 08:00
        29h 39m
        1 stop
        SEA 10:39
        Philadelphia - Seattle | Fri, Aug 21 | Frontier Airlines
        SEA 21:29
        30h 1m
        1 stop
        PHL 06:30
        Seattle - Philadelphia | Mon, Aug 24 | Frontier Airlines
        DKK 1,659
        42% off
        DKK 2,874 DKK 1,659
      • PHL 20:37
        15h 42m
        1 stop
        SEA 09:19
        Philadelphia - Seattle | Fri, Sep 4 | Frontier Airlines
        SEA 21:29
        30h 1m
        1 stop
        PHL 06:30
        Seattle - Philadelphia | Mon, Sep 7 | Frontier Airlines
        DKK 1,673
        42% off
        DKK 2,874 DKK 1,673
      • PHL 20:37
        15h 42m
        1 stop
        SEA 09:19
        Philadelphia - Seattle | Mon, Sep 7 | Frontier Airlines
        SEA 07:00
        19h 36m
        1 stop
        PHL 05:36
        Seattle - Philadelphia | Sat, Sep 12 | Frontier Airlines
        DKK 1,674
        42% off
        DKK 2,874 DKK 1,674
      • PHL 07:00
        30h 39m
        1 stop
        SEA 10:39
        Philadelphia - Seattle | Thu, Aug 27 | Frontier Airlines
        SEA 19:07
        7h 32m
        1 stop
        PHL 05:39
        Seattle - Philadelphia | Tue, Sep 1 | Frontier Airlines
        DKK 1,696
        41% off
        DKK 2,874 DKK 1,696
      • PHL 20:37
        15h 42m
        1 stop
        SEA 09:19
        Philadelphia - Seattle | Sat, Aug 29 | Frontier Airlines
        SEA 19:07
        7h 32m
        1 stop
        PHL 05:39
        Seattle - Philadelphia | Tue, Sep 1 | Frontier Airlines
        DKK 1,696
        41% off
        DKK 2,874 DKK 1,696
      • PHL 20:37
        15h 42m
        1 stop
        SEA 09:19
        Philadelphia - Seattle | Wed, Aug 26 | Frontier Airlines
        SEA 21:29
        30h 1m
        1 stop
        PHL 06:30
        Seattle - Philadelphia | Mon, Aug 31 | Frontier Airlines
        DKK 1,725
        40% off
        DKK 2,874 DKK 1,725
      • PHL 13:00
        17h 25m
        1 stop
        SEA 14:00
        Philadelphia - Seattle | Sat, Aug 22 | Normal Airline
        SEA 15:00
        6h
        Direct
        PHL 16:00
        Seattle - Philadelphia | Mon, Aug 24 | Normal Airline
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      • Cheapest nonstop
        PHL 07:05
        5h 51m
        Direct
        SEA 09:56
        Philadelphia - Seattle | Mon, Sep 28 | Delta Air Lines
        DKK 1,034 DKK 1,478
        30% off
        30% off
        DKK 1,478 DKK 1,034
      • PHL 07:05
        5h 51m
        Direct
        SEA 09:56
        Philadelphia - Seattle | Tue, Sep 8 | Delta Air Lines
        DKK 1,064 DKK 1,478
        28% off
        28% off
        DKK 1,478 DKK 1,064
      • PHL 08:00
        29h 39m
        1 stop
        SEA 10:39
        Philadelphia - Seattle | Tue, Aug 25 | Frontier Airlines
        DKK 766 DKK 1,478
        48% off
        48% off
        DKK 1,478 DKK 766
      • PHL 20:37
        15h 42m
        1 stop
        SEA 09:19
        Philadelphia - Seattle | Sat, Sep 5 | Frontier Airlines
        DKK 771
        48% off
        DKK 1,478 DKK 771
      • PHL 20:37
        18h 43m
        1 stop
        SEA 12:20
        Philadelphia - Seattle | Sun, Aug 30 | Frontier Airlines
        DKK 809
        45% off
        DKK 1,478 DKK 809
      • PHL 20:37
        30h 50m
        1 stop
        SEA 00:27
        Philadelphia - Seattle | Tue, Sep 8 | Frontier Airlines
        DKK 858
        42% off
        DKK 1,478 DKK 858
      • PHL 20:44
        16h 7m
        1 stop
        SEA 09:51
        Philadelphia - Seattle | Sat, Sep 26 | Frontier Airlines
        DKK 863
        42% off
        DKK 1,478 DKK 863
      • PHL 20:44
        16h 7m
        1 stop
        SEA 09:51
        Philadelphia - Seattle | Wed, Oct 14 | Frontier Airlines
        DKK 875
        41% off
        DKK 1,478 DKK 875
      • PHL 12:42
        28h 22m
        1 stop
        SEA 14:04
        Philadelphia - Seattle | Tue, Sep 1 | Frontier Airlines
        DKK 886
        40% off
        DKK 1,478 DKK 886
      • PHL 20:37
        15h 42m
        1 stop
        SEA 09:19
        Philadelphia - Seattle | Sat, Aug 29 | Frontier Airlines
        DKK 921
        38% off
        DKK 1,478 DKK 921
      • PHL 20:37
        15h 42m
        1 stop
        SEA 09:19
        Philadelphia - Seattle | Sat, Aug 22 | Frontier Airlines
        DKK 927
        37% off
        DKK 1,478 DKK 927
      • PHL 20:37
        19h 45m
        1 stop
        SEA 13:22
        Philadelphia - Seattle | Mon, Aug 31 | Frontier Airlines
        DKK 977
        34% off
        DKK 1,478 DKK 977
      • PHL 13:00
        17h 25m
        1 stop
        SEA 14:00
        Philadelphia - Seattle | Sat, Aug 22 | Normal Airline
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Flight fares from Philadelphia International Airport to Seattle-Tacoma International Airport are based on the average fares across airlines for the next three months, based on Trip.com’s latest data.

Trip.com Price Insights: Flights from Philadelphia International Airport to Seattle-Tacoma International Airport

What is the cheapest month to fly from Philadelphia International Airport to Seattle-Tacoma International Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Philadelphia International Airport to Seattle-Tacoma International Airport for each month in the Trip.com database.

Based on Trip.com’s data from the past 12 months, if you’re looking for a low-cost one-way ticket from Philadelphia International Airport to Seattle-Tacoma International Airport, the best time to buy is in March, with an average price of DKK 1,069. You’ll want to avoid April, when the average price can reach as high as DKK 2,112.

DKK 2,112
DKK 1,591
DKK 1,069
DKK 548
    Cheapest
  • DKK 1,423
    Aug
  • DKK 1,346
    Sep
  • DKK 1,569
    Oct
  • DKK 1,648
    Nov
  • DKK 1,983
    Dec
  • DKK 1,171
    Jan
  • DKK 1,758
    Feb
  • DKK 1,069
    Mar
  • DKK 2,112
    Apr
  • DKK 1,733
    May
  • DKK 1,380
    Jun
  • DKK 1,656
    Jul

What is the cheapest day of the week to fly from Philadelphia International Airport to Seattle-Tacoma International Airport?

The data is based on the past 12 months and shows the average ticket prices from Philadelphia International Airport to Seattle-Tacoma International Airport for each day of the week in the Trip.com database.

Based on Trip.com’s data from the past 12 months, the cheapest day to depart from Philadelphia International Airport to Seattle-Tacoma International Airport is Saturday, with average fares typically lower than other days. You’ll want to avoid flying on Friday, as ticket prices are usually the highest that day.

DKK 1,875
DKK 1,627
DKK 1,378
DKK 1,130
    Cheapest
  • DKK 1,807
    Mon
  • DKK 1,448
    Tue
  • DKK 1,571
    Wed
  • DKK 1,574
    Thu
  • DKK 1,875
    Fri
  • DKK 1,378
    Sat
  • DKK 1,809
    Sun

Which airline offers the cheapest flights from Philadelphia International Airport to Seattle-Tacoma International Airport?

The cheapest airline flying from Philadelphia International Airport to Seattle-Tacoma International Airport is Frontier Airlines (from DKK 809) among 8 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From DKK 809
Delta Air Lines
From DKK 1,064
Alaska Airlines
From DKK 1,067
American Airlines
From DKK 1,092
United Airlines
From DKK 1,126
Hahn Air
From DKK 1,196
Sun Country Airlines
From DKK 1,800
Qatar Airways
From DKK 2,452

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What is the flight schedule from Philadelphia International Airport to Seattle-Tacoma International Airport?

Check the schedule for flights from Philadelphia to Seattle and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL2092

    Philadelphia International Airport

    07:05

    PHL

    5h 50m

    09:55

    SEA

    S M T W T F S
    Search

  2. AS1787

    Philadelphia International Airport

    16:17

    PHL

    5h 48m

    Direct

    19:05

    PDX

    S M T W T F S
    Search

  3. AS452

    Portland International Airport

    21:32

    PDX

    1h 7m

    Direct

    22:39

    SEA

    S M T W T F S

  4. DL1692

    Philadelphia International Airport

    18:13

    PHL

    2h 10m

    Direct

    20:23

    ATL

    S M T W T F S
    Search

  5. DL903

    Hartsfield–Jackson Atlanta International Airport

    21:35

    ATL

    5h 24m

    Direct

    23:59

    SEA

    S M T W T F S

  6. F93339

    Philadelphia International Airport

    20:37

    PHL

    4h 27m

    Direct

    23:04

    DEN

    S M T W T F S
    Search

  7. F94545

    Denver International Airport

    07:45

    DEN

    3h 6m

    Direct

    09:51

    SEA

    S M T W T F S

  8. F93339

    Philadelphia International Airport

    20:37

    PHL

    4h 27m

    Direct

    23:04

    DEN

    S M T W T F S
    Search

  9. F91175

    Denver International Airport

    13:04

    DEN

    3h 8m

    Direct

    15:12

    SEA

    S M T W T F S

  10. F91601

    Philadelphia International Airport

    20:44

    PHL

    5h 28m

    Direct

    23:12

    LAS

    S M T W T F S
    Search

  11. F92407

    Harry Reid International Airport

    06:50

    LAS

    2h 55m

    Direct

    09:45

    SEA

    S M T W T F S
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About Philadelphia International Airport and Seattle-Tacoma International Airport

Learn about Philadelphia International Airport (PHL) and Seattle-Tacoma International Airport (SEA) — including location, terminals, transportation, and travel tips.

Flight distance 3,821.03km
Cheapest one-way ticket price DKK 766
Cheapest return ticket price DKK 1,414

FAQs for Philadelphia International Airport to Seattle-Tacoma International Airport Flights

  • How long is the flights from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA)?

    It takes around 6 hours 11 minutes to fly from Philadelphia International Airport (phl) to Seattle-Tacoma International Airport(sea).
  • There are around 4 daily flights from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA).
  • Tickets cost around DKK 1,421 in October, making it the cheapest month to book. Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) is a popular route, so don't forget to book your tickets in advance.
  • The route from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) is quite popular. Without considering departure times or holidays, tickets cost around DKK 2,280 in August, the most expensive month to book this route.
  • The earliest flight departs from Philadelphia International Airport (PHL) at 07:04 and arrives in Seattle-Tacoma International Airport (SEA) at 09:59.
  • The latest flight departs from Philadelphia International Airport (PHL) at 18:53 and arrives in Seattle-Tacoma International Airport (SEA) at 22:00.
    • The distance from Seattle-Tacoma International Airport to downtown is about 17km, by taxi about 30 minutes.
  • American Airlines is a very popular airline operating an average of 812 flights per month.

Most popular destination

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, regulatory fees, etc) with all fees confirmed before payment. Fees for baggage, meals, Wi-Fi, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.