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Cheap flight deals from Philadelphia to Seattle Starting at DKK 455

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip
      • Cheapest nonstop
        PHL06:25 pm
        6h 26m
        Nonstop
        SEA09:51 pm
        Wed, Mar 5|Philadelphia - Seattle|Alaska Airlines
        DKK 849DKK 1,028
        17% OFF
        17% OFF
        DKK 1,028DKK 849

        Choose Alaska Airlines flights from Philadelphia to Seattle. The one-way direct flight with Alaska Airlines departs from Philadelphia International Airport on Wed, Mar 5, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 849 including taxes and charges.

      • PHL05:46 pm
        6h 10m
        Nonstop
        SEA08:56 pm
        Wed, Mar 19|Philadelphia - Seattle|Alaska Airlines
        DKK 905DKK 1,028
        12% OFF
        12% OFF
        DKK 1,028DKK 905

        Choose Alaska Airlines flights from Philadelphia to Seattle. The one-way direct flight with Alaska Airlines departs from Philadelphia International Airport on Wed, Mar 19, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 905 including taxes and charges.

      • PHL03:19 pm
        24h 13m
        1 stop
        SEA12:32 pm
        Tue, Mar 18|Philadelphia - Seattle|Frontier Airlines
        DKK 455DKK 1,028
        56% OFF
        56% OFF
        DKK 1,028DKK 455

        Choose Frontier Airlines flights from Philadelphia to Seattle. The one-way connecting flight with Frontier Airlines departs from Philadelphia International Airport on Tue, Mar 18, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 455 including taxes and charges.

      • PHL07:50 am
        9h 54m
        1 stop
        SEA02:44 pm
        Tue, Mar 4|Philadelphia - Seattle|Frontier Airlines
        DKK 461
        DKK 461

        Choose Frontier Airlines flights from Philadelphia to Seattle. The one-way connecting flight with Frontier Airlines departs from Philadelphia International Airport on Tue, Mar 4, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 461 including taxes and charges.

      • PHL06:40 am
        8h 22m
        1 stop
        SEA12:02 pm
        Mon, Mar 10|Philadelphia - Seattle|Frontier Airlines
        DKK 484
        DKK 484

        Choose Frontier Airlines flights from Philadelphia to Seattle. The one-way connecting flight with Frontier Airlines departs from Philadelphia International Airport on Mon, Mar 10, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 484 including taxes and charges.

      • PHL07:45 am
        28h 45m
        1 stop
        SEA09:30 am
        Wed, Mar 5|Philadelphia - Seattle|Frontier Airlines
        DKK 503
        DKK 503

        Choose Frontier Airlines flights from Philadelphia to Seattle. The one-way connecting flight with Frontier Airlines departs from Philadelphia International Airport on Wed, Mar 5, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 503 including taxes and charges.

      • PHL07:45 am
        28h 45m
        1 stop
        SEA09:30 am
        Wed, Mar 19|Philadelphia - Seattle|Frontier Airlines
        DKK 510
        DKK 510

        Choose Frontier Airlines flights from Philadelphia to Seattle. The one-way connecting flight with Frontier Airlines departs from Philadelphia International Airport on Wed, Mar 19, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 510 including taxes and charges.

      • PHL07:45 am
        28h 45m
        1 stop
        SEA09:30 am
        Wed, Mar 12|Philadelphia - Seattle|Frontier Airlines
        DKK 511
        DKK 511

        Choose Frontier Airlines flights from Philadelphia to Seattle. The one-way connecting flight with Frontier Airlines departs from Philadelphia International Airport on Wed, Mar 12, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 511 including taxes and charges.

      • PHL06:40 am
        21h 4m
        1 stop
        SEA12:44 am
        Mon, Apr 21|Philadelphia - Seattle|Frontier Airlines
        DKK 512
        DKK 512

        Choose Frontier Airlines flights from Philadelphia to Seattle. The one-way connecting flight with Frontier Airlines departs from Philadelphia International Airport on Mon, Apr 21, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 512 including taxes and charges.

      • PHL06:45 pm
        26h 15m
        1 stop
        SEA06:00 pm
        Wed, Apr 30|Philadelphia - Seattle|Frontier Airlines
        DKK 513
        DKK 513

        Choose Frontier Airlines flights from Philadelphia to Seattle. The one-way connecting flight with Frontier Airlines departs from Philadelphia International Airport on Wed, Apr 30, arriving at Seattle-Tacoma International Airport. One-way Prices start from DKK 513 including taxes and charges.

      • PHL01:00 pm
        3h 5m
        Nonstop
        SEA02:00 pm
        Sun, Feb 23|Philadelphia - Seattle|Alaska Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Philadelphia to Seattle Flight Time

Flight info.
Departure
Arrival
Weekly Schedule

  1. F92168

    Frontier Airlines

    06:40 am

    PHL

    1.4h

    08:07 am

    BOS

    SM-WT-S
    Search

  2. AS364

    Alaska Airlines

    04:30 pm

    BOS

    6.2h

    07:41 pm

    SEA

    SMTWTFS

  3. F92168

    Frontier Airlines

    06:40 am

    PHL

    1.4h

    08:07 am

    BOS

    SM-WT-S
    Search

  4. B6497

    Jetblue Airways

    05:55 pm

    BOS

    6.5h

    09:25 pm

    SEA

    SMTWTFS

  5. F93265

    Frontier Airlines

    06:42 pm

    PHL

    4.5h

    09:09 pm

    DEN

    S--WT-S
    Search

  6. F93405

    Frontier Airlines

    10:36 pm

    DEN

    3.1h

    12:44 am

    SEA

    S-T-TF-

  7. F93265

    Frontier Airlines

    06:42 pm

    PHL

    4.5h

    09:09 pm

    DEN

    S--WT-S
    Search

  8. F91175

    Frontier Airlines

    01:30 pm

    DEN

    3.2h

    03:41 pm

    SEA

    SMTWTFS

  9. AA2001

    American Airlines

    06:47 pm

    PHL

    6.1h

    Nonstop

    09:54 pm

    SEA

    SMTWT-S
    Search

  10. F91601

    Frontier Airlines

    06:54 pm

    PHL

    5.4h

    09:20 pm

    LAS

    SMTWTFS
    Search

  11. F92407

    Frontier Airlines

    06:00 am

    LAS

    3.0h

    08:57 am

    SEA

    SMTWTFS

  12. AS443

    Alaska Airlines

    06:59 pm

    PHL

    6.0h

    Nonstop

    09:58 pm

    SEA

    SMTWTFS
    Search

  13. UA2383

    United Airlines

    08:00 am

    PHL

    4.3h

    10:17 am

    DEN

    SMTWTFS
    Search

  14. F93405

    Frontier Airlines

    10:36 pm

    DEN

    3.1h

    12:44 am

    SEA

    S-T-TF-

  15. F92297

    Frontier Airlines

    08:36 pm

    PHL

    2.5h

    11:04 pm

    ATL

    -M-WTFS
    Search

  16. F91449

    Frontier Airlines

    09:11 pm

    ATL

    3.8h

    10:58 pm

    DEN

    SMTWTFS

  17. F91175

    Frontier Airlines

    01:30 pm

    DEN

    3.2h

    03:41 pm

    SEA

    SMTWTFS

  18. DL717

    Delta Air Lines

    09:33 am

    PHL

    1.9h

    11:28 am

    DTW

    SMTWT-S
    Search

  19. DL728

    Delta Air Lines

    12:15 pm

    DTW

    5.0h

    02:17 pm

    SEA

    SMTWTFS
Find more flights and airlines

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

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Philadelphia (PHL) to Seattle (SEA) the cheapest?

    Airlines adjust prices for flights from Philadelphia to Seattle based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Philadelphia (PHL) to Seattle (SEA) cost?

    According to Trip.com's data, the lowest price is around DKK 2,318.

  • How long does it take to fly from Philadelphia (PHL) to Seattle (SEA) and what is the distance?

    It takes around 7 hours 24 minutes to fly from Philadelphia (PHL) to Seattle (SEA).

  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17 km. It takes about 30 minutes by taxi.

  • What are the most popular airlines that fly from Philadelphia (PHL) to Seattle (SEA)?

    Airlines with flights from Philadelphia (PHL) to Seattle (SEA): Alaska Airlines, British Airways, Air Tahiti Nui, Hawaiian Airlines, American Airlines, United Airlines and Qatar Airways.

How to find a cheap flight from Philadelphia to Seattle

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Philadelphia to Seattle. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | Philadelphia to Seattle

Cheapest nonstop flight priceDKK 455
Cheapest round-trip ticket priceDKK 1,410
Off-season for travelMarch
Peak season for travelNovember
Flight distance3,816.94 km
Average flight time7 hours 24 minutes
Popular airlineDelta Air Lines

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