App
Customer Support
NZD
Find Bookings
Trip.com
>
Cheap Flights
>
United States
>
Philadelphia
>
Flights from Seattle to Philadelphia
Worldwide Coverage
Worldwide Coverage
Flights to over 5,000 cities
One-stop Service Guarantee
One-stop Service Guarantee
Price guaranteed upon confirmed payment, booking guaranteed once tickets issued
Secure Payment
Secure Payment
Convenient & reliable booking and payment system

Flights from Seattle to Philadelphia Starting at NZD 105

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

  • One way
  • Round-trip
      • Cheapest nonstop
        SEA09:15
        5h 10m
        Nonstop
        PHL17:25
        Wed, Feb 26|Seattle - Philadelphia|Alaska Airlines
        NZD 237NZD 275
        14% OFF
        14% OFF
        NZD 275NZD 237

        Choose Alaska Airlines flights from Seattle to Philadelphia. The one-way direct flight with Alaska Airlines departs from Seattle-Tacoma International Airport on Wed, Feb 26, arriving at Philadelphia International Airport. One-way Prices start from NZD 237 including taxes and charges.

      • SEA09:15
        5h 10m
        Nonstop
        PHL17:25
        Tue, Feb 25|Seattle - Philadelphia|Alaska Airlines
        NZD 245NZD 275
        11% OFF
        11% OFF
        NZD 275NZD 245

        Choose Alaska Airlines flights from Seattle to Philadelphia. The one-way direct flight with Alaska Airlines departs from Seattle-Tacoma International Airport on Tue, Feb 25, arriving at Philadelphia International Airport. One-way Prices start from NZD 245 including taxes and charges.

      • SEA13:36
        11h 49m
        1 stop
        PHL04:25
        Wed, Mar 5|Seattle - Philadelphia|Frontier Airlines
        NZD 105NZD 275
        62% OFF
        62% OFF
        NZD 275NZD 105

        Choose Frontier Airlines flights from Seattle to Philadelphia. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Wed, Mar 5, arriving at Philadelphia International Airport. One-way Prices start from NZD 105 including taxes and charges.

      • SEA11:48
        15h 26m
        1 stop
        PHL06:14
        Tue, Mar 11|Seattle - Philadelphia|Frontier Airlines
        NZD 106
        NZD 106

        Choose Frontier Airlines flights from Seattle to Philadelphia. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Tue, Mar 11, arriving at Philadelphia International Airport. One-way Prices start from NZD 106 including taxes and charges.

      • SEA13:36
        19h 3m
        1 stop
        PHL11:39
        Wed, Feb 12|Seattle - Philadelphia|Frontier Airlines
        NZD 124
        NZD 124

        Choose Frontier Airlines flights from Seattle to Philadelphia. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Wed, Feb 12, arriving at Philadelphia International Airport. One-way Prices start from NZD 124 including taxes and charges.

      • SEA13:36
        19h 3m
        1 stop
        PHL11:39
        Wed, Feb 26|Seattle - Philadelphia|Frontier Airlines
        NZD 126
        NZD 126

        Choose Frontier Airlines flights from Seattle to Philadelphia. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Wed, Feb 26, arriving at Philadelphia International Airport. One-way Prices start from NZD 126 including taxes and charges.

      • SEA15:48
        11h 26m
        1 stop
        PHL06:14
        Tue, Feb 25|Seattle - Philadelphia|Frontier Airlines
        NZD 127
        NZD 127

        Choose Frontier Airlines flights from Seattle to Philadelphia. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Tue, Feb 25, arriving at Philadelphia International Airport. One-way Prices start from NZD 127 including taxes and charges.

      • SEA15:03
        13h 35m
        1 stop
        PHL07:38
        Sat, Mar 1|Seattle - Philadelphia|Frontier Airlines
        NZD 127
        NZD 127

        Choose Frontier Airlines flights from Seattle to Philadelphia. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Sat, Mar 1, arriving at Philadelphia International Airport. One-way Prices start from NZD 127 including taxes and charges.

      • SEA15:48
        11h 26m
        1 stop
        PHL06:14
        Tue, Mar 4|Seattle - Philadelphia|Frontier Airlines
        NZD 129
        NZD 129

        Choose Frontier Airlines flights from Seattle to Philadelphia. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Tue, Mar 4, arriving at Philadelphia International Airport. One-way Prices start from NZD 129 including taxes and charges.

      • SEA11:13
        16h 6m
        1 stop
        PHL06:19
        Mon, Mar 3|Seattle - Philadelphia|Frontier Airlines
        NZD 130
        NZD 130

        Choose Frontier Airlines flights from Seattle to Philadelphia. The one-way connecting flight with Frontier Airlines departs from Seattle-Tacoma International Airport on Mon, Mar 3, arriving at Philadelphia International Airport. One-way Prices start from NZD 130 including taxes and charges.

      • SEA01:00 pm
        3h 5m
        Nonstop
        PHL02:00 pm
        Thu, Feb 13|Seattle - Philadelphia|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.

Seattle to Philadelphia flight time & flight schedules

Flight info.
Departure
Arrival
Weekly Schedule

  1. F93406

    Frontier Airlines

    06:00

    SEA

    2.9h

    09:51

    DEN

    SMTWTFS
    Search

  2. F91114

    Frontier Airlines

    23:59

    DEN

    3.6h

    05:34

    TPA

    SMTWTFS

  3. F94172

    Frontier Airlines

    20:54

    TPA

    2.8h

    23:39

    TTN

    SMTWT-S

  4. F93406

    Frontier Airlines

    06:00

    SEA

    2.9h

    09:51

    DEN

    SMTWTFS
    Search

  5. F93340

    Frontier Airlines

    23:45

    DEN

    3.4h

    05:09

    PHL

    S--WTFS

  6. DL569

    Delta Air Lines

    06:00

    SEA

    4.7h

    13:40

    ATL

    SMTWTFS
    Search

  7. DL2131

    Delta Air Lines

    13:54

    ATL

    2.0h

    15:56

    PHL

    SMTWTFS

  8. DL812

    Delta Air Lines

    06:05

    SEA

    4.2h

    13:15

    DTW

    SMTWTFS
    Search

  9. DL733

    Delta Air Lines

    14:25

    DTW

    1.7h

    16:05

    PHL

    SMTWTFS

  10. AS442

    Alaska Airlines

    09:37

    SEA

    5.3h

    Nonstop

    17:53

    PHL

    SMTWTFS
    Search

  11. AS602

    Alaska Airlines

    15:17

    SEA

    2.7h

    18:57

    DEN

    SMTWTFS
    Search

  12. F93340

    Frontier Airlines

    23:45

    DEN

    3.4h

    05:09

    PHL

    S--WTFS

  13. F94830

    Frontier Airlines

    20:22

    SEA

    2.7h

    23:03

    LAS

    S--WT-S
    Search

  14. F91602

    Frontier Airlines

    23:00

    LAS

    4.9h

    06:52

    PHL

    --T----

  15. F94830

    Frontier Airlines

    20:22

    SEA

    2.7h

    23:03

    LAS

    S--WT-S
    Search

  16. F91116

    Frontier Airlines

    23:03

    LAS

    4.2h

    06:13

    ATL

    SMTWTFS

  17. F93210

    Frontier Airlines

    12:29

    ATL

    2.2h

    14:39

    PHL

    SMTWTFS

  18. AS520

    Alaska Airlines

    21:40

    SEA

    6.0h

    06:43

    FLL

    SMTWTFS
    Search

  19. F92610

    Frontier Airlines

    15:57

    FLL

    3.0h

    18:54

    PHL

    SMTWTFS

  20. DL810

    Delta Air Lines

    22:55

    SEA

    4.2h

    06:09

    DTW

    SMTWTFS
    Search

  21. DL717

    Delta Air Lines

    07:00

    DTW

    1.8h

    08:48

    PHL

    SMTWTFS
Find more flights and airlines

Find the best time to fly from Seattle to Philadelphia

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.

Airlines Flying from Seattle to Philadelphia

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.
Alaska Airlines logoAlaska AirlinesDelta Air Lines logoDelta Air LinesAmerican Airlines logoAmerican AirlinesJetblue Airways logoJetblue Airways

FAQ

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

    Airlines adjust prices for flights from Seattle to Philadelphia 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 Seattle (SEA) to Philadelphia (PHL) cost?

    According to Trip.com's data, the lowest price is around NZD 550.

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

    It takes around 5 hours 10 minutes to fly from Seattle (SEA) to Philadelphia (PHL).

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

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

How to find a cheap flight from Seattle to Philadelphia

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 Seattle to Philadelphia. 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 Information from Seattle to Philadelphia

Cheapest nonstop flight priceNZD 105
Cheapest round-trip ticket priceNZD 356
Off-season for travelMarch
Peak season for travelMay
Flight distance3,816.94 km
Average flight time5 hours 10 minutes
Popular airlineAlaska Airlines

Contact Us

About

Other Services

Payment Methods
Our Partners
Copyright © 2025 Trip.com Travel Singapore Pte. Ltd. All rights reserved
Site Operator: Trip.com Travel Singapore Pte. Ltd.