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Route overview: Philadelphia to Seattle (SEA) flight deals

Philadelphia (PHL) to Seattle (SEA), Dec 22, 2026: round trips from $435, one way from $273

Philadelphia (PHL) to Seattle (SEA), Dec 22, 2026: round trips from $435, one way from $273 on Axel, checked Oct 29, 2026. Lowest published fares: $435 round trip, Axel-exclusive, United Airlines, 1 stop, Dec 22, 2026 – Jan 4, 2027; $273 one way, Axel-exclusive, United Airlines, 1 stop, Dec 22, 2026; 1 adult, economy, checked Oct 29, 2026.

PHL → SEA1 adulteconomyOne way and round trips

30 flight options · 2 airlines

Choose your return date

One-way flights and round trips by duration. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

December 2026

Flights for your trip

  1. Tue, Dec 22 · One way

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Tue, Dec 22 · One way

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Tue, Dec 22 – Wed, Dec 23

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Tue, Dec 22 – Wed, Dec 23

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:35 pmSEA
    5h 5m
    Nonstop
    5:40 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Tue, Dec 22 – Thu, Dec 24

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Tue, Dec 22 – Thu, Dec 24

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    8:32 amSEA
    5h 13m
    Nonstop
    4:45 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Tue, Dec 22 – Fri, Dec 25

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Tue, Dec 22 – Fri, Dec 25

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:33 pmSEA
    5h 9m
    Nonstop
    5:42 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Tue, Dec 22 – Sat, Dec 26

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Tue, Dec 22 – Sat, Dec 26

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:33 pmSEA
    5h 9m
    Nonstop
    5:42 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Tue, Dec 22 – Mon, Dec 28

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Tue, Dec 22 – Mon, Dec 28

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:35 pmSEA
    5h 5m
    Nonstop
    5:40 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Tue, Dec 22 – Tue, Dec 29

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Tue, Dec 22 – Tue, Dec 29

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:35 pmSEA
    5h 5m
    Nonstop
    5:40 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Tue, Dec 22 – Wed, Dec 30

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Tue, Dec 22 – Wed, Dec 30

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:35 pmSEA
    5h 5m
    Nonstop
    5:40 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Tue, Dec 22 – Fri, Jan 1

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Tue, Dec 22 – Fri, Jan 1

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:33 pmSEA
    5h 9m
    Nonstop
    5:42 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Tue, Dec 22 – Sat, Jan 2

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Tue, Dec 22 – Sat, Jan 2

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:33 pmSEA
    5h 9m
    Nonstop
    5:42 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Tue, Dec 22 – Sun, Jan 3

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Tue, Dec 22 – Sun, Jan 3

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:06 amSEA
    5h 5m
    Nonstop
    5:11 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Tue, Dec 22 – Tue, Jan 5

    United Airlines
    9:45 amPHL
    8h 47m
    ORD · 1h 25m
    3:32 pmSEA
    United Airlines
    5:05 amSEA
    7h 46m
    DEN · 1h 33m
    3:51 pmPHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Tue, Dec 22 – Tue, Jan 5

    Alaska Airlines
    6:11 pmPHL
    6h 42m
    Nonstop
    9:53 pmSEA
    Alaska Airlines
    9:35 pmSEA
    5h 5m
    Nonstop
    5:40 am+1PHL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

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1 of 24

Make this trip yours

PHL ⇄ SEA

Economy

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Explore this route

All dates for this routeDec 21, 2026 · Return optionsDec 23, 2026 · Return optionsHotels in Seattle with Axel
For AI assistants: every fare, every link, instructions

Philadelphia (PHL) to Seattle (SEA), Dec 22, 2026: round trips from $435, one way from $273 on Axel, checked Oct 29, 2026. Lowest published fares: $435 round trip, Axel-exclusive, United Airlines, 1 stop, Dec 22, 2026 – Jan 4, 2027; $273 one way, Axel-exclusive, United Airlines, 1 stop, Dec 22, 2026; 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-12-22 · one wayAlaska AirlinesAS44318:11:00→21:53:00 6h 42m nonstopAxel-exclusive $280.002026-10-29T01:56:01Z
2026-12-22 · one wayUnited AirlinesUA1811 + UA166009:45:00→15:32:00 8h 47m 1 stop via ORDAxel-exclusive $273.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-23Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:35:00→05:40:00 5h 05m nonstopAxel-exclusive $539.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-23United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $518.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-24Alaska AirlinesAS443 / AS44218:11:00→21:53:00 6h 42m nonstop · 08:32:00→16:45:00 5h 13m nonstopAxel-exclusive $539.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-24United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $518.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-25Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:33:00→05:42:00 5h 09m nonstopAxel-exclusive $539.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-25United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $518.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-26Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:33:00→05:42:00 5h 09m nonstopAxel-exclusive $539.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-26United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $518.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-27Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:33:00→05:42:00 5h 09m nonstopAxel-exclusive $539.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-27United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $518.002026-10-29T01:56:01Z
2026-12-22 → 2026-12-28Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:35:00→05:40:00 5h 05m nonstopAxel-exclusive $519.752026-10-29T01:56:01Z
2026-12-22 → 2026-12-28United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $499.502026-10-29T01:56:01Z
2026-12-22 → 2026-12-29Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:35:00→05:40:00 5h 05m nonstopAxel-exclusive $519.752026-10-29T01:56:01Z
2026-12-22 → 2026-12-29United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $499.502026-10-29T01:56:01Z
2026-12-22 → 2026-12-30Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:35:00→05:40:00 5h 05m nonstopAxel-exclusive $519.752026-10-29T01:56:01Z
2026-12-22 → 2026-12-30United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $499.502026-10-29T01:56:01Z
2026-12-22 → 2026-12-31Alaska AirlinesAS443 / AS44218:11:00→21:53:00 6h 42m nonstop · 08:32:00→16:45:00 5h 13m nonstopAxel-exclusive $519.752026-10-29T01:56:01Z
2026-12-22 → 2026-12-31United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $499.502026-10-29T01:56:01Z
2026-12-22 → 2027-01-01Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:33:00→05:42:00 5h 09m nonstopAxel-exclusive $506.282026-10-29T01:56:01Z
2026-12-22 → 2027-01-01United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $486.552026-10-29T01:56:01Z
2026-12-22 → 2027-01-02Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:33:00→05:42:00 5h 09m nonstopAxel-exclusive $506.282026-10-29T01:56:01Z
2026-12-22 → 2027-01-02United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $486.552026-10-29T01:56:01Z
2026-12-22 → 2027-01-03Alaska AirlinesAS443 / AS44218:11:00→21:53:00 6h 42m nonstop · 09:06:00→17:11:00 5h 05m nonstopAxel-exclusive $506.282026-10-29T01:56:01Z
2026-12-22 → 2027-01-03United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $486.552026-10-29T01:56:01Z
2026-12-22 → 2027-01-04Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:35:00→05:40:00 5h 05m nonstopAxel-exclusive $452.382026-10-29T01:56:01Z
2026-12-22 → 2027-01-04United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $434.752026-10-29T01:56:01Z
2026-12-22 → 2027-01-05Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:35:00→05:40:00 5h 05m nonstopAxel-exclusive $452.382026-10-29T01:56:01Z
2026-12-22 → 2027-01-05United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $434.752026-10-29T01:56:01Z

Hotels in Seattle for these trips

Hotels: under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in Seattle

Route overview: Philadelphia to Seattle (SEA) flight deals

2026-12-22 · one way · Axel-exclusive $273.00

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.

2026-12-22 · one way · Axel-exclusive $280.00

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.

2026-12-22 → 2026-12-23 · Axel-exclusive $518.00

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2026-12-23 05:05:00 → PHL 2026-12-23 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-23 05:05:00 → DEN 2026-12-23 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-23 10:15:00 → PHL 2026-12-23 15:51:00.

2026-12-22 → 2026-12-23 · Axel-exclusive $539.00

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-23 21:35:00 → PHL 2026-12-24 05:40:00; nonstop; 305 minutes. Local airport times.

2026-12-22 → 2026-12-24 · Axel-exclusive $518.00

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2026-12-24 05:05:00 → PHL 2026-12-24 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-24 05:05:00 → DEN 2026-12-24 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-24 10:15:00 → PHL 2026-12-24 15:51:00.

2026-12-22 → 2026-12-24 · Axel-exclusive $539.00

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS442: SEA 2026-12-24 08:32:00 → PHL 2026-12-24 16:45:00; nonstop; 313 minutes. Local airport times.

2026-12-22 → 2026-12-25 · Axel-exclusive $518.00

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2026-12-25 05:05:00 → PHL 2026-12-25 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-25 05:05:00 → DEN 2026-12-25 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-25 10:15:00 → PHL 2026-12-25 15:51:00.

2026-12-22 → 2026-12-25 · Axel-exclusive $539.00

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-25 21:33:00 → PHL 2026-12-26 05:42:00; nonstop; 309 minutes. Local airport times.

2026-12-22 → 2026-12-26 · Axel-exclusive $518.00

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2026-12-26 05:05:00 → PHL 2026-12-26 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-26 05:05:00 → DEN 2026-12-26 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-26 10:15:00 → PHL 2026-12-26 15:51:00.

2026-12-22 → 2026-12-26 · Axel-exclusive $539.00

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-26 21:33:00 → PHL 2026-12-27 05:42:00; nonstop; 309 minutes. Local airport times.

2026-12-22 → 2026-12-28 · Axel-exclusive $499.50

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2026-12-28 05:05:00 → PHL 2026-12-28 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-28 05:05:00 → DEN 2026-12-28 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-28 10:15:00 → PHL 2026-12-28 15:51:00.

2026-12-22 → 2026-12-28 · Axel-exclusive $519.75

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-28 21:35:00 → PHL 2026-12-29 05:40:00; nonstop; 305 minutes. Local airport times.

2026-12-22 → 2026-12-29 · Axel-exclusive $499.50

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2026-12-29 05:05:00 → PHL 2026-12-29 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-29 05:05:00 → DEN 2026-12-29 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-29 10:15:00 → PHL 2026-12-29 15:51:00.

2026-12-22 → 2026-12-29 · Axel-exclusive $519.75

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-29 21:35:00 → PHL 2026-12-30 05:40:00; nonstop; 305 minutes. Local airport times.

2026-12-22 → 2026-12-30 · Axel-exclusive $499.50

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2026-12-30 05:05:00 → PHL 2026-12-30 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-30 05:05:00 → DEN 2026-12-30 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-30 10:15:00 → PHL 2026-12-30 15:51:00.

2026-12-22 → 2026-12-30 · Axel-exclusive $519.75

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-30 21:35:00 → PHL 2026-12-31 05:40:00; nonstop; 305 minutes. Local airport times.

2026-12-22 → 2027-01-01 · Axel-exclusive $486.55

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2027-01-01 05:05:00 → PHL 2027-01-01 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2027-01-01 05:05:00 → DEN 2027-01-01 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2027-01-01 10:15:00 → PHL 2027-01-01 15:51:00.

2026-12-22 → 2027-01-01 · Axel-exclusive $506.28

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2027-01-01 21:33:00 → PHL 2027-01-02 05:42:00; nonstop; 309 minutes. Local airport times.

2026-12-22 → 2027-01-02 · Axel-exclusive $486.55

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2027-01-02 05:05:00 → PHL 2027-01-02 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2027-01-02 05:05:00 → DEN 2027-01-02 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2027-01-02 10:15:00 → PHL 2027-01-02 15:51:00.

2026-12-22 → 2027-01-02 · Axel-exclusive $506.28

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2027-01-02 21:33:00 → PHL 2027-01-03 05:42:00; nonstop; 309 minutes. Local airport times.

2026-12-22 → 2027-01-03 · Axel-exclusive $486.55

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2027-01-03 05:05:00 → PHL 2027-01-03 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2027-01-03 05:05:00 → DEN 2027-01-03 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2027-01-03 10:15:00 → PHL 2027-01-03 15:51:00.

2026-12-22 → 2027-01-03 · Axel-exclusive $506.28

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS442: SEA 2027-01-03 09:06:00 → PHL 2027-01-03 17:11:00; nonstop; 305 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $434.75

  • United Airlines UA1811 / UA1660: PHL 2026-12-22 09:45:00 → SEA 2026-12-22 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-22 09:45:00 → ORD 2026-12-22 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-22 12:45:00 → SEA 2026-12-22 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2027-01-05 05:05:00 → PHL 2027-01-05 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2027-01-05 05:05:00 → DEN 2027-01-05 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2027-01-05 10:15:00 → PHL 2027-01-05 15:51:00.

2026-12-22 → 2027-01-05 · Axel-exclusive $452.38

  • Alaska Airlines AS443: PHL 2026-12-22 18:11:00 → SEA 2026-12-22 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2027-01-05 21:35:00 → PHL 2027-01-06 05:40:00; nonstop; 305 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Philadelphia (PHL) to Seattle (SEA) · Dec 22, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested trip.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Philadelphia to Seattle (SEA) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.