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Philadelphia → Seattle

Dec 21, 2026 · return Dec 28, 2026

PHL → SEA1 adulteconomyRound trip

11 flight options · 5 airlines

Nonstop flights

Mon, Dec 21 – Mon, Dec 28

Alaska Airlines
6:46 pmPHL
6h 10m
Nonstop
9:56 pmSEA
Alaska Airlines
9:05 amSEA
5h 3m
Nonstop
5:08 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Dec 28

American Airlines
7:00 pmPHL
6h 38m
Nonstop
10:38 pmSEA
American Airlines
12:34 pmSEA
5h 1m
Nonstop
8:35 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Dec 28

Delta Air Lines
7:00 amPHL
6h 5m
Nonstop
10:05 amSEA
Delta Air Lines
9:38 pmSEA
5h 5m
Nonstop
5:43 am+1PHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Dec 28

Alaska Airlines
7:00 amPHL
6h 28m
Nonstop
10:28 amSEA
Alaska Airlines
9:05 amSEA
5h 3m
Nonstop
5:08 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Dec 28

American Airlines
8:27 amPHL
6h 25m
Nonstop
11:52 amSEA
American Airlines
12:34 pmSEA
5h 1m
Nonstop
8:35 pmPHL

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Mon, Dec 28

Southwest Airlines
5:15 pmPHL
8h 35m
DEN · 1h 15m
10:50 pmSEA
Southwest Airlines
6:30 amSEA
7h
MDW · 1h 10m
4:30 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – 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

Mon, Dec 21 – Mon, Dec 28

Southwest Airlines
6:20 pmPHL
8h 15m
MDW · 1h 10m
11:35 pmSEA
Southwest Airlines
6:30 amSEA
7h
MDW · 1h 10m
4:30 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Dec 28

Delta Air Lines
7:15 amPHL
8h 21m
SLC · 1h
12:36 pmSEA
Delta Air Lines
9:38 pmSEA
5h 5m
Nonstop
5:43 am+1PHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Dec 28

Delta Air Lines
9:43 amPHL
8h 12m
DTW · 1h 18m
2:55 pmSEA
Delta Air Lines
9:38 pmSEA
5h 5m
Nonstop
5:43 am+1PHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Dec 28

Delta Air Lines
5:34 amPHL
8h 8m
MSP · 1h 10m
10:42 amSEA
Delta Air Lines
9:38 pmSEA
5h 5m
Nonstop
5:43 am+1PHL

Round-trip total · 1 adult · Taxes included

Make this trip yours

PHL ⇄ SEA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 → 2026-12-28Alaska AirlinesAS443 / AS442$519.752026-10-29T01:56:01Z
2026-12-21 → 2026-12-28American AirlinesAA2500 / AA2203$540.002026-10-29T01:56:01Z
2026-12-21 → 2026-12-28Delta Air LinesDL2092 / DL1114$553.502026-10-29T01:56:01Z
2026-12-21 → 2026-12-28Southwest AirlinesWN1270 + WN3141 / WN1550 + WN1623$492.752026-10-29T01:56:01Z
2026-12-21 → 2026-12-28United AirlinesUA1811 + UA1660 / UA1686 + UA225$499.502026-10-29T01:56:01Z
2026-12-21 → 2026-12-28Alaska AirlinesAS370 / AS442$519.752026-10-29T01:56:01Z
2026-12-21 → 2026-12-28American AirlinesAA2311 / AA2203$540.002026-10-29T01:56:01Z
2026-12-21 → 2026-12-28Southwest AirlinesWN2108 + WN3032 / WN1550 + WN1623$492.752026-10-29T01:56:01Z
2026-12-21 → 2026-12-28Delta Air LinesDL2023 + DL2995 / DL1114$529.002026-10-29T01:56:01Z
2026-12-21 → 2026-12-28Delta Air LinesDL2968 + DL728 / DL1114$529.002026-10-29T01:56:01Z
2026-12-21 → 2026-12-28Delta Air LinesDL2791 + DL868 / DL1114$529.002026-10-29T01:56:01Z

2026-12-21 → 2026-12-28 · $519.75

  • Alaska Airlines AS443: PHL 2026-12-21 18:46:00 → SEA 2026-12-21 21:56:00; nonstop; 370 minutes. Local airport times.
  • Alaska Airlines AS442: SEA 2026-12-28 09:05:00 → PHL 2026-12-28 17:08:00; nonstop; 303 minutes. Local airport times.

2026-12-21 → 2026-12-28 · $540.00

  • American Airlines AA2500: PHL 2026-12-21 19:00:00 → SEA 2026-12-21 22:38:00; nonstop; 398 minutes. Local airport times.
  • American Airlines AA2203: SEA 2026-12-28 12:34:00 → PHL 2026-12-28 20:35:00; nonstop; 301 minutes. Local airport times.

2026-12-21 → 2026-12-28 · $553.50

  • Delta Air Lines DL2092: PHL 2026-12-21 07:00:00 → SEA 2026-12-21 10:05:00; nonstop; 365 minutes. Local airport times.
  • Delta Air Lines DL1114: SEA 2026-12-28 21:38:00 → PHL 2026-12-29 05:43:00; nonstop; 305 minutes. Local airport times.

2026-12-21 → 2026-12-28 · $492.75

  • Southwest Airlines WN1270 / WN3141: PHL 2026-12-21 17:15:00 → SEA 2026-12-21 22:50:00; 1 stop(s) via DEN; 515 minutes. Local airport times.
    • WN1270: PHL 2026-12-21 17:15:00 → DEN 2026-12-21 19:25:00; layover at DEN: 75 minutes.
    • WN3141: DEN 2026-12-21 20:40:00 → SEA 2026-12-21 22:50:00.
  • Southwest Airlines WN1550 / WN1623: SEA 2026-12-28 06:30:00 → PHL 2026-12-28 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-12-28 06:30:00 → MDW 2026-12-28 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-12-28 13:35:00 → PHL 2026-12-28 16:30:00.

2026-12-21 → 2026-12-28 · $499.50

  • United Airlines UA1811 / UA1660: PHL 2026-12-21 09:45:00 → SEA 2026-12-21 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-21 09:45:00 → ORD 2026-12-21 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-21 12:45:00 → SEA 2026-12-21 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.

2026-12-21 → 2026-12-28 · $519.75

  • Alaska Airlines AS370: PHL 2026-12-21 07:00:00 → SEA 2026-12-21 10:28:00; nonstop; 388 minutes. Local airport times.
  • Alaska Airlines AS442: SEA 2026-12-28 09:05:00 → PHL 2026-12-28 17:08:00; nonstop; 303 minutes. Local airport times.

2026-12-21 → 2026-12-28 · $540.00

  • American Airlines AA2311: PHL 2026-12-21 08:27:00 → SEA 2026-12-21 11:52:00; nonstop; 385 minutes. Local airport times.
  • American Airlines AA2203: SEA 2026-12-28 12:34:00 → PHL 2026-12-28 20:35:00; nonstop; 301 minutes. Local airport times.

2026-12-21 → 2026-12-28 · $492.75

  • Southwest Airlines WN2108 / WN3032: PHL 2026-12-21 18:20:00 → SEA 2026-12-21 23:35:00; 1 stop(s) via MDW; 495 minutes. Local airport times.
    • WN2108: PHL 2026-12-21 18:20:00 → MDW 2026-12-21 19:35:00; layover at MDW: 70 minutes.
    • WN3032: MDW 2026-12-21 20:45:00 → SEA 2026-12-21 23:35:00.
  • Southwest Airlines WN1550 / WN1623: SEA 2026-12-28 06:30:00 → PHL 2026-12-28 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-12-28 06:30:00 → MDW 2026-12-28 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-12-28 13:35:00 → PHL 2026-12-28 16:30:00.

2026-12-21 → 2026-12-28 · $529.00

  • Delta Air Lines DL2023 / DL2995: PHL 2026-12-21 07:15:00 → SEA 2026-12-21 12:36:00; 1 stop(s) via SLC; 501 minutes. Local airport times.
    • DL2023: PHL 2026-12-21 07:15:00 → SLC 2026-12-21 10:15:00; layover at SLC: 60 minutes.
    • DL2995: SLC 2026-12-21 11:15:00 → SEA 2026-12-21 12:36:00.
  • Delta Air Lines DL1114: SEA 2026-12-28 21:38:00 → PHL 2026-12-29 05:43:00; nonstop; 305 minutes. Local airport times.

2026-12-21 → 2026-12-28 · $529.00

  • Delta Air Lines DL2968 / DL728: PHL 2026-12-21 09:43:00 → SEA 2026-12-21 14:55:00; 1 stop(s) via DTW; 492 minutes. Local airport times.
    • DL2968: PHL 2026-12-21 09:43:00 → DTW 2026-12-21 11:35:00; layover at DTW: 78 minutes.
    • DL728: DTW 2026-12-21 12:53:00 → SEA 2026-12-21 14:55:00.
  • Delta Air Lines DL1114: SEA 2026-12-28 21:38:00 → PHL 2026-12-29 05:43:00; nonstop; 305 minutes. Local airport times.

2026-12-21 → 2026-12-28 · $529.00

  • Delta Air Lines DL2791 / DL868: PHL 2026-12-21 05:34:00 → SEA 2026-12-21 10:42:00; 1 stop(s) via MSP; 488 minutes. Local airport times.
    • DL2791: PHL 2026-12-21 05:34:00 → MSP 2026-12-21 07:35:00; layover at MSP: 70 minutes.
    • DL868: MSP 2026-12-21 08:45:00 → SEA 2026-12-21 10:42:00.
  • Delta Air Lines DL1114: SEA 2026-12-28 21:38:00 → PHL 2026-12-29 05:43:00; nonstop; 305 minutes. Local airport times.

More dates for this route