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Seattle → Philadelphia

Dec 4, 2026 · return Dec 7, 2026

SEA → PHL1 adulteconomyRound trip

11 flight options · 5 airlines

Nonstop flights

Fri, Dec 4 – Mon, Dec 7

Alaska Airlines
9:35 pmSEA
5h 5m
Nonstop
5:40 am+1PHL
Alaska Airlines
7:00 amPHL
6h 28m
Nonstop
10:28 amSEA

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

American Airlines
11:17 pmSEA
5h 2m
Nonstop
7:19 am+1PHL
American Airlines
7:00 pmPHL
6h 38m
Nonstop
10:38 pmSEA

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

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

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

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

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

American Airlines
12:42 pmSEA
5h 2m
Nonstop
8:44 pmPHL
American Airlines
7:00 pmPHL
6h 38m
Nonstop
10:38 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Fri, Dec 4 – Mon, Dec 7

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

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

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

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

Alaska Airlines
11:40 pmSEA
7h 10m
ORD · 1h 8m
9:50 am+1PHL
Alaska Airlines
7:00 amPHL
6h 28m
Nonstop
10:28 amSEA

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

Delta Air Lines
6:00 amSEA
7h 35m
DTW · 1h 47m
4:35 pmPHL
Delta Air Lines
7:00 amPHL
6h 5m
Nonstop
10:05 amSEA

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

Delta Air Lines
1:50 pmSEA
7h 4m
MSP · 1h 9m
11:54 pmPHL
Delta Air Lines
7:00 amPHL
6h 5m
Nonstop
10:05 amSEA

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Mon, Dec 7

Delta Air Lines
10:40 pmSEA
7h 51m
ATL · 1h 18m
9:31 am+1PHL
Delta Air Lines
7:00 amPHL
6h 5m
Nonstop
10:05 amSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ PHL

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 5, 2026 → Nov 8, 2026Nov 14, 2026 → Nov 21, 2026Nov 24, 2026 → Nov 29, 2026Dec 5, 2026 → Dec 12, 2026Dec 17, 2026 → Dec 20, 2026Dec 26, 2026 → Jan 2, 2027Jan 5, 2027 · One wayJan 16, 2027 → Jan 23, 2027Feb 5, 2027 → Feb 8, 2027Apr 3, 2027 → Apr 10, 2027Jun 26, 2027 → Jul 3, 2027Sep 17, 2027 → Sep 20, 2027
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)
2026-12-04 → 2026-12-07Alaska AirlinesAS371 / AS370$395.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07American AirlinesAA2500 / AA2500$410.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07Delta Air LinesDL1114 / DL2092$430.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07Southwest AirlinesWN1550 + WN1623 / WN2108 + WN3032$365.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07United AirlinesUA1686 + UA225 / UA1811 + UA1660$375.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07Alaska AirlinesAS442 / AS370$395.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07American AirlinesAA467 / AA2500$410.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07Alaska AirlinesAS328 + AA970 / AS370$375.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07Delta Air LinesDL812 + DL1391 / DL2092$405.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07Delta Air LinesDL942 + DL2703 / DL2092$405.002026-10-29T01:16:02Z
2026-12-04 → 2026-12-07Delta Air LinesDL567 + DL1100 / DL2092$405.002026-10-29T01:16:02Z

2026-12-04 → 2026-12-07 · $395.00

  • Alaska Airlines AS371: SEA 2026-12-04 21:35:00 → PHL 2026-12-05 05:40:00; nonstop; 305 minutes. Local airport times.
  • Alaska Airlines AS370: PHL 2026-12-07 07:00:00 → SEA 2026-12-07 10:28:00; nonstop; 388 minutes. Local airport times.

2026-12-04 → 2026-12-07 · $410.00

  • American Airlines AA2500: SEA 2026-12-04 23:17:00 → PHL 2026-12-05 07:19:00; nonstop; 302 minutes. Local airport times.
  • American Airlines AA2500: PHL 2026-12-07 19:00:00 → SEA 2026-12-07 22:38:00; nonstop; 398 minutes. Local airport times.

2026-12-04 → 2026-12-07 · $430.00

  • Delta Air Lines DL1114: SEA 2026-12-04 21:38:00 → PHL 2026-12-05 05:43:00; nonstop; 305 minutes. Local airport times.
  • Delta Air Lines DL2092: PHL 2026-12-07 07:00:00 → SEA 2026-12-07 10:05:00; nonstop; 365 minutes. Local airport times.

2026-12-04 → 2026-12-07 · $365.00

  • Southwest Airlines WN1550 / WN1623: SEA 2026-12-04 06:30:00 → PHL 2026-12-04 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-12-04 06:30:00 → MDW 2026-12-04 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-12-04 13:35:00 → PHL 2026-12-04 16:30:00.
  • Southwest Airlines WN2108 / WN3032: PHL 2026-12-07 18:20:00 → SEA 2026-12-07 23:35:00; 1 stop(s) via MDW; 495 minutes. Local airport times.
    • WN2108: PHL 2026-12-07 18:20:00 → MDW 2026-12-07 19:35:00; layover at MDW: 70 minutes.
    • WN3032: MDW 2026-12-07 20:45:00 → SEA 2026-12-07 23:35:00.

2026-12-04 → 2026-12-07 · $375.00

  • United Airlines UA1686 / UA225: SEA 2026-12-04 05:05:00 → PHL 2026-12-04 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-04 05:05:00 → DEN 2026-12-04 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-04 10:15:00 → PHL 2026-12-04 15:51:00.
  • United Airlines UA1811 / UA1660: PHL 2026-12-07 09:45:00 → SEA 2026-12-07 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-07 09:45:00 → ORD 2026-12-07 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-07 12:45:00 → SEA 2026-12-07 15:32:00.

2026-12-04 → 2026-12-07 · $395.00

  • Alaska Airlines AS442: SEA 2026-12-04 09:05:00 → PHL 2026-12-04 17:08:00; nonstop; 303 minutes. Local airport times.
  • Alaska Airlines AS370: PHL 2026-12-07 07:00:00 → SEA 2026-12-07 10:28:00; nonstop; 388 minutes. Local airport times.

2026-12-04 → 2026-12-07 · $410.00

  • American Airlines AA467: SEA 2026-12-04 12:42:00 → PHL 2026-12-04 20:44:00; nonstop; 302 minutes. Local airport times.
  • American Airlines AA2500: PHL 2026-12-07 19:00:00 → SEA 2026-12-07 22:38:00; nonstop; 398 minutes. Local airport times.

2026-12-04 → 2026-12-07 · $375.00

  • Alaska Airlines AS328 / AA970: SEA 2026-12-04 23:40:00 → PHL 2026-12-05 09:50:00; 1 stop(s) via ORD; 430 minutes. Local airport times.
    • AS328: SEA 2026-12-04 23:40:00 → ORD 2026-12-05 05:37:00; layover at ORD: 68 minutes.
    • AA970: ORD 2026-12-05 06:45:00 → PHL 2026-12-05 09:50:00.
  • Alaska Airlines AS370: PHL 2026-12-07 07:00:00 → SEA 2026-12-07 10:28:00; nonstop; 388 minutes. Local airport times.

2026-12-04 → 2026-12-07 · $405.00

  • Delta Air Lines DL812 / DL1391: SEA 2026-12-04 06:00:00 → PHL 2026-12-04 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
    • DL812: SEA 2026-12-04 06:00:00 → DTW 2026-12-04 13:12:00; layover at DTW: 107 minutes.
    • DL1391: DTW 2026-12-04 14:59:00 → PHL 2026-12-04 16:35:00.
  • Delta Air Lines DL2092: PHL 2026-12-07 07:00:00 → SEA 2026-12-07 10:05:00; nonstop; 365 minutes. Local airport times.

2026-12-04 → 2026-12-07 · $405.00

  • Delta Air Lines DL942 / DL2703: SEA 2026-12-04 13:50:00 → PHL 2026-12-04 23:54:00; 1 stop(s) via MSP; 424 minutes. Local airport times.
    • DL942: SEA 2026-12-04 13:50:00 → MSP 2026-12-04 19:11:00; layover at MSP: 69 minutes.
    • DL2703: MSP 2026-12-04 20:20:00 → PHL 2026-12-04 23:54:00.
  • Delta Air Lines DL2092: PHL 2026-12-07 07:00:00 → SEA 2026-12-07 10:05:00; nonstop; 365 minutes. Local airport times.

2026-12-04 → 2026-12-07 · $405.00

  • Delta Air Lines DL567 / DL1100: SEA 2026-12-04 22:40:00 → PHL 2026-12-05 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
    • DL567: SEA 2026-12-04 22:40:00 → ATL 2026-12-05 06:12:00; layover at ATL: 78 minutes.
    • DL1100: ATL 2026-12-05 07:30:00 → PHL 2026-12-05 09:31:00.
  • Delta Air Lines DL2092: PHL 2026-12-07 07:00:00 → SEA 2026-12-07 10:05:00; nonstop; 365 minutes. Local airport times.

More dates for this route