Travel with Axel,
get the best price.

Philadelphia → Seattle

Nov 21, 2026 · return Dec 5, 2026

PHL → SEA1 adulteconomyRound trip

10 flight options · 4 airlines

Nonstop flights

Sat, Nov 21 – Sat, Dec 5

Alaska Airlines
7:02 amPHL
6h 27m
Nonstop
10:29 amSEA
Alaska Airlines
9:34 pmSEA
5h 6m
Nonstop
5:40 am+1PHL

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

American Airlines
6:48 pmPHL
6h 29m
Nonstop
10:17 pmSEA
American Airlines
11:17 pmSEA
5h 2m
Nonstop
7:19 am+1PHL

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

Alaska Airlines
6:46 pmPHL
6h 10m
Nonstop
9:56 pmSEA
Alaska Airlines
9:34 pmSEA
5h 6m
Nonstop
5:40 am+1PHL

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

American Airlines
8:27 amPHL
6h 25m
Nonstop
11:52 amSEA
American Airlines
11:17 pmSEA
5h 2m
Nonstop
7:19 am+1PHL

Round-trip total · 1 adult · Taxes included

One-stop flights

Sat, Nov 21 – Sat, Dec 5

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

Sat, Nov 21 – Sat, Dec 5

Delta Air Lines
9:43 amPHL
8h 12m
DTW · 1h 18m
2:55 pmSEA
Delta Air Lines
10:40 pmSEA
7h 51m
ATL · 1h 18m
9:31 am+1PHL

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

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

Sat, Nov 21 – Sat, Dec 5

Delta Air Lines
7:15 amPHL
8h 21m
SLC · 1h
12:36 pmSEA
Delta Air Lines
10:40 pmSEA
7h 51m
ATL · 1h 18m
9:31 am+1PHL

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

Delta Air Lines
5:34 amPHL
8h 8m
MSP · 1h 10m
10:42 amSEA
Delta Air Lines
10:40 pmSEA
7h 51m
ATL · 1h 18m
9:31 am+1PHL

Round-trip total · 1 adult · Taxes included

Sat, Nov 21 – Sat, Dec 5

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

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Alaska Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

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)
2026-11-21 → 2026-12-05Alaska AirlinesAS370 / AS371$452.382026-10-29T01:56:01Z
2026-11-21 → 2026-12-05American AirlinesAA2500 / AA2500$470.002026-10-29T01:56:01Z
2026-11-21 → 2026-12-05Southwest AirlinesWN2108 + WN3032 / WN1550 + WN1623$428.882026-10-29T01:56:01Z
2026-11-21 → 2026-12-05Delta Air LinesDL2968 + DL728 / DL567 + DL1100$440.632026-10-29T01:56:01Z
2026-11-21 → 2026-12-05Alaska AirlinesAS443 / AS371$452.382026-10-29T01:56:01Z
2026-11-21 → 2026-12-05American AirlinesAA2311 / AA2500$470.002026-10-29T01:56:01Z
2026-11-21 → 2026-12-05Southwest AirlinesWN1270 + WN3141 / WN1550 + WN1623$428.882026-10-29T01:56:01Z
2026-11-21 → 2026-12-05Delta Air LinesDL2023 + DL2995 / DL567 + DL1100$440.632026-10-29T01:56:01Z
2026-11-21 → 2026-12-05Delta Air LinesDL2791 + DL868 / DL567 + DL1100$440.632026-10-29T01:56:01Z
2026-11-21 → 2026-12-05Delta Air LinesDL2092 / DL567 + DL1100$464.252026-10-29T01:56:01Z

2026-11-21 → 2026-12-05 · $452.38

  • Alaska Airlines AS370: PHL 2026-11-21 07:02:00 → SEA 2026-11-21 10:29:00; nonstop; 387 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-05 21:34:00 → PHL 2026-12-06 05:40:00; nonstop; 306 minutes. Local airport times.

2026-11-21 → 2026-12-05 · $470.00

  • American Airlines AA2500: PHL 2026-11-21 18:48:00 → SEA 2026-11-21 22:17:00; nonstop; 389 minutes. Local airport times.
  • American Airlines AA2500: SEA 2026-12-05 23:17:00 → PHL 2026-12-06 07:19:00; nonstop; 302 minutes. Local airport times.

2026-11-21 → 2026-12-05 · $428.88

  • Southwest Airlines WN2108 / WN3032: PHL 2026-11-21 18:20:00 → SEA 2026-11-21 23:35:00; 1 stop(s) via MDW; 495 minutes. Local airport times.
    • WN2108: PHL 2026-11-21 18:20:00 → MDW 2026-11-21 19:35:00; layover at MDW: 70 minutes.
    • WN3032: MDW 2026-11-21 20:45:00 → SEA 2026-11-21 23:35:00.
  • Southwest Airlines WN1550 / WN1623: SEA 2026-12-05 06:30:00 → PHL 2026-12-05 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-12-05 06:30:00 → MDW 2026-12-05 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-12-05 13:35:00 → PHL 2026-12-05 16:30:00.

2026-11-21 → 2026-12-05 · $440.63

  • Delta Air Lines DL2968 / DL728: PHL 2026-11-21 09:43:00 → SEA 2026-11-21 14:55:00; 1 stop(s) via DTW; 492 minutes. Local airport times.
    • DL2968: PHL 2026-11-21 09:43:00 → DTW 2026-11-21 11:35:00; layover at DTW: 78 minutes.
    • DL728: DTW 2026-11-21 12:53:00 → SEA 2026-11-21 14:55:00.
  • Delta Air Lines DL567 / DL1100: SEA 2026-12-05 22:40:00 → PHL 2026-12-06 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
    • DL567: SEA 2026-12-05 22:40:00 → ATL 2026-12-06 06:12:00; layover at ATL: 78 minutes.
    • DL1100: ATL 2026-12-06 07:30:00 → PHL 2026-12-06 09:31:00.

2026-11-21 → 2026-12-05 · $452.38

  • Alaska Airlines AS443: PHL 2026-11-21 18:46:00 → SEA 2026-11-21 21:56:00; nonstop; 370 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-05 21:34:00 → PHL 2026-12-06 05:40:00; nonstop; 306 minutes. Local airport times.

2026-11-21 → 2026-12-05 · $470.00

  • American Airlines AA2311: PHL 2026-11-21 08:27:00 → SEA 2026-11-21 11:52:00; nonstop; 385 minutes. Local airport times.
  • American Airlines AA2500: SEA 2026-12-05 23:17:00 → PHL 2026-12-06 07:19:00; nonstop; 302 minutes. Local airport times.

2026-11-21 → 2026-12-05 · $428.88

  • Southwest Airlines WN1270 / WN3141: PHL 2026-11-21 17:15:00 → SEA 2026-11-21 22:50:00; 1 stop(s) via DEN; 515 minutes. Local airport times.
    • WN1270: PHL 2026-11-21 17:15:00 → DEN 2026-11-21 19:25:00; layover at DEN: 75 minutes.
    • WN3141: DEN 2026-11-21 20:40:00 → SEA 2026-11-21 22:50:00.
  • Southwest Airlines WN1550 / WN1623: SEA 2026-12-05 06:30:00 → PHL 2026-12-05 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-12-05 06:30:00 → MDW 2026-12-05 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-12-05 13:35:00 → PHL 2026-12-05 16:30:00.

2026-11-21 → 2026-12-05 · $440.63

  • Delta Air Lines DL2023 / DL2995: PHL 2026-11-21 07:15:00 → SEA 2026-11-21 12:36:00; 1 stop(s) via SLC; 501 minutes. Local airport times.
    • DL2023: PHL 2026-11-21 07:15:00 → SLC 2026-11-21 10:15:00; layover at SLC: 60 minutes.
    • DL2995: SLC 2026-11-21 11:15:00 → SEA 2026-11-21 12:36:00.
  • Delta Air Lines DL567 / DL1100: SEA 2026-12-05 22:40:00 → PHL 2026-12-06 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
    • DL567: SEA 2026-12-05 22:40:00 → ATL 2026-12-06 06:12:00; layover at ATL: 78 minutes.
    • DL1100: ATL 2026-12-06 07:30:00 → PHL 2026-12-06 09:31:00.

2026-11-21 → 2026-12-05 · $440.63

  • Delta Air Lines DL2791 / DL868: PHL 2026-11-21 05:34:00 → SEA 2026-11-21 10:42:00; 1 stop(s) via MSP; 488 minutes. Local airport times.
    • DL2791: PHL 2026-11-21 05:34:00 → MSP 2026-11-21 07:35:00; layover at MSP: 70 minutes.
    • DL868: MSP 2026-11-21 08:45:00 → SEA 2026-11-21 10:42:00.
  • Delta Air Lines DL567 / DL1100: SEA 2026-12-05 22:40:00 → PHL 2026-12-06 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
    • DL567: SEA 2026-12-05 22:40:00 → ATL 2026-12-06 06:12:00; layover at ATL: 78 minutes.
    • DL1100: ATL 2026-12-06 07:30:00 → PHL 2026-12-06 09:31:00.

2026-11-21 → 2026-12-05 · $464.25

  • Delta Air Lines DL2092: PHL 2026-11-21 07:00:00 → SEA 2026-11-21 10:05:00; nonstop; 365 minutes. Local airport times.
  • Delta Air Lines DL567 / DL1100: SEA 2026-12-05 22:40:00 → PHL 2026-12-06 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
    • DL567: SEA 2026-12-05 22:40:00 → ATL 2026-12-06 06:12:00; layover at ATL: 78 minutes.
    • DL1100: ATL 2026-12-06 07:30:00 → PHL 2026-12-06 09:31:00.

More dates for this route