Travel with Axel,
get the best price.

Philadelphia → Seattle

Dec 3, 2026 · return Dec 9, 2026

PHL → SEA1 adulteconomyRound trip

10 flight options · 5 airlines

Nonstop flights

Thu, Dec 3 – Wed, Dec 9

Alaska Airlines
7:00 amPHL
6h 28m
Nonstop
10:28 amSEA
Alaska Airlines
9:28 pmSEA
5h 4m
Nonstop
5:32 am+1PHL

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

American Airlines
6:35 pmPHL
6h 24m
Nonstop
9:59 pmSEA
American Airlines
9:15 amSEA
5h 8m
Nonstop
5:23 pmPHL

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

Alaska Airlines
6:11 pmPHL
6h 42m
Nonstop
9:53 pmSEA
Alaska Airlines
9:28 pmSEA
5h 4m
Nonstop
5:32 am+1PHL

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

American Airlines
8:45 amPHL
6h 34m
Nonstop
12:19 pmSEA
American Airlines
9:15 amSEA
5h 8m
Nonstop
5:23 pmPHL

Round-trip total · 1 adult · Taxes included

One-stop flights

Thu, Dec 3 – Wed, Dec 9

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

Thu, Dec 3 – Wed, Dec 9

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

Thu, Dec 3 – Wed, Dec 9

Delta Air Lines
5:34 amPHL
8h 8m
MSP · 1h 10m
10:42 amSEA
Delta Air Lines
6:00 amSEA
7h 35m
DTW · 1h 47m
4:35 pmPHL

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

Delta Air Lines
9:43 amPHL
8h 12m
DTW · 1h 18m
2:55 pmSEA
Delta Air Lines
6:00 amSEA
7h 35m
DTW · 1h 47m
4:35 pmPHL

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

Delta Air Lines
7:15 amPHL
8h 21m
SLC · 1h
12:36 pmSEA
Delta Air Lines
6:00 amSEA
7h 35m
DTW · 1h 47m
4:35 pmPHL

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

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

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 24, 2026 → Nov 29, 2026Dec 22, 2026 → Dec 27, 2026Dec 30, 2026 → Jan 2, 2027Jan 15, 2027 → Jan 18, 2027Oct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Jan 22, 2027 → Jan 25, 2027Oct 30, 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)
2026-12-03 → 2026-12-09Alaska AirlinesAS370 / AS371$385.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09American AirlinesAA2500 / AA771$400.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09Southwest AirlinesWN2108 + WN3032 / WN1550 + WN1623$365.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09United AirlinesUA1811 + UA1660 / UA1686 + UA225$370.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09Delta Air LinesDL2791 + DL868 / DL812 + DL1391$375.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09Alaska AirlinesAS443 / AS371$385.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09American AirlinesAA467 / AA771$400.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09Delta Air LinesDL2968 + DL728 / DL812 + DL1391$375.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09Delta Air LinesDL2023 + DL2995 / DL812 + DL1391$375.002026-10-29T01:56:01Z
2026-12-03 → 2026-12-09Delta Air LinesDL2092 / DL812 + DL1391$392.502026-10-29T01:56:01Z

2026-12-03 → 2026-12-09 · $385.00

  • Alaska Airlines AS370: PHL 2026-12-03 07:00:00 → SEA 2026-12-03 10:28:00; nonstop; 388 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-09 21:28:00 → PHL 2026-12-10 05:32:00; nonstop; 304 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $400.00

  • American Airlines AA2500: PHL 2026-12-03 18:35:00 → SEA 2026-12-03 21:59:00; nonstop; 384 minutes. Local airport times.
  • American Airlines AA771: SEA 2026-12-09 09:15:00 → PHL 2026-12-09 17:23:00; nonstop; 308 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $365.00

  • Southwest Airlines WN2108 / WN3032: PHL 2026-12-03 18:20:00 → SEA 2026-12-03 23:35:00; 1 stop(s) via MDW; 495 minutes. Local airport times.
    • WN2108: PHL 2026-12-03 18:20:00 → MDW 2026-12-03 19:35:00; layover at MDW: 70 minutes.
    • WN3032: MDW 2026-12-03 20:45:00 → SEA 2026-12-03 23:35:00.
  • Southwest Airlines WN1550 / WN1623: SEA 2026-12-09 06:30:00 → PHL 2026-12-09 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-12-09 06:30:00 → MDW 2026-12-09 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-12-09 13:35:00 → PHL 2026-12-09 16:30:00.

2026-12-03 → 2026-12-09 · $370.00

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

2026-12-03 → 2026-12-09 · $375.00

  • Delta Air Lines DL2791 / DL868: PHL 2026-12-03 05:34:00 → SEA 2026-12-03 10:42:00; 1 stop(s) via MSP; 488 minutes. Local airport times.
    • DL2791: PHL 2026-12-03 05:34:00 → MSP 2026-12-03 07:35:00; layover at MSP: 70 minutes.
    • DL868: MSP 2026-12-03 08:45:00 → SEA 2026-12-03 10:42:00.
  • Delta Air Lines DL812 / DL1391: SEA 2026-12-09 06:00:00 → PHL 2026-12-09 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
    • DL812: SEA 2026-12-09 06:00:00 → DTW 2026-12-09 13:12:00; layover at DTW: 107 minutes.
    • DL1391: DTW 2026-12-09 14:59:00 → PHL 2026-12-09 16:35:00.

2026-12-03 → 2026-12-09 · $385.00

  • Alaska Airlines AS443: PHL 2026-12-03 18:11:00 → SEA 2026-12-03 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-12-09 21:28:00 → PHL 2026-12-10 05:32:00; nonstop; 304 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $400.00

  • American Airlines AA467: PHL 2026-12-03 08:45:00 → SEA 2026-12-03 12:19:00; nonstop; 394 minutes. Local airport times.
  • American Airlines AA771: SEA 2026-12-09 09:15:00 → PHL 2026-12-09 17:23:00; nonstop; 308 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $375.00

  • Delta Air Lines DL2968 / DL728: PHL 2026-12-03 09:43:00 → SEA 2026-12-03 14:55:00; 1 stop(s) via DTW; 492 minutes. Local airport times.
    • DL2968: PHL 2026-12-03 09:43:00 → DTW 2026-12-03 11:35:00; layover at DTW: 78 minutes.
    • DL728: DTW 2026-12-03 12:53:00 → SEA 2026-12-03 14:55:00.
  • Delta Air Lines DL812 / DL1391: SEA 2026-12-09 06:00:00 → PHL 2026-12-09 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
    • DL812: SEA 2026-12-09 06:00:00 → DTW 2026-12-09 13:12:00; layover at DTW: 107 minutes.
    • DL1391: DTW 2026-12-09 14:59:00 → PHL 2026-12-09 16:35:00.

2026-12-03 → 2026-12-09 · $375.00

  • Delta Air Lines DL2023 / DL2995: PHL 2026-12-03 07:15:00 → SEA 2026-12-03 12:36:00; 1 stop(s) via SLC; 501 minutes. Local airport times.
    • DL2023: PHL 2026-12-03 07:15:00 → SLC 2026-12-03 10:15:00; layover at SLC: 60 minutes.
    • DL2995: SLC 2026-12-03 11:15:00 → SEA 2026-12-03 12:36:00.
  • Delta Air Lines DL812 / DL1391: SEA 2026-12-09 06:00:00 → PHL 2026-12-09 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
    • DL812: SEA 2026-12-09 06:00:00 → DTW 2026-12-09 13:12:00; layover at DTW: 107 minutes.
    • DL1391: DTW 2026-12-09 14:59:00 → PHL 2026-12-09 16:35:00.

2026-12-03 → 2026-12-09 · $392.50

  • Delta Air Lines DL2092: PHL 2026-12-03 07:00:00 → SEA 2026-12-03 10:05:00; nonstop; 365 minutes. Local airport times.
  • Delta Air Lines DL812 / DL1391: SEA 2026-12-09 06:00:00 → PHL 2026-12-09 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
    • DL812: SEA 2026-12-09 06:00:00 → DTW 2026-12-09 13:12:00; layover at DTW: 107 minutes.
    • DL1391: DTW 2026-12-09 14:59:00 → PHL 2026-12-09 16:35:00.

More dates for this route