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San Francisco → Seattle

Dec 21, 2026 · return Jan 4, 2027

SFO → SEA1 adulteconomyRound trip

12 flight options · 6 airlines

Nonstop flights

Mon, Dec 21 – Mon, Jan 4

Alaska Airlines
6:00 amSFO
2h 15m
Nonstop
8:15 amSEA
Alaska Airlines
7:33 pmSEA
2h 10m
Nonstop
9:43 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

Delta Air Lines
5:53 pmSFO
2h 20m
Nonstop
8:13 pmSEA
Delta Air Lines
7:52 pmSEA
2h 16m
Nonstop
10:08 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

United Airlines
2:20 pmSFO
2h 12m
Nonstop
4:32 pmSEA
United Airlines
7:30 pmSEA
2h 12m
Nonstop
9:42 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

Alaska Airlines
5:42 pmSFO
2h 12m
Nonstop
7:54 pmSEA
Alaska Airlines
7:33 pmSEA
2h 10m
Nonstop
9:43 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

Delta Air Lines
6:17 amSFO
2h 18m
Nonstop
8:35 amSEA
Delta Air Lines
7:52 pmSEA
2h 16m
Nonstop
10:08 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

United Airlines
10:35 pmSFO
2h 10m
Nonstop
12:45 am+1SEA
United Airlines
7:30 pmSEA
2h 12m
Nonstop
9:42 pmSFO

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Mon, Jan 4

Frontier Airlines
6:02 amSFO
9h 10m
DEN · 3h 24m
3:12 pmSEA
Frontier Airlines
1:36 pmSEA
6h 32m
LAX · 2h 22m
8:08 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

American Airlines
7:00 amSFO
6h
LAX · 1h 17m
1:00 pmSEA
American Airlines
1:35 pmSEA
6h 52m
LAX · 2h 20m
8:27 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

Air Canada
2:45 pmSFO
7h 12m
YVR · 3h 45m
9:57 pmSEA
Air Canada
3:15 pmSEA
6h 27m
YVR · 2h 49m
9:42 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

Alaska Airlines
7:40 amSFO
4h 29m
PDX · 1h 27m
12:09 pmSEA
Alaska Airlines
7:33 pmSEA
2h 10m
Nonstop
9:43 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

United Airlines
8:31 amSFO
6h 1m
YVR · 2h 30m
2:32 pmSEA
United Airlines
7:30 pmSEA
2h 12m
Nonstop
9:42 pmSFO

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Mon, Jan 4

United Airlines
5:50 amSFO
5h 36m
LAX · 1h 5m
11:26 amSEA
United Airlines
7:30 pmSEA
2h 12m
Nonstop
9:42 pmSFO

Round-trip total · 1 adult · Taxes included

Make this trip yours

SFO ⇄ SEA

Economy

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

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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
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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 → 2027-01-04Alaska AirlinesAS1327 / AS619$253.002026-10-29T01:19:49Z
2026-12-21 → 2027-01-04Delta Air LinesDL3707 / DL2635$264.502026-10-29T01:19:49Z
2026-12-21 → 2027-01-04United AirlinesUA433 / UA737$276.002026-10-29T01:19:49Z
2026-12-21 → 2027-01-04Frontier AirlinesF91230 + F91175 / F92176 + F94593$189.752026-10-29T01:19:49Z
2026-12-21 → 2027-01-04American AirlinesAA2211 + AA4997 / AA4997 + AA6448$368.002026-10-29T01:19:49Z
2026-12-21 → 2027-01-04Air CanadaAC567 + AC8810 / AC8807 + UA1083$471.502026-10-29T01:19:49Z
2026-12-21 → 2027-01-04Alaska AirlinesAS1340 / AS619$253.002026-10-29T01:19:49Z
2026-12-21 → 2027-01-04Delta Air LinesDL2721 / DL2635$264.502026-10-29T01:19:49Z
2026-12-21 → 2027-01-04United AirlinesUA1761 / UA737$276.002026-10-29T01:19:49Z
2026-12-21 → 2027-01-04Alaska AirlinesAS1410 + AS3217 / AS619$279.002026-10-29T01:19:49Z
2026-12-21 → 2027-01-04United AirlinesUA2259 + AC8804 / UA737$315.002026-10-29T01:19:49Z
2026-12-21 → 2027-01-04United AirlinesUA2127 + UA726 / UA737$315.002026-10-29T01:19:49Z

2026-12-21 → 2027-01-04 · $253.00

  • Alaska Airlines AS1327: SFO 2026-12-21 06:00:00 → SEA 2026-12-21 08:15:00; nonstop; 135 minutes. Local airport times.
  • Alaska Airlines AS619: SEA 2027-01-04 19:33:00 → SFO 2027-01-04 21:43:00; nonstop; 130 minutes. Local airport times.

2026-12-21 → 2027-01-04 · $264.50

  • Delta Air Lines DL3707: SFO 2026-12-21 17:53:00 → SEA 2026-12-21 20:13:00; nonstop; 140 minutes. Local airport times.
  • Delta Air Lines DL2635: SEA 2027-01-04 19:52:00 → SFO 2027-01-04 22:08:00; nonstop; 136 minutes. Local airport times.

2026-12-21 → 2027-01-04 · $276.00

  • United Airlines UA433: SFO 2026-12-21 14:20:00 → SEA 2026-12-21 16:32:00; nonstop; 132 minutes. Local airport times.
  • United Airlines UA737: SEA 2027-01-04 19:30:00 → SFO 2027-01-04 21:42:00; nonstop; 132 minutes. Local airport times.

2026-12-21 → 2027-01-04 · $189.75

  • Frontier Airlines F91230 / F91175: SFO 2026-12-21 06:02:00 → SEA 2026-12-21 15:12:00; 1 stop(s) via DEN; 550 minutes. Local airport times.
    • F91230: SFO 2026-12-21 06:02:00 → DEN 2026-12-21 09:40:00; layover at DEN: 204 minutes.
    • F91175: DEN 2026-12-21 13:04:00 → SEA 2026-12-21 15:12:00.
  • Frontier Airlines F92176 / F94593: SEA 2027-01-04 13:36:00 → SFO 2027-01-04 20:08:00; 1 stop(s) via LAX; 392 minutes. Local airport times.
    • F92176: SEA 2027-01-04 13:36:00 → LAX 2027-01-04 16:18:00; layover at LAX: 142 minutes.
    • F94593: LAX 2027-01-04 18:40:00 → SFO 2027-01-04 20:08:00.

2026-12-21 → 2027-01-04 · $368.00

  • American Airlines AA2211 / AA4997: SFO 2026-12-21 07:00:00 → SEA 2026-12-21 13:00:00; 1 stop(s) via LAX; 360 minutes. Local airport times.
    • AA2211: SFO 2026-12-21 07:00:00 → LAX 2026-12-21 08:37:00; layover at LAX: 77 minutes.
    • AA4997: LAX 2026-12-21 09:54:00 → SEA 2026-12-21 13:00:00.
  • American Airlines AA4997 / AA6448: SEA 2027-01-04 13:35:00 → SFO 2027-01-04 20:27:00; 1 stop(s) via LAX; 412 minutes. Local airport times.
    • AA4997: SEA 2027-01-04 13:35:00 → LAX 2027-01-04 16:31:00; layover at LAX: 140 minutes.
    • AA6448: LAX 2027-01-04 18:51:00 → SFO 2027-01-04 20:27:00.

2026-12-21 → 2027-01-04 · $471.50

  • Air Canada AC567 / AC8810: SFO 2026-12-21 14:45:00 → SEA 2026-12-21 21:57:00; 1 stop(s) via YVR; 432 minutes. Local airport times.
    • AC567: SFO 2026-12-21 14:45:00 → YVR 2026-12-21 18:05:00; layover at YVR: 225 minutes.
    • AC8810: YVR 2026-12-21 21:50:00 → SEA 2026-12-21 21:57:00.
  • Air Canada AC8807 / UA1083: SEA 2027-01-04 15:15:00 → SFO 2027-01-04 21:42:00; 1 stop(s) via YVR; 387 minutes. Local airport times.
    • AC8807: SEA 2027-01-04 15:15:00 → YVR 2027-01-04 17:26:00; layover at YVR: 169 minutes.
    • UA1083: YVR 2027-01-04 20:15:00 → SFO 2027-01-04 21:42:00.

2026-12-21 → 2027-01-04 · $253.00

  • Alaska Airlines AS1340: SFO 2026-12-21 17:42:00 → SEA 2026-12-21 19:54:00; nonstop; 132 minutes. Local airport times.
  • Alaska Airlines AS619: SEA 2027-01-04 19:33:00 → SFO 2027-01-04 21:43:00; nonstop; 130 minutes. Local airport times.

2026-12-21 → 2027-01-04 · $264.50

  • Delta Air Lines DL2721: SFO 2026-12-21 06:17:00 → SEA 2026-12-21 08:35:00; nonstop; 138 minutes. Local airport times.
  • Delta Air Lines DL2635: SEA 2027-01-04 19:52:00 → SFO 2027-01-04 22:08:00; nonstop; 136 minutes. Local airport times.

2026-12-21 → 2027-01-04 · $276.00

  • United Airlines UA1761: SFO 2026-12-21 22:35:00 → SEA 2026-12-22 00:45:00; nonstop; 130 minutes. Local airport times.
  • United Airlines UA737: SEA 2027-01-04 19:30:00 → SFO 2027-01-04 21:42:00; nonstop; 132 minutes. Local airport times.

2026-12-21 → 2027-01-04 · $279.00

  • Alaska Airlines AS1410 / AS3217: SFO 2026-12-21 07:40:00 → SEA 2026-12-21 12:09:00; 1 stop(s) via PDX; 269 minutes. Local airport times.
    • AS1410: SFO 2026-12-21 07:40:00 → PDX 2026-12-21 09:27:00; layover at PDX: 87 minutes.
    • AS3217: PDX 2026-12-21 10:54:00 → SEA 2026-12-21 12:09:00.
  • Alaska Airlines AS619: SEA 2027-01-04 19:33:00 → SFO 2027-01-04 21:43:00; nonstop; 130 minutes. Local airport times.

2026-12-21 → 2027-01-04 · $315.00

  • United Airlines UA2259 / AC8804: SFO 2026-12-21 08:31:00 → SEA 2026-12-21 14:32:00; 1 stop(s) via YVR; 361 minutes. Local airport times.
    • UA2259: SFO 2026-12-21 08:31:00 → YVR 2026-12-21 12:00:00; layover at YVR: 150 minutes.
    • AC8804: YVR 2026-12-21 14:30:00 → SEA 2026-12-21 14:32:00.
  • United Airlines UA737: SEA 2027-01-04 19:30:00 → SFO 2027-01-04 21:42:00; nonstop; 132 minutes. Local airport times.

2026-12-21 → 2027-01-04 · $315.00

  • United Airlines UA2127 / UA726: SFO 2026-12-21 05:50:00 → SEA 2026-12-21 11:26:00; 1 stop(s) via LAX; 336 minutes. Local airport times.
    • UA2127: SFO 2026-12-21 05:50:00 → LAX 2026-12-21 07:22:00; layover at LAX: 65 minutes.
    • UA726: LAX 2026-12-21 08:27:00 → SEA 2026-12-21 11:26:00.
  • United Airlines UA737: SEA 2027-01-04 19:30:00 → SFO 2027-01-04 21:42:00; nonstop; 132 minutes. Local airport times.

More dates for this route