Travel with Axel,
get the best price.

Route overview: San Francisco Bay Area to Seattle (SEA) flight deals

San Francisco → Seattle

Dec 9, 2026 · return Dec 12, 2026

SFO → SEA1 adulteconomyRound trip

12 flight options · 5 airlines

Nonstop flights

Wed, Dec 9 – Sat, Dec 12

Alaska Airlines
7:00 amSFO
2h 16m
Nonstop
9:16 amSEA
Alaska Airlines
11:40 amSEA
2h 25m
Nonstop
2:05 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

Delta Air Lines
6:00 amSFO
2h 18m
Nonstop
8:18 amSEA
Delta Air Lines
3:10 pmSEA
2h 18m
Nonstop
5:28 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

United Airlines
12:05 pmSFO
2h 18m
Nonstop
2:23 pmSEA
United Airlines
3:28 pmSEA
2h 16m
Nonstop
5:44 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

Alaska Airlines
5:50 pmSFO
2h 14m
Nonstop
8:04 pmSEA
Alaska Airlines
11:40 amSEA
2h 25m
Nonstop
2:05 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

Delta Air Lines
2:19 pmSFO
2h 25m
Nonstop
4:44 pmSEA
Delta Air Lines
3:10 pmSEA
2h 18m
Nonstop
5:28 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

United Airlines
9:30 pmSFO
2h 14m
Nonstop
11:44 pmSEA
United Airlines
3:28 pmSEA
2h 16m
Nonstop
5:44 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Wed, Dec 9 – Sat, Dec 12

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

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

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

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

Alaska Airlines
7:40 amSFO
4h 29m
PDX · 1h 27m
12:09 pmSEA
Alaska Airlines
11:40 amSEA
2h 25m
Nonstop
2:05 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

Alaska Airlines
1:39 pmSFO
7h 51m
PSP · 3h 15m
9:30 pmSEA
Alaska Airlines
11:40 amSEA
2h 25m
Nonstop
2:05 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

United Airlines
8:31 amSFO
6h 1m
YVR · 2h 30m
2:32 pmSEA
United Airlines
3:28 pmSEA
2h 16m
Nonstop
5:44 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Wed, Dec 9 – Sat, Dec 12

United Airlines
5:50 amSFO
5h 36m
LAX · 1h 5m
11:26 amSEA
United Airlines
3:28 pmSEA
2h 16m
Nonstop
5:44 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

SFO ⇄ 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

Explore this route

All dates for this routeDec 8, 2026 · Return optionsDec 10, 2026 · Return optionsHotels in Seattle with Axel
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.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-09 → 2026-12-12Alaska AirlinesAS591 / AS655Axel-exclusive $220.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12Delta Air LinesDL2721 / DL3707Axel-exclusive $230.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12United AirlinesUA1264 / UA2478Axel-exclusive $240.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12Frontier AirlinesF91230 + F91175 / F92176 + F94593Axel-exclusive $165.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12Air CanadaAC567 + AC8810 / AC8807 + UA1083Axel-exclusive $410.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12Alaska AirlinesAS620 / AS655Axel-exclusive $220.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12Delta Air LinesDL1412 / DL3707Axel-exclusive $230.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12United AirlinesUA1007 / UA2478Axel-exclusive $240.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12Alaska AirlinesAS1410 + AS3217 / AS655Axel-exclusive $240.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12Alaska AirlinesAS3124 + AS295 / AS655Axel-exclusive $240.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12United AirlinesUA2259 + AC8804 / UA2478Axel-exclusive $270.002026-10-29T01:19:49Z
2026-12-09 → 2026-12-12United AirlinesUA2127 + UA726 / UA2478Axel-exclusive $270.002026-10-29T01:19:49Z

Route overview: San Francisco Bay Area to Seattle (SEA) flight deals

2026-12-09 → 2026-12-12 · Axel-exclusive $220.00

  • Alaska Airlines AS591: SFO 2026-12-09 07:00:00 → SEA 2026-12-09 09:16:00; nonstop; 136 minutes. Local airport times.
  • Alaska Airlines AS655: SEA 2026-12-12 11:40:00 → SFO 2026-12-12 14:05:00; nonstop; 145 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $230.00

  • Delta Air Lines DL2721: SFO 2026-12-09 06:00:00 → SEA 2026-12-09 08:18:00; nonstop; 138 minutes. Local airport times.
  • Delta Air Lines DL3707: SEA 2026-12-12 15:10:00 → SFO 2026-12-12 17:28:00; nonstop; 138 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $240.00

  • United Airlines UA1264: SFO 2026-12-09 12:05:00 → SEA 2026-12-09 14:23:00; nonstop; 138 minutes. Local airport times.
  • United Airlines UA2478: SEA 2026-12-12 15:28:00 → SFO 2026-12-12 17:44:00; nonstop; 136 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $165.00

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

2026-12-09 → 2026-12-12 · Axel-exclusive $410.00

  • Air Canada AC567 / AC8810: SFO 2026-12-09 14:45:00 → SEA 2026-12-09 21:57:00; 1 stop(s) via YVR; 432 minutes. Local airport times.
    • AC567: SFO 2026-12-09 14:45:00 → YVR 2026-12-09 18:05:00; layover at YVR: 225 minutes.
    • AC8810: YVR 2026-12-09 21:50:00 → SEA 2026-12-09 21:57:00.
  • Air Canada AC8807 / UA1083: SEA 2026-12-12 15:15:00 → SFO 2026-12-12 21:42:00; 1 stop(s) via YVR; 387 minutes. Local airport times.
    • AC8807: SEA 2026-12-12 15:15:00 → YVR 2026-12-12 17:26:00; layover at YVR: 169 minutes.
    • UA1083: YVR 2026-12-12 20:15:00 → SFO 2026-12-12 21:42:00.

2026-12-09 → 2026-12-12 · Axel-exclusive $220.00

  • Alaska Airlines AS620: SFO 2026-12-09 17:50:00 → SEA 2026-12-09 20:04:00; nonstop; 134 minutes. Local airport times.
  • Alaska Airlines AS655: SEA 2026-12-12 11:40:00 → SFO 2026-12-12 14:05:00; nonstop; 145 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $230.00

  • Delta Air Lines DL1412: SFO 2026-12-09 14:19:00 → SEA 2026-12-09 16:44:00; nonstop; 145 minutes. Local airport times.
  • Delta Air Lines DL3707: SEA 2026-12-12 15:10:00 → SFO 2026-12-12 17:28:00; nonstop; 138 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $240.00

  • United Airlines UA1007: SFO 2026-12-09 21:30:00 → SEA 2026-12-09 23:44:00; nonstop; 134 minutes. Local airport times.
  • United Airlines UA2478: SEA 2026-12-12 15:28:00 → SFO 2026-12-12 17:44:00; nonstop; 136 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $240.00

  • Alaska Airlines AS1410 / AS3217: SFO 2026-12-09 07:40:00 → SEA 2026-12-09 12:09:00; 1 stop(s) via PDX; 269 minutes. Local airport times.
    • AS1410: SFO 2026-12-09 07:40:00 → PDX 2026-12-09 09:27:00; layover at PDX: 87 minutes.
    • AS3217: PDX 2026-12-09 10:54:00 → SEA 2026-12-09 12:09:00.
  • Alaska Airlines AS655: SEA 2026-12-12 11:40:00 → SFO 2026-12-12 14:05:00; nonstop; 145 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $240.00

  • Alaska Airlines AS3124 / AS295: SFO 2026-12-09 13:39:00 → SEA 2026-12-09 21:30:00; 1 stop(s) via PSP; 471 minutes. Local airport times.
    • AS3124: SFO 2026-12-09 13:39:00 → PSP 2026-12-09 15:17:00; layover at PSP: 195 minutes.
    • AS295: PSP 2026-12-09 18:32:00 → SEA 2026-12-09 21:30:00.
  • Alaska Airlines AS655: SEA 2026-12-12 11:40:00 → SFO 2026-12-12 14:05:00; nonstop; 145 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $270.00

  • United Airlines UA2259 / AC8804: SFO 2026-12-09 08:31:00 → SEA 2026-12-09 14:32:00; 1 stop(s) via YVR; 361 minutes. Local airport times.
    • UA2259: SFO 2026-12-09 08:31:00 → YVR 2026-12-09 12:00:00; layover at YVR: 150 minutes.
    • AC8804: YVR 2026-12-09 14:30:00 → SEA 2026-12-09 14:32:00.
  • United Airlines UA2478: SEA 2026-12-12 15:28:00 → SFO 2026-12-12 17:44:00; nonstop; 136 minutes. Local airport times.

2026-12-09 → 2026-12-12 · Axel-exclusive $270.00

  • United Airlines UA2127 / UA726: SFO 2026-12-09 05:50:00 → SEA 2026-12-09 11:26:00; 1 stop(s) via LAX; 336 minutes. Local airport times.
    • UA2127: SFO 2026-12-09 05:50:00 → LAX 2026-12-09 07:22:00; layover at LAX: 65 minutes.
    • UA726: LAX 2026-12-09 08:27:00 → SEA 2026-12-09 11:26:00.
  • United Airlines UA2478: SEA 2026-12-12 15:28:00 → SFO 2026-12-12 17:44:00; nonstop; 136 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: San Francisco (SFO) to Seattle (SEA) · Dec 9, 2026 · return Dec 12, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel San Francisco Bay Area to Seattle (SEA) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.