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

San Francisco → Seattle

Jan 21, 2027 · return Jan 22, 2027

SFO → SEA1 adulteconomyRound trip

12 flight options · 4 airlines

Nonstop flights

Thu, Jan 21 – Fri, Jan 22

Alaska Airlines
7:00 amSFO
2h 16m
Nonstop
9:16 amSEA
Alaska Airlines
7:29 pmSEA
2h 11m
Nonstop
9:40 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

Delta Air Lines
2:20 pmSFO
2h 24m
Nonstop
4:44 pmSEA
Delta Air Lines
10:57 amSEA
2h 29m
Nonstop
1:26 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

United Airlines
9:08 pmSFO
2h 10m
Nonstop
11:18 pmSEA
United Airlines
3:24 pmSEA
2h 21m
Nonstop
5:45 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

Alaska Airlines
3:58 pmSFO
2h 15m
Nonstop
6:13 pmSEA
Alaska Airlines
7:29 pmSEA
2h 11m
Nonstop
9:40 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

Delta Air Lines
10:41 amSFO
2h 19m
Nonstop
1:00 pmSEA
Delta Air Lines
10:57 amSEA
2h 29m
Nonstop
1:26 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

United Airlines
4:17 pmSFO
2h 12m
Nonstop
6:29 pmSEA
United Airlines
3:24 pmSEA
2h 21m
Nonstop
5:45 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Thu, Jan 21 – Fri, Jan 22

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.

Thu, Jan 21 – Fri, Jan 22

Alaska Airlines
1:39 pmSFO
7h 51m
PSP · 3h 15m
9:30 pmSEA
Alaska Airlines
7:29 pmSEA
2h 11m
Nonstop
9:40 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

Alaska Airlines
2:39 pmSFO
5h 37m
LAS · 1h 9m
8:16 pmSEA
Alaska Airlines
7:29 pmSEA
2h 11m
Nonstop
9:40 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

Alaska Airlines
7:40 amSFO
4h 29m
PDX · 1h 27m
12:09 pmSEA
Alaska Airlines
7:29 pmSEA
2h 11m
Nonstop
9:40 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

United Airlines
8:31 amSFO
6h 1m
YVR · 2h 30m
2:32 pmSEA
United Airlines
3:24 pmSEA
2h 21m
Nonstop
5:45 pmSFO

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Fri, Jan 22

United Airlines
5:50 amSFO
5h 36m
LAX · 1h 5m
11:26 amSEA
United Airlines
3:24 pmSEA
2h 21m
Nonstop
5:45 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.

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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.
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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

Explore this route

All dates for this routeJan 20, 2027 · Return optionsJan 22, 2027 · 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)
2027-01-21 → 2027-01-22Alaska AirlinesAS591 / AS590Axel-exclusive $220.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22Delta Air LinesDL4118 / DL4118Axel-exclusive $230.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22United AirlinesUA1007 / UA2478Axel-exclusive $240.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22Air CanadaAC567 + AC8810 / AC8807 + UA1083Axel-exclusive $410.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22Alaska AirlinesAS630 / AS590Axel-exclusive $220.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22Delta Air LinesDL1356 / DL4118Axel-exclusive $230.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22United AirlinesUA2279 / UA2478Axel-exclusive $240.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22Alaska AirlinesAS3124 + AS295 / AS590Axel-exclusive $240.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22Alaska AirlinesAS776 + AS738 / AS590Axel-exclusive $240.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22Alaska AirlinesAS1410 + AS3217 / AS590Axel-exclusive $240.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22United AirlinesUA2259 + AC8804 / UA2478Axel-exclusive $270.002026-10-29T01:19:49Z
2027-01-21 → 2027-01-22United AirlinesUA2127 + UA726 / UA2478Axel-exclusive $270.002026-10-29T01:19:49Z

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

2027-01-21 → 2027-01-22 · Axel-exclusive $220.00

  • Alaska Airlines AS591: SFO 2027-01-21 07:00:00 → SEA 2027-01-21 09:16:00; nonstop; 136 minutes. Local airport times.
  • Alaska Airlines AS590: SEA 2027-01-22 19:29:00 → SFO 2027-01-22 21:40:00; nonstop; 131 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $230.00

  • Delta Air Lines DL4118: SFO 2027-01-21 14:20:00 → SEA 2027-01-21 16:44:00; nonstop; 144 minutes. Local airport times.
  • Delta Air Lines DL4118: SEA 2027-01-22 10:57:00 → SFO 2027-01-22 13:26:00; nonstop; 149 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $240.00

  • United Airlines UA1007: SFO 2027-01-21 21:08:00 → SEA 2027-01-21 23:18:00; nonstop; 130 minutes. Local airport times.
  • United Airlines UA2478: SEA 2027-01-22 15:24:00 → SFO 2027-01-22 17:45:00; nonstop; 141 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $410.00

  • Air Canada AC567 / AC8810: SFO 2027-01-21 14:45:00 → SEA 2027-01-21 21:57:00; 1 stop(s) via YVR; 432 minutes. Local airport times.
    • AC567: SFO 2027-01-21 14:45:00 → YVR 2027-01-21 18:05:00; layover at YVR: 225 minutes.
    • AC8810: YVR 2027-01-21 21:50:00 → SEA 2027-01-21 21:57:00.
  • Air Canada AC8807 / UA1083: SEA 2027-01-22 15:15:00 → SFO 2027-01-22 21:42:00; 1 stop(s) via YVR; 387 minutes. Local airport times.
    • AC8807: SEA 2027-01-22 15:15:00 → YVR 2027-01-22 17:26:00; layover at YVR: 169 minutes.
    • UA1083: YVR 2027-01-22 20:15:00 → SFO 2027-01-22 21:42:00.

2027-01-21 → 2027-01-22 · Axel-exclusive $220.00

  • Alaska Airlines AS630: SFO 2027-01-21 15:58:00 → SEA 2027-01-21 18:13:00; nonstop; 135 minutes. Local airport times.
  • Alaska Airlines AS590: SEA 2027-01-22 19:29:00 → SFO 2027-01-22 21:40:00; nonstop; 131 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $230.00

  • Delta Air Lines DL1356: SFO 2027-01-21 10:41:00 → SEA 2027-01-21 13:00:00; nonstop; 139 minutes. Local airport times.
  • Delta Air Lines DL4118: SEA 2027-01-22 10:57:00 → SFO 2027-01-22 13:26:00; nonstop; 149 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $240.00

  • United Airlines UA2279: SFO 2027-01-21 16:17:00 → SEA 2027-01-21 18:29:00; nonstop; 132 minutes. Local airport times.
  • United Airlines UA2478: SEA 2027-01-22 15:24:00 → SFO 2027-01-22 17:45:00; nonstop; 141 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $240.00

  • Alaska Airlines AS3124 / AS295: SFO 2027-01-21 13:39:00 → SEA 2027-01-21 21:30:00; 1 stop(s) via PSP; 471 minutes. Local airport times.
    • AS3124: SFO 2027-01-21 13:39:00 → PSP 2027-01-21 15:17:00; layover at PSP: 195 minutes.
    • AS295: PSP 2027-01-21 18:32:00 → SEA 2027-01-21 21:30:00.
  • Alaska Airlines AS590: SEA 2027-01-22 19:29:00 → SFO 2027-01-22 21:40:00; nonstop; 131 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $240.00

  • Alaska Airlines AS776 / AS738: SFO 2027-01-21 14:39:00 → SEA 2027-01-21 20:16:00; 1 stop(s) via LAS; 337 minutes. Local airport times.
    • AS776: SFO 2027-01-21 14:39:00 → LAS 2027-01-21 16:16:00; layover at LAS: 69 minutes.
    • AS738: LAS 2027-01-21 17:25:00 → SEA 2027-01-21 20:16:00.
  • Alaska Airlines AS590: SEA 2027-01-22 19:29:00 → SFO 2027-01-22 21:40:00; nonstop; 131 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $240.00

  • Alaska Airlines AS1410 / AS3217: SFO 2027-01-21 07:40:00 → SEA 2027-01-21 12:09:00; 1 stop(s) via PDX; 269 minutes. Local airport times.
    • AS1410: SFO 2027-01-21 07:40:00 → PDX 2027-01-21 09:27:00; layover at PDX: 87 minutes.
    • AS3217: PDX 2027-01-21 10:54:00 → SEA 2027-01-21 12:09:00.
  • Alaska Airlines AS590: SEA 2027-01-22 19:29:00 → SFO 2027-01-22 21:40:00; nonstop; 131 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $270.00

  • United Airlines UA2259 / AC8804: SFO 2027-01-21 08:31:00 → SEA 2027-01-21 14:32:00; 1 stop(s) via YVR; 361 minutes. Local airport times.
    • UA2259: SFO 2027-01-21 08:31:00 → YVR 2027-01-21 12:00:00; layover at YVR: 150 minutes.
    • AC8804: YVR 2027-01-21 14:30:00 → SEA 2027-01-21 14:32:00.
  • United Airlines UA2478: SEA 2027-01-22 15:24:00 → SFO 2027-01-22 17:45:00; nonstop; 141 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $270.00

  • United Airlines UA2127 / UA726: SFO 2027-01-21 05:50:00 → SEA 2027-01-21 11:26:00; 1 stop(s) via LAX; 336 minutes. Local airport times.
    • UA2127: SFO 2027-01-21 05:50:00 → LAX 2027-01-21 07:22:00; layover at LAX: 65 minutes.
    • UA726: LAX 2027-01-21 08:27:00 → SEA 2027-01-21 11:26:00.
  • United Airlines UA2478: SEA 2027-01-22 15:24:00 → SFO 2027-01-22 17:45:00; nonstop; 141 minutes. Local airport times.

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For AI assistants

  • This page: San Francisco (SFO) to Seattle (SEA) · Jan 21, 2027 · return Jan 22, 2027: 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.