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Route overview: Seattle area (Sea-Tac and Paine Field) to San Francisco (SFO) flight deals

Seattle → San Francisco

Jan 21, 2027 · return Jan 28, 2027

SEA → SFO1 adulteconomyRound trip

12 flight options · 6 airlines

Nonstop flights

Thu, Jan 21 – Thu, Jan 28

Alaska Airlines
7:16 amSEA
2h 21m
Nonstop
9:37 amSFO
Alaska Airlines
7:00 amSFO
2h 16m
Nonstop
9:16 amSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

Delta Air Lines
7:52 pmSEA
2h 16m
Nonstop
10:08 pmSFO
Delta Air Lines
10:41 amSFO
2h 19m
Nonstop
1:00 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

United Airlines
7:00 amSEA
2h 22m
Nonstop
9:22 amSFO
United Airlines
9:08 pmSFO
2h 10m
Nonstop
11:18 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

Delta Air Lines
7:15 amSEA
2h 26m
Nonstop
9:41 amSFO
Delta Air Lines
10:41 amSFO
2h 19m
Nonstop
1:00 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

United Airlines
3:34 pmSEA
2h 16m
Nonstop
5:50 pmSFO
United Airlines
9:08 pmSFO
2h 10m
Nonstop
11:18 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Thu, Jan 21 – Thu, Jan 28

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

American Airlines
4:40 pmSEA
6h 37m
LAX · 1h 59m
11:17 pmSFO
American Airlines
5:50 amSFO
8h 4m
PHX · 2h 28m
1:54 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

Alaska Airlines
10:19 amSEA
5h 12m
GEG · 1h 38m
3:31 pmSFO
Alaska Airlines
7:00 amSFO
2h 16m
Nonstop
9:16 amSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

Alaska Airlines
12:22 pmSEA
4h 15m
PDX · 1h 17m
4:37 pmSFO
Alaska Airlines
7:00 amSFO
2h 16m
Nonstop
9:16 amSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Jan 21 – Thu, Jan 28

Delta Air Lines
12:31 pmSEA
7h 11m
LAX · 2h 58m
7:42 pmSFO
Delta Air Lines
10:41 amSFO
2h 19m
Nonstop
1:00 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

SEA ⇄ SFO

Economy

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

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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 San Francisco 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 → 2027-01-28Alaska AirlinesAS725 / AS591Axel-exclusive $235.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28Delta Air LinesDL2635 / DL1356Axel-exclusive $245.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28United AirlinesUA499 / UA1007Axel-exclusive $250.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28Frontier AirlinesF92176 + F94593 / F91230 + F91175Axel-exclusive $195.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28American AirlinesAA4945 + AA6260 / AA6185 + AA2073Axel-exclusive $325.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28Air CanadaAC8807 + UA1083 / AC567 + AC8810Axel-exclusive $385.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28Alaska AirlinesAS590 / AS591Axel-exclusive $235.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28Delta Air LinesDL3699 / DL1356Axel-exclusive $245.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28United AirlinesUA2478 / UA1007Axel-exclusive $250.002026-10-29T00:39:30Z
2027-01-21 → 2027-01-28Alaska AirlinesAS635 + AS3011 / AS591Axel-exclusive $257.502026-10-29T00:39:30Z
2027-01-21 → 2027-01-28Alaska AirlinesAS488 + AS236 / AS591Axel-exclusive $257.502026-10-29T00:39:30Z
2027-01-21 → 2027-01-28Delta Air LinesDL2914 + DL2197 / DL1356Axel-exclusive $280.002026-10-29T00:39:30Z

Route overview: Seattle area (Sea-Tac and Paine Field) to San Francisco (SFO) flight deals

2027-01-21 → 2027-01-28 · Axel-exclusive $235.00

  • Alaska Airlines AS725: SEA 2027-01-21 07:16:00 → SFO 2027-01-21 09:37:00; nonstop; 141 minutes. Local airport times.
  • Alaska Airlines AS591: SFO 2027-01-28 07:00:00 → SEA 2027-01-28 09:16:00; nonstop; 136 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $245.00

  • Delta Air Lines DL2635: SEA 2027-01-21 19:52:00 → SFO 2027-01-21 22:08:00; nonstop; 136 minutes. Local airport times.
  • Delta Air Lines DL1356: SFO 2027-01-28 10:41:00 → SEA 2027-01-28 13:00:00; nonstop; 139 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $250.00

  • United Airlines UA499: SEA 2027-01-21 07:00:00 → SFO 2027-01-21 09:22:00; nonstop; 142 minutes. Local airport times.
  • United Airlines UA1007: SFO 2027-01-28 21:08:00 → SEA 2027-01-28 23:18:00; nonstop; 130 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $195.00

  • Frontier Airlines F92176 / F94593: SEA 2027-01-21 13:36:00 → SFO 2027-01-21 20:08:00; 1 stop(s) via LAX; 392 minutes. Local airport times.
    • F92176: SEA 2027-01-21 13:36:00 → LAX 2027-01-21 16:18:00; layover at LAX: 142 minutes.
    • F94593: LAX 2027-01-21 18:40:00 → SFO 2027-01-21 20:08:00.
  • Frontier Airlines F91230 / F91175: SFO 2027-01-28 06:02:00 → SEA 2027-01-28 15:12:00; 1 stop(s) via DEN; 550 minutes. Local airport times.
    • F91230: SFO 2027-01-28 06:02:00 → DEN 2027-01-28 09:40:00; layover at DEN: 204 minutes.
    • F91175: DEN 2027-01-28 13:04:00 → SEA 2027-01-28 15:12:00.

2027-01-21 → 2027-01-28 · Axel-exclusive $325.00

  • American Airlines AA4945 / AA6260: SEA 2027-01-21 16:40:00 → SFO 2027-01-21 23:17:00; 1 stop(s) via LAX; 397 minutes. Local airport times.
    • AA4945: SEA 2027-01-21 16:40:00 → LAX 2027-01-21 19:36:00; layover at LAX: 119 minutes.
    • AA6260: LAX 2027-01-21 21:35:00 → SFO 2027-01-21 23:17:00.
  • American Airlines AA6185 / AA2073: SFO 2027-01-28 05:50:00 → SEA 2027-01-28 13:54:00; 1 stop(s) via PHX; 484 minutes. Local airport times.
    • AA6185: SFO 2027-01-28 05:50:00 → PHX 2027-01-28 09:02:00; layover at PHX: 148 minutes.
    • AA2073: PHX 2027-01-28 11:30:00 → SEA 2027-01-28 13:54:00.

2027-01-21 → 2027-01-28 · Axel-exclusive $385.00

  • Air Canada AC8807 / UA1083: SEA 2027-01-21 15:15:00 → SFO 2027-01-21 21:42:00; 1 stop(s) via YVR; 387 minutes. Local airport times.
    • AC8807: SEA 2027-01-21 15:15:00 → YVR 2027-01-21 17:26:00; layover at YVR: 169 minutes.
    • UA1083: YVR 2027-01-21 20:15:00 → SFO 2027-01-21 21:42:00.
  • Air Canada AC567 / AC8810: SFO 2027-01-28 14:45:00 → SEA 2027-01-28 21:57:00; 1 stop(s) via YVR; 432 minutes. Local airport times.
    • AC567: SFO 2027-01-28 14:45:00 → YVR 2027-01-28 18:05:00; layover at YVR: 225 minutes.
    • AC8810: YVR 2027-01-28 21:50:00 → SEA 2027-01-28 21:57:00.

2027-01-21 → 2027-01-28 · Axel-exclusive $235.00

  • Alaska Airlines AS590: SEA 2027-01-21 19:29:00 → SFO 2027-01-21 21:40:00; nonstop; 131 minutes. Local airport times.
  • Alaska Airlines AS591: SFO 2027-01-28 07:00:00 → SEA 2027-01-28 09:16:00; nonstop; 136 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $245.00

  • Delta Air Lines DL3699: SEA 2027-01-21 07:15:00 → SFO 2027-01-21 09:41:00; nonstop; 146 minutes. Local airport times.
  • Delta Air Lines DL1356: SFO 2027-01-28 10:41:00 → SEA 2027-01-28 13:00:00; nonstop; 139 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $250.00

  • United Airlines UA2478: SEA 2027-01-21 15:34:00 → SFO 2027-01-21 17:50:00; nonstop; 136 minutes. Local airport times.
  • United Airlines UA1007: SFO 2027-01-28 21:08:00 → SEA 2027-01-28 23:18:00; nonstop; 130 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $257.50

  • Alaska Airlines AS635 / AS3011: SEA 2027-01-21 10:19:00 → SFO 2027-01-21 15:31:00; 1 stop(s) via GEG; 312 minutes. Local airport times.
    • AS635: SEA 2027-01-21 10:19:00 → GEG 2027-01-21 11:30:00; layover at GEG: 98 minutes.
    • AS3011: GEG 2027-01-21 13:08:00 → SFO 2027-01-21 15:31:00.
  • Alaska Airlines AS591: SFO 2027-01-28 07:00:00 → SEA 2027-01-28 09:16:00; nonstop; 136 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $257.50

  • Alaska Airlines AS488 / AS236: SEA 2027-01-21 12:22:00 → SFO 2027-01-21 16:37:00; 1 stop(s) via PDX; 255 minutes. Local airport times.
    • AS488: SEA 2027-01-21 12:22:00 → PDX 2027-01-21 13:24:00; layover at PDX: 77 minutes.
    • AS236: PDX 2027-01-21 14:41:00 → SFO 2027-01-21 16:37:00.
  • Alaska Airlines AS591: SFO 2027-01-28 07:00:00 → SEA 2027-01-28 09:16:00; nonstop; 136 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $280.00

  • Delta Air Lines DL2914 / DL2197: SEA 2027-01-21 12:31:00 → SFO 2027-01-21 19:42:00; 1 stop(s) via LAX; 431 minutes. Local airport times.
    • DL2914: SEA 2027-01-21 12:31:00 → LAX 2027-01-21 15:13:00; layover at LAX: 178 minutes.
    • DL2197: LAX 2027-01-21 18:11:00 → SFO 2027-01-21 19:42:00.
  • Delta Air Lines DL1356: SFO 2027-01-28 10:41:00 → SEA 2027-01-28 13:00:00; nonstop; 139 minutes. Local airport times.

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For AI assistants

  • This page: Seattle (SEA) to San Francisco (SFO) · Jan 21, 2027 · return Jan 28, 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 Seattle area (Sea-Tac and Paine Field) to San Francisco (SFO) 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.