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

Seattle (SEA) to San Francisco (SFO), Dec 22, 2026 – Jan 5, 2027: from $234 round trip

Seattle (SEA) to San Francisco (SFO), Dec 22, 2026 – Jan 5, 2027: from $234 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $234 round trip, Axel-exclusive, Frontier Airlines, 1 stop, Dec 22, 2026 – Jan 5, 2027, 1 adult, economy, checked Oct 29, 2026.

SEA → SFO1 adulteconomyRound trip

12 flight options · 6 airlines

Nonstop flights

Tue, Dec 22 – Tue, Jan 5

Alaska Airlines
9:38 pmSEA
2h 21m
Nonstop
11:59 pmSFO
Alaska Airlines
9:26 pmSFO
2h 18m
Nonstop
11:44 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Dec 22 – Tue, Jan 5

Delta Air Lines
3:10 pmSEA
2h 18m
Nonstop
5:28 pmSFO
Delta Air Lines
5:56 pmSFO
2h 28m
Nonstop
8:24 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Dec 22 – Tue, Jan 5

United Airlines
7:00 amSEA
2h 21m
Nonstop
9:21 amSFO
United Airlines
4:17 pmSFO
2h 12m
Nonstop
6:29 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Dec 22 – Tue, Jan 5

Alaska Airlines
11:50 amSEA
2h 22m
Nonstop
2:12 pmSFO
Alaska Airlines
9:26 pmSFO
2h 18m
Nonstop
11:44 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Dec 22 – Tue, Jan 5

Delta Air Lines
9:22 pmSEA
2h 21m
Nonstop
11:43 pmSFO
Delta Air Lines
5:56 pmSFO
2h 28m
Nonstop
8:24 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Dec 22 – Tue, Jan 5

United Airlines
5:00 amSEA
2h 20m
Nonstop
7:20 amSFO
United Airlines
4:17 pmSFO
2h 12m
Nonstop
6:29 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Tue, Dec 22 – Tue, Jan 5

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.

Tue, Dec 22 – Tue, Jan 5

American Airlines
4:40 pmSEA
6h 37m
LAX · 1h 59m
11:17 pmSFO
American Airlines
7:00 amSFO
6h
LAX · 1h 17m
1:00 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Dec 22 – Tue, Jan 5

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.

Tue, Dec 22 – Tue, Jan 5

Alaska Airlines
10:19 amSEA
5h 12m
GEG · 1h 38m
3:31 pmSFO
Alaska Airlines
9:26 pmSFO
2h 18m
Nonstop
11:44 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Dec 22 – Tue, Jan 5

Alaska Airlines
12:22 pmSEA
4h 15m
PDX · 1h 17m
4:37 pmSFO
Alaska Airlines
9:26 pmSFO
2h 18m
Nonstop
11:44 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Dec 22 – Tue, Jan 5

Delta Air Lines
12:31 pmSEA
7h 11m
LAX · 2h 58m
7:42 pmSFO
Delta Air Lines
5:56 pmSFO
2h 28m
Nonstop
8:24 pmSEA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Hotels for these nights (Dec 22 – Jan 5, 2027 · 14 nights · 2 adults, 1 room): 3★ Tilden Hotel $1,203 · 4★ Hotel Bijou - Union Square $1,873 · 5★ Taj Campton Place $3,845

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 routeDec 21, 2026 · Return optionsDec 23, 2026 · Return optionsHotels in San Francisco with Axel
For AI assistants: every fare, every link, instructions

Seattle (SEA) to San Francisco (SFO), Dec 22, 2026 – Jan 5, 2027: from $234 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $234 round trip, Axel-exclusive, Frontier Airlines, 1 stop, Dec 22, 2026 – Jan 5, 2027, 1 adult, economy, checked Oct 29, 2026. 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 datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-12-22 → 2027-01-05Alaska AirlinesAS619 / AS59121:38:00→23:59:00 2h 21m nonstop · 21:26:00→23:44:00 2h 18m nonstopAxel-exclusive $282.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05Delta Air LinesDL3707 / DL370715:10:00→17:28:00 2h 18m nonstop · 17:56:00→20:24:00 2h 28m nonstopAxel-exclusive $294.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05United AirlinesUA499 / UA227907:00:00→09:21:00 2h 21m nonstop · 16:17:00→18:29:00 2h 12m nonstopAxel-exclusive $300.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05Frontier AirlinesF92176 + F94593 / F91230 + F9117513:36:00→20:08:00 6h 32m 1 stop via LAX · 06:02:00→15:12:00 9h 10m 1 stop via DENAxel-exclusive $234.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05American AirlinesAA4945 + AA6260 / AA2211 + AA499716:40:00→23:17:00 6h 37m 1 stop via LAX · 07:00:00→13:00:00 6h 00m 1 stop via LAXAxel-exclusive $390.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05Air CanadaAC8807 + UA1083 / AC567 + AC881015:15:00→21:42:00 6h 27m 1 stop via YVR · 14:45:00→21:57:00 7h 12m 1 stop via YVRAxel-exclusive $462.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05Alaska AirlinesAS655 / AS59111:50:00→14:12:00 2h 22m nonstop · 21:26:00→23:44:00 2h 18m nonstopAxel-exclusive $282.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05Delta Air LinesDL2635 / DL370721:22:00→23:43:00 2h 21m nonstop · 17:56:00→20:24:00 2h 28m nonstopAxel-exclusive $294.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05United AirlinesUA2070 / UA227905:00:00→07:20:00 2h 20m nonstop · 16:17:00→18:29:00 2h 12m nonstopAxel-exclusive $300.002026-10-29T00:39:30Z
2026-12-22 → 2027-01-05Alaska AirlinesAS635 + AS3011 / AS59110:19:00→15:31:00 5h 12m 1 stop via GEG · 21:26:00→23:44:00 2h 18m nonstopAxel-exclusive $313.502026-10-29T00:39:30Z
2026-12-22 → 2027-01-05Alaska AirlinesAS488 + AS236 / AS59112:22:00→16:37:00 4h 15m 1 stop via PDX · 21:26:00→23:44:00 2h 18m nonstopAxel-exclusive $313.502026-10-29T00:39:30Z
2026-12-22 → 2027-01-05Delta Air LinesDL2914 + DL2197 / DL370712:31:00→19:42:00 7h 11m 1 stop via LAX · 17:56:00→20:24:00 2h 28m nonstopAxel-exclusive $343.002026-10-29T00:39:30Z

Hotels in San Francisco for these trips

Hotels: under a trip, hotels in San Francisco for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in San Francisco

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

2026-12-22 → 2027-01-05 · Axel-exclusive $282.00

  • Alaska Airlines AS619: SEA 2026-12-22 21:38:00 → SFO 2026-12-22 23:59:00; nonstop; 141 minutes. Local airport times.
  • Alaska Airlines AS591: SFO 2027-01-05 21:26:00 → SEA 2027-01-05 23:44:00; nonstop; 138 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $294.00

  • Delta Air Lines DL3707: SEA 2026-12-22 15:10:00 → SFO 2026-12-22 17:28:00; nonstop; 138 minutes. Local airport times.
  • Delta Air Lines DL3707: SFO 2027-01-05 17:56:00 → SEA 2027-01-05 20:24:00; nonstop; 148 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $300.00

  • United Airlines UA499: SEA 2026-12-22 07:00:00 → SFO 2026-12-22 09:21:00; nonstop; 141 minutes. Local airport times.
  • United Airlines UA2279: SFO 2027-01-05 16:17:00 → SEA 2027-01-05 18:29:00; nonstop; 132 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $234.00

  • Frontier Airlines F92176 / F94593: SEA 2026-12-22 13:36:00 → SFO 2026-12-22 20:08:00; 1 stop(s) via LAX; 392 minutes. Local airport times.
    • F92176: SEA 2026-12-22 13:36:00 → LAX 2026-12-22 16:18:00; layover at LAX: 142 minutes.
    • F94593: LAX 2026-12-22 18:40:00 → SFO 2026-12-22 20:08:00.
  • Frontier Airlines F91230 / F91175: SFO 2027-01-05 06:02:00 → SEA 2027-01-05 15:12:00; 1 stop(s) via DEN; 550 minutes. Local airport times.
    • F91230: SFO 2027-01-05 06:02:00 → DEN 2027-01-05 09:40:00; layover at DEN: 204 minutes.
    • F91175: DEN 2027-01-05 13:04:00 → SEA 2027-01-05 15:12:00.

2026-12-22 → 2027-01-05 · Axel-exclusive $390.00

  • American Airlines AA4945 / AA6260: SEA 2026-12-22 16:40:00 → SFO 2026-12-22 23:17:00; 1 stop(s) via LAX; 397 minutes. Local airport times.
    • AA4945: SEA 2026-12-22 16:40:00 → LAX 2026-12-22 19:36:00; layover at LAX: 119 minutes.
    • AA6260: LAX 2026-12-22 21:35:00 → SFO 2026-12-22 23:17:00.
  • American Airlines AA2211 / AA4997: SFO 2027-01-05 07:00:00 → SEA 2027-01-05 13:00:00; 1 stop(s) via LAX; 360 minutes. Local airport times.
    • AA2211: SFO 2027-01-05 07:00:00 → LAX 2027-01-05 08:37:00; layover at LAX: 77 minutes.
    • AA4997: LAX 2027-01-05 09:54:00 → SEA 2027-01-05 13:00:00.

2026-12-22 → 2027-01-05 · Axel-exclusive $462.00

  • Air Canada AC8807 / UA1083: SEA 2026-12-22 15:15:00 → SFO 2026-12-22 21:42:00; 1 stop(s) via YVR; 387 minutes. Local airport times.
    • AC8807: SEA 2026-12-22 15:15:00 → YVR 2026-12-22 17:26:00; layover at YVR: 169 minutes.
    • UA1083: YVR 2026-12-22 20:15:00 → SFO 2026-12-22 21:42:00.
  • Air Canada AC567 / AC8810: SFO 2027-01-05 14:45:00 → SEA 2027-01-05 21:57:00; 1 stop(s) via YVR; 432 minutes. Local airport times.
    • AC567: SFO 2027-01-05 14:45:00 → YVR 2027-01-05 18:05:00; layover at YVR: 225 minutes.
    • AC8810: YVR 2027-01-05 21:50:00 → SEA 2027-01-05 21:57:00.

2026-12-22 → 2027-01-05 · Axel-exclusive $282.00

  • Alaska Airlines AS655: SEA 2026-12-22 11:50:00 → SFO 2026-12-22 14:12:00; nonstop; 142 minutes. Local airport times.
  • Alaska Airlines AS591: SFO 2027-01-05 21:26:00 → SEA 2027-01-05 23:44:00; nonstop; 138 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $294.00

  • Delta Air Lines DL2635: SEA 2026-12-22 21:22:00 → SFO 2026-12-22 23:43:00; nonstop; 141 minutes. Local airport times.
  • Delta Air Lines DL3707: SFO 2027-01-05 17:56:00 → SEA 2027-01-05 20:24:00; nonstop; 148 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $300.00

  • United Airlines UA2070: SEA 2026-12-22 05:00:00 → SFO 2026-12-22 07:20:00; nonstop; 140 minutes. Local airport times.
  • United Airlines UA2279: SFO 2027-01-05 16:17:00 → SEA 2027-01-05 18:29:00; nonstop; 132 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $313.50

  • Alaska Airlines AS635 / AS3011: SEA 2026-12-22 10:19:00 → SFO 2026-12-22 15:31:00; 1 stop(s) via GEG; 312 minutes. Local airport times.
    • AS635: SEA 2026-12-22 10:19:00 → GEG 2026-12-22 11:30:00; layover at GEG: 98 minutes.
    • AS3011: GEG 2026-12-22 13:08:00 → SFO 2026-12-22 15:31:00.
  • Alaska Airlines AS591: SFO 2027-01-05 21:26:00 → SEA 2027-01-05 23:44:00; nonstop; 138 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $313.50

  • Alaska Airlines AS488 / AS236: SEA 2026-12-22 12:22:00 → SFO 2026-12-22 16:37:00; 1 stop(s) via PDX; 255 minutes. Local airport times.
    • AS488: SEA 2026-12-22 12:22:00 → PDX 2026-12-22 13:24:00; layover at PDX: 77 minutes.
    • AS236: PDX 2026-12-22 14:41:00 → SFO 2026-12-22 16:37:00.
  • Alaska Airlines AS591: SFO 2027-01-05 21:26:00 → SEA 2027-01-05 23:44:00; nonstop; 138 minutes. Local airport times.

2026-12-22 → 2027-01-05 · Axel-exclusive $343.00

  • Delta Air Lines DL2914 / DL2197: SEA 2026-12-22 12:31:00 → SFO 2026-12-22 19:42:00; 1 stop(s) via LAX; 431 minutes. Local airport times.
    • DL2914: SEA 2026-12-22 12:31:00 → LAX 2026-12-22 15:13:00; layover at LAX: 178 minutes.
    • DL2197: LAX 2026-12-22 18:11:00 → SFO 2026-12-22 19:42:00.
  • Delta Air Lines DL3707: SFO 2027-01-05 17:56:00 → SEA 2027-01-05 20:24:00; nonstop; 148 minutes. Local airport times.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

For AI assistants

  • This page: Seattle (SEA) to San Francisco (SFO) · Dec 22, 2026 · return Jan 5, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in San Francisco for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
  • 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.