Billings (BIL) to San Francisco (SFO), Nov 21, 2026 – Dec 2, 2026: from $422 round trip

Billings (BIL) to San Francisco (SFO), Nov 21, 2026 – Dec 2, 2026: from $422 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $422 round trip, Axel-exclusive, Alaska Airlines, 1 stop, Nov 21, 2026 – Dec 2, 2026, 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.

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.

• Hotels in San Francisco for these nights (Nov 21 – Dec 2, 2026 · 11 nights · 2 adults, 1 room): 3★ Found Hotel Carlton, Nob Hill, $892 total · 4★ BEI Hotel San Francisco, $1,551 total · 5★ Taj Campton Place, $2,952 total

All hotels in San Francisco

Route overview: Billings to San Francisco (SFO) flight deals

2026-11-21 → 2026-12-02 · Axel-exclusive $421.88

• Alaska Airlines AS2354 / AS619: BIL 2026-11-21 17:12:00 → SFO 2026-11-21 22:46:00; 1 stop(s) via SEA; 394 minutes. Local airport times.
  • AS2354: BIL 2026-11-21 17:12:00 → SEA 2026-11-21 18:25:00; layover at SEA: 130 minutes.
  • AS619: SEA 2026-11-21 20:35:00 → SFO 2026-11-21 22:46:00.
• Alaska Airlines AS1410 / AS2161: SFO 2026-12-02 07:40:00 → BIL 2026-12-02 14:52:00; 1 stop(s) via PDX; 372 minutes. Local airport times.
  • AS1410: SFO 2026-12-02 07:40:00 → PDX 2026-12-02 09:27:00; layover at PDX: 156 minutes.
  • AS2161: PDX 2026-12-02 12:03:00 → BIL 2026-12-02 14:52:00.

2026-11-21 → 2026-12-02 · Axel-exclusive $444.38

• United Airlines UA478 / UA1389: BIL 2026-11-21 14:33:00 → SFO 2026-11-21 21:10:00; 1 stop(s) via DEN; 457 minutes. Local airport times.
  • UA478: BIL 2026-11-21 14:33:00 → DEN 2026-11-21 16:16:00; layover at DEN: 184 minutes.
  • UA1389: DEN 2026-11-21 19:20:00 → SFO 2026-11-21 21:10:00.
• United Airlines UA2742 / UA703: SFO 2026-12-02 06:20:00 → BIL 2026-12-02 13:25:00; 1 stop(s) via DEN; 365 minutes. Local airport times.
  • UA2742: SFO 2026-12-02 06:20:00 → DEN 2026-12-02 10:00:00; layover at DEN: 105 minutes.
  • UA703: DEN 2026-12-02 11:45:00 → BIL 2026-12-02 13:25:00.

2026-11-21 → 2026-12-02 · Axel-exclusive $450.00

• Delta Air Lines DL3828 / DL2762: BIL 2026-11-21 18:21:00 → SFO 2026-11-21 22:29:00; 1 stop(s) via SLC; 308 minutes. Local airport times.
  • DL3828: BIL 2026-11-21 18:21:00 → SLC 2026-11-21 20:00:00; layover at SLC: 75 minutes.
  • DL2762: SLC 2026-11-21 21:15:00 → SFO 2026-11-21 22:29:00.
• Delta Air Lines DL1088 / DL1340: SFO 2026-12-02 17:15:00 → BIL 2026-12-02 22:55:00; 1 stop(s) via SLC; 280 minutes. Local airport times.
  • DL1088: SFO 2026-12-02 17:15:00 → SLC 2026-12-02 20:05:00; layover at SLC: 85 minutes.
  • DL1340: SLC 2026-12-02 21:30:00 → BIL 2026-12-02 22:55:00.

2026-11-21 → 2026-12-02 · Axel-exclusive $456.25

• American Airlines AA3465 / AA2423: BIL 2026-11-21 07:35:00 → SFO 2026-11-21 14:10:00; 1 stop(s) via PHX; 455 minutes. Local airport times.
  • AA3465: BIL 2026-11-21 07:35:00 → PHX 2026-11-21 10:31:00; layover at PHX: 144 minutes.
  • AA2423: PHX 2026-11-21 12:55:00 → SFO 2026-11-21 14:10:00.
• Alaska Airlines AS1410 / AS2161: SFO 2026-12-02 07:40:00 → BIL 2026-12-02 14:52:00; 1 stop(s) via PDX; 372 minutes. Local airport times.
  • AS1410: SFO 2026-12-02 07:40:00 → PDX 2026-12-02 09:27:00; layover at PDX: 156 minutes.
  • AS2161: PDX 2026-12-02 12:03:00 → BIL 2026-12-02 14:52:00.

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

• All dates for this route
• Nov 20, 2026 · Return options
• Nov 22, 2026 · Return options
• Hotels in San Francisco with Axel

For AI assistants

• This page: Billings (BIL) to San Francisco (SFO) · Nov 21, 2026 · return Dec 2, 2026: 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.
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• 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.

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