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Billings → San Francisco

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BIL → SFO1 adulteconomy

12 flight options · 4 airlines

Round-trip flights

Fri, Nov 27 – Fri, Dec 4

Alaska Airlines
5:12 pmBIL
6h 34m
SEA · 2h 10m
10:46 pmSFO
Alaska Airlines
3:58 pmSFO
6h
SEA · 1h 51m
10:58 pmBIL

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

United Airlines
2:33 pmBIL
7h 37m
DEN · 3h 4m
9:10 pmSFO
United Airlines
6:20 amSFO
6h 5m
DEN · 1h 45m
1:25 pmBIL

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Delta Air Lines
6:21 pmBIL
5h 8m
SLC · 1h 15m
10:29 pmSFO
Delta Air Lines
5:15 pmSFO
4h 40m
SLC · 1h 25m
10:55 pmBIL

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

American Airlines
7:35 amBIL
7h 35m
PHX · 2h 24m
2:10 pmSFO
United Airlines
6:20 amSFO
6h 5m
DEN · 1h 45m
1:25 pmBIL

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Alaska Airlines
5:12 pmBIL
6h 34m
SEA · 2h 10m
10:46 pmSFO
Alaska Airlines
3:58 pmSFO
6h
SEA · 1h 51m
10:58 pmBIL

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

United Airlines
2:33 pmBIL
7h 37m
DEN · 3h 4m
9:10 pmSFO
United Airlines
6:20 amSFO
6h 5m
DEN · 1h 45m
1:25 pmBIL

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Delta Air Lines
6:21 pmBIL
5h 8m
SLC · 1h 15m
10:29 pmSFO
Delta Air Lines
5:15 pmSFO
4h 40m
SLC · 1h 25m
10:55 pmBIL

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

American Airlines
7:35 amBIL
7h 35m
PHX · 2h 24m
2:10 pmSFO
Delta Air Lines
5:15 pmSFO
4h 40m
SLC · 1h 25m
10:55 pmBIL

Round-trip total · 1 adult · Taxes included

One-way flights

Fri, Nov 20 · One way

Alaska Airlines
5:12 pmBIL
6h 34m
SEA · 2h 10m
10:46 pmSFO

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

United Airlines
2:33 pmBIL
7h 37m
DEN · 3h 4m
9:10 pmSFO

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Delta Air Lines
6:21 pmBIL
5h 8m
SLC · 1h 15m
10:29 pmSFO

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

American Airlines
7:35 amBIL
7h 35m
PHX · 2h 24m
2:10 pmSFO

One-way total · 1 adult · Taxes included

Make this trip yours

BIL ⇄ SFO

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.
  • 24-hour cancellationCancel within 24 hours of booking for a full refund when your departure is at least 7 days away. Closer to departure, the airline’s fare rules apply. 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

More dates

Nov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
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.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-11-20 · one wayAlaska AirlinesAS2354 + AS619$205.002026-10-29T00:49:20Z
2026-11-20 · one wayUnited AirlinesUA478 + UA1389$215.002026-10-29T00:49:20Z
2026-11-20 · one wayDelta Air LinesDL3828 + DL2762$220.002026-10-29T00:49:20Z
2026-11-20 · one wayAmerican AirlinesAA3465 + AA2423$235.002026-10-29T00:49:20Z
2026-11-27 → 2026-12-04Alaska AirlinesAS2354 + AS619 / AS630 + AS2457$421.882026-10-29T00:49:20Z
2026-11-27 → 2026-12-04United AirlinesUA478 + UA1389 / UA2742 + UA703$444.382026-10-29T00:49:20Z
2026-11-20 → 2026-11-23Delta Air LinesDL3828 + DL2762 / DL1088 + DL1340$450.002026-10-29T00:49:20Z
2026-11-20 → 2026-11-23American Airlines / United AirlinesAA3465 + AA2423 / UA2742 + UA703$461.882026-10-29T00:49:20Z
2026-11-20 → 2026-11-23Alaska AirlinesAS2354 + AS619 / AS630 + AS2457$421.882026-10-29T00:49:20Z
2026-11-20 → 2026-11-23United AirlinesUA478 + UA1389 / UA2742 + UA703$444.382026-10-29T00:49:20Z
2026-11-27 → 2026-12-04Delta Air LinesDL3828 + DL2762 / DL1088 + DL1340$450.002026-10-29T00:49:20Z
2026-11-27 → 2026-12-04American Airlines / Delta Air LinesAA3465 + AA2423 / DL1088 + DL1340$468.752026-10-29T00:49:20Z

2026-11-20 · one way · $205.00

  • Alaska Airlines AS2354 / AS619: BIL 2026-11-20 17:12:00 → SFO 2026-11-20 22:46:00; 1 stop(s) via SEA; 394 minutes. Local airport times.
    • AS2354: BIL 2026-11-20 17:12:00 → SEA 2026-11-20 18:25:00; layover at SEA: 130 minutes.
    • AS619: SEA 2026-11-20 20:35:00 → SFO 2026-11-20 22:46:00.

2026-11-20 · one way · $215.00

  • United Airlines UA478 / UA1389: BIL 2026-11-20 14:33:00 → SFO 2026-11-20 21:10:00; 1 stop(s) via DEN; 457 minutes. Local airport times.
    • UA478: BIL 2026-11-20 14:33:00 → DEN 2026-11-20 16:16:00; layover at DEN: 184 minutes.
    • UA1389: DEN 2026-11-20 19:20:00 → SFO 2026-11-20 21:10:00.

2026-11-20 · one way · $220.00

  • Delta Air Lines DL3828 / DL2762: BIL 2026-11-20 18:21:00 → SFO 2026-11-20 22:29:00; 1 stop(s) via SLC; 308 minutes. Local airport times.
    • DL3828: BIL 2026-11-20 18:21:00 → SLC 2026-11-20 20:00:00; layover at SLC: 75 minutes.
    • DL2762: SLC 2026-11-20 21:15:00 → SFO 2026-11-20 22:29:00.

2026-11-20 · one way · $235.00

  • American Airlines AA3465 / AA2423: BIL 2026-11-20 07:35:00 → SFO 2026-11-20 14:10:00; 1 stop(s) via PHX; 455 minutes. Local airport times.
    • AA3465: BIL 2026-11-20 07:35:00 → PHX 2026-11-20 10:31:00; layover at PHX: 144 minutes.
    • AA2423: PHX 2026-11-20 12:55:00 → SFO 2026-11-20 14:10:00.

2026-11-27 → 2026-12-04 · $421.88

  • Alaska Airlines AS2354 / AS619: BIL 2026-11-27 17:12:00 → SFO 2026-11-27 22:46:00; 1 stop(s) via SEA; 394 minutes. Local airport times.
    • AS2354: BIL 2026-11-27 17:12:00 → SEA 2026-11-27 18:25:00; layover at SEA: 130 minutes.
    • AS619: SEA 2026-11-27 20:35:00 → SFO 2026-11-27 22:46:00.
  • Alaska Airlines AS630 / AS2457: SFO 2026-12-04 15:58:00 → BIL 2026-12-04 22:58:00; 1 stop(s) via SEA; 360 minutes. Local airport times.
    • AS630: SFO 2026-12-04 15:58:00 → SEA 2026-12-04 18:13:00; layover at SEA: 111 minutes.
    • AS2457: SEA 2026-12-04 20:04:00 → BIL 2026-12-04 22:58:00.

2026-11-27 → 2026-12-04 · $444.38

  • United Airlines UA478 / UA1389: BIL 2026-11-27 14:33:00 → SFO 2026-11-27 21:10:00; 1 stop(s) via DEN; 457 minutes. Local airport times.
    • UA478: BIL 2026-11-27 14:33:00 → DEN 2026-11-27 16:16:00; layover at DEN: 184 minutes.
    • UA1389: DEN 2026-11-27 19:20:00 → SFO 2026-11-27 21:10:00.
  • United Airlines UA2742 / UA703: SFO 2026-12-04 06:20:00 → BIL 2026-12-04 13:25:00; 1 stop(s) via DEN; 365 minutes. Local airport times.
    • UA2742: SFO 2026-12-04 06:20:00 → DEN 2026-12-04 10:00:00; layover at DEN: 105 minutes.
    • UA703: DEN 2026-12-04 11:45:00 → BIL 2026-12-04 13:25:00.

2026-11-20 → 2026-11-23 · $450.00

  • Delta Air Lines DL3828 / DL2762: BIL 2026-11-20 18:21:00 → SFO 2026-11-20 22:29:00; 1 stop(s) via SLC; 308 minutes. Local airport times.
    • DL3828: BIL 2026-11-20 18:21:00 → SLC 2026-11-20 20:00:00; layover at SLC: 75 minutes.
    • DL2762: SLC 2026-11-20 21:15:00 → SFO 2026-11-20 22:29:00.
  • Delta Air Lines DL1088 / DL1340: SFO 2026-11-23 17:15:00 → BIL 2026-11-23 22:55:00; 1 stop(s) via SLC; 280 minutes. Local airport times.
    • DL1088: SFO 2026-11-23 17:15:00 → SLC 2026-11-23 20:05:00; layover at SLC: 85 minutes.
    • DL1340: SLC 2026-11-23 21:30:00 → BIL 2026-11-23 22:55:00.

2026-11-20 → 2026-11-23 · $461.88

  • American Airlines AA3465 / AA2423: BIL 2026-11-20 07:35:00 → SFO 2026-11-20 14:10:00; 1 stop(s) via PHX; 455 minutes. Local airport times.
    • AA3465: BIL 2026-11-20 07:35:00 → PHX 2026-11-20 10:31:00; layover at PHX: 144 minutes.
    • AA2423: PHX 2026-11-20 12:55:00 → SFO 2026-11-20 14:10:00.
  • United Airlines UA2742 / UA703: SFO 2026-11-23 06:20:00 → BIL 2026-11-23 13:25:00; 1 stop(s) via DEN; 365 minutes. Local airport times.
    • UA2742: SFO 2026-11-23 06:20:00 → DEN 2026-11-23 10:00:00; layover at DEN: 105 minutes.
    • UA703: DEN 2026-11-23 11:45:00 → BIL 2026-11-23 13:25:00.

2026-11-20 → 2026-11-23 · $421.88

  • Alaska Airlines AS2354 / AS619: BIL 2026-11-20 17:12:00 → SFO 2026-11-20 22:46:00; 1 stop(s) via SEA; 394 minutes. Local airport times.
    • AS2354: BIL 2026-11-20 17:12:00 → SEA 2026-11-20 18:25:00; layover at SEA: 130 minutes.
    • AS619: SEA 2026-11-20 20:35:00 → SFO 2026-11-20 22:46:00.
  • Alaska Airlines AS630 / AS2457: SFO 2026-11-23 15:58:00 → BIL 2026-11-23 22:58:00; 1 stop(s) via SEA; 360 minutes. Local airport times.
    • AS630: SFO 2026-11-23 15:58:00 → SEA 2026-11-23 18:13:00; layover at SEA: 111 minutes.
    • AS2457: SEA 2026-11-23 20:04:00 → BIL 2026-11-23 22:58:00.

2026-11-20 → 2026-11-23 · $444.38

  • United Airlines UA478 / UA1389: BIL 2026-11-20 14:33:00 → SFO 2026-11-20 21:10:00; 1 stop(s) via DEN; 457 minutes. Local airport times.
    • UA478: BIL 2026-11-20 14:33:00 → DEN 2026-11-20 16:16:00; layover at DEN: 184 minutes.
    • UA1389: DEN 2026-11-20 19:20:00 → SFO 2026-11-20 21:10:00.
  • United Airlines UA2742 / UA703: SFO 2026-11-23 06:20:00 → BIL 2026-11-23 13:25:00; 1 stop(s) via DEN; 365 minutes. Local airport times.
    • UA2742: SFO 2026-11-23 06:20:00 → DEN 2026-11-23 10:00:00; layover at DEN: 105 minutes.
    • UA703: DEN 2026-11-23 11:45:00 → BIL 2026-11-23 13:25:00.

2026-11-27 → 2026-12-04 · $450.00

  • Delta Air Lines DL3828 / DL2762: BIL 2026-11-27 18:21:00 → SFO 2026-11-27 22:29:00; 1 stop(s) via SLC; 308 minutes. Local airport times.
    • DL3828: BIL 2026-11-27 18:21:00 → SLC 2026-11-27 20:00:00; layover at SLC: 75 minutes.
    • DL2762: SLC 2026-11-27 21:15:00 → SFO 2026-11-27 22:29:00.
  • Delta Air Lines DL1088 / DL1340: SFO 2026-12-04 17:15:00 → BIL 2026-12-04 22:55:00; 1 stop(s) via SLC; 280 minutes. Local airport times.
    • DL1088: SFO 2026-12-04 17:15:00 → SLC 2026-12-04 20:05:00; layover at SLC: 85 minutes.
    • DL1340: SLC 2026-12-04 21:30:00 → BIL 2026-12-04 22:55:00.

2026-11-27 → 2026-12-04 · $468.75

  • American Airlines AA3465 / AA2423: BIL 2026-11-27 07:35:00 → SFO 2026-11-27 14:10:00; 1 stop(s) via PHX; 455 minutes. Local airport times.
    • AA3465: BIL 2026-11-27 07:35:00 → PHX 2026-11-27 10:31:00; layover at PHX: 144 minutes.
    • AA2423: PHX 2026-11-27 12:55:00 → SFO 2026-11-27 14:10:00.
  • Delta Air Lines DL1088 / DL1340: SFO 2026-12-04 17:15:00 → BIL 2026-12-04 22:55:00; 1 stop(s) via SLC; 280 minutes. Local airport times.
    • DL1088: SFO 2026-12-04 17:15:00 → SLC 2026-12-04 20:05:00; layover at SLC: 85 minutes.
    • DL1340: SLC 2026-12-04 21:30:00 → BIL 2026-12-04 22:55:00.

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