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San Francisco → Ontario

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SFO → ONT1 adulteconomy

15 flight options · 3 airlines

Round-trip flights

Fri, Nov 20 – Mon, Nov 23

Frontier Airlines
9:56 pmSFO
1h 27m
Nonstop
11:23 pmONT
Frontier Airlines
12:01 pmONT
1h 35m
Nonstop
1:36 pmSFO

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

United Airlines
9:30 pmSFO
1h 23m
Nonstop
10:53 pmONT
United Airlines
11:20 amONT
1h 30m
Nonstop
12:50 pmSFO

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Southwest Airlines
5:10 amSFO
5h 30m
LAS · 2h 50m
10:40 amONT
Southwest Airlines
5:45 amONT
3h 55m
LAS · 1h 5m
9:40 amSFO

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

United Airlines
4:35 pmSFO
1h 26m
Nonstop
6:01 pmONT
United Airlines
11:20 amONT
1h 30m
Nonstop
12:50 pmSFO

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

United Airlines
4:35 pmSFO
1h 26m
Nonstop
6:01 pmONT
United Airlines
11:20 amONT
1h 30m
Nonstop
12:50 pmSFO

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

United Airlines
9:30 pmSFO
1h 23m
Nonstop
10:53 pmONT
United Airlines
11:20 amONT
1h 30m
Nonstop
12:50 pmSFO

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Frontier Airlines
2:22 pmSFO
4h 9m
LAS · 1h 15m
6:31 pmONT
Frontier Airlines
12:01 pmONT
1h 35m
Nonstop
1:36 pmSFO

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Frontier Airlines
9:56 pmSFO
1h 27m
Nonstop
11:23 pmONT
Frontier Airlines
2:23 pmONT
4h 3m
LAS · 1h 11m
6:26 pmSFO

Round-trip total · 1 adult · Taxes included

Show 2 more flights

Fri, Nov 27 – Fri, Dec 4

Frontier Airlines
2:22 pmSFO
4h 9m
LAS · 1h 15m
6:31 pmONT
Frontier Airlines
2:23 pmONT
4h 3m
LAS · 1h 11m
6:26 pmSFO

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Southwest Airlines
5:10 amSFO
5h 30m
LAS · 2h 50m
10:40 amONT
Southwest Airlines
5:45 amONT
3h 55m
LAS · 1h 5m
9:40 amSFO

Round-trip total · 1 adult · Taxes included

One-way flights

Fri, Nov 20 · One way

Frontier Airlines
9:56 pmSFO
1h 27m
Nonstop
11:23 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

United Airlines
9:30 pmSFO
1h 23m
Nonstop
10:53 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Southwest Airlines
5:10 amSFO
5h 30m
LAS · 2h 50m
10:40 amONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

United Airlines
4:35 pmSFO
1h 26m
Nonstop
6:01 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Frontier Airlines
2:22 pmSFO
4h 9m
LAS · 1h 15m
6:31 pmONT

One-way total · 1 adult · Taxes included

Make this trip yours

SFO ⇄ ONT

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, Frontier 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 wayFrontier AirlinesF91160$65.002026-10-29T01:18:59Z
2026-11-20 · one wayUnited AirlinesUA552$125.002026-10-29T01:18:59Z
2026-11-20 → 2026-11-23Frontier AirlinesF91160 / F91159$125.002026-10-29T01:18:59Z
2026-11-20 → 2026-11-23United AirlinesUA552 / UA1375$235.002026-10-29T01:18:59Z
2026-11-20 · one waySouthwest AirlinesWN4361 + WN2401$145.002026-10-29T01:18:59Z
2026-11-20 → 2026-11-23Southwest AirlinesWN4361 + WN2401 / WN2184 + WN496$280.002026-10-29T01:18:59Z
2026-11-27 → 2026-12-04United AirlinesUA436 / UA1375$282.002026-10-29T01:18:59Z
2026-11-20 · one wayUnited AirlinesUA436$125.002026-10-29T01:18:59Z
2026-11-20 → 2026-11-23United AirlinesUA436 / UA1375$235.002026-10-29T01:18:59Z
2026-11-27 → 2026-12-04United AirlinesUA552 / UA1375$282.002026-10-29T01:18:59Z
2026-11-20 · one wayFrontier AirlinesF92486 + F91923$100.002026-10-29T01:18:59Z
2026-11-20 → 2026-11-23Frontier AirlinesF92486 + F91923 / F91159$157.502026-10-29T01:18:59Z
2026-11-27 → 2026-12-04Frontier AirlinesF91160 / F94758 + F94157$182.502026-10-29T01:18:59Z
2026-11-27 → 2026-12-04Frontier AirlinesF92486 + F91923 / F94758 + F94157$228.002026-10-29T01:18:59Z
2026-11-27 → 2026-12-04Southwest AirlinesWN4361 + WN2401 / WN2184 + WN496$336.002026-10-29T01:18:59Z

2026-11-20 · one way · $65.00

  • Frontier Airlines F91160: SFO 2026-11-20 21:56:00 → ONT 2026-11-20 23:23:00; nonstop; 87 minutes. Local airport times.

2026-11-20 · one way · $125.00

  • United Airlines UA552: SFO 2026-11-20 21:30:00 → ONT 2026-11-20 22:53:00; nonstop; 83 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $125.00

  • Frontier Airlines F91160: SFO 2026-11-20 21:56:00 → ONT 2026-11-20 23:23:00; nonstop; 87 minutes. Local airport times.
  • Frontier Airlines F91159: ONT 2026-11-23 12:01:00 → SFO 2026-11-23 13:36:00; nonstop; 95 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $235.00

  • United Airlines UA552: SFO 2026-11-20 21:30:00 → ONT 2026-11-20 22:53:00; nonstop; 83 minutes. Local airport times.
  • United Airlines UA1375: ONT 2026-11-23 11:20:00 → SFO 2026-11-23 12:50:00; nonstop; 90 minutes. Local airport times.

2026-11-20 · one way · $145.00

  • Southwest Airlines WN4361 / WN2401: SFO 2026-11-20 05:10:00 → ONT 2026-11-20 10:40:00; 1 stop(s) via LAS; 330 minutes. Local airport times.
    • WN4361: SFO 2026-11-20 05:10:00 → LAS 2026-11-20 06:45:00; layover at LAS: 170 minutes.
    • WN2401: LAS 2026-11-20 09:35:00 → ONT 2026-11-20 10:40:00.

2026-11-20 → 2026-11-23 · $280.00

  • Southwest Airlines WN4361 / WN2401: SFO 2026-11-20 05:10:00 → ONT 2026-11-20 10:40:00; 1 stop(s) via LAS; 330 minutes. Local airport times.
    • WN4361: SFO 2026-11-20 05:10:00 → LAS 2026-11-20 06:45:00; layover at LAS: 170 minutes.
    • WN2401: LAS 2026-11-20 09:35:00 → ONT 2026-11-20 10:40:00.
  • Southwest Airlines WN2184 / WN496: ONT 2026-11-23 05:45:00 → SFO 2026-11-23 09:40:00; 1 stop(s) via LAS; 235 minutes. Local airport times.
    • WN2184: ONT 2026-11-23 05:45:00 → LAS 2026-11-23 06:55:00; layover at LAS: 65 minutes.
    • WN496: LAS 2026-11-23 08:00:00 → SFO 2026-11-23 09:40:00.

2026-11-27 → 2026-12-04 · $282.00

  • United Airlines UA436: SFO 2026-11-27 16:35:00 → ONT 2026-11-27 18:01:00; nonstop; 86 minutes. Local airport times.
  • United Airlines UA1375: ONT 2026-12-04 11:20:00 → SFO 2026-12-04 12:50:00; nonstop; 90 minutes. Local airport times.

2026-11-20 · one way · $125.00

  • United Airlines UA436: SFO 2026-11-20 16:35:00 → ONT 2026-11-20 18:01:00; nonstop; 86 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $235.00

  • United Airlines UA436: SFO 2026-11-20 16:35:00 → ONT 2026-11-20 18:01:00; nonstop; 86 minutes. Local airport times.
  • United Airlines UA1375: ONT 2026-11-23 11:20:00 → SFO 2026-11-23 12:50:00; nonstop; 90 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $282.00

  • United Airlines UA552: SFO 2026-11-27 21:30:00 → ONT 2026-11-27 22:53:00; nonstop; 83 minutes. Local airport times.
  • United Airlines UA1375: ONT 2026-12-04 11:20:00 → SFO 2026-12-04 12:50:00; nonstop; 90 minutes. Local airport times.

2026-11-20 · one way · $100.00

  • Frontier Airlines F92486 / F91923: SFO 2026-11-20 14:22:00 → ONT 2026-11-20 18:31:00; 1 stop(s) via LAS; 249 minutes. Local airport times.
    • F92486: SFO 2026-11-20 14:22:00 → LAS 2026-11-20 16:10:00; layover at LAS: 75 minutes.
    • F91923: LAS 2026-11-20 17:25:00 → ONT 2026-11-20 18:31:00.

2026-11-20 → 2026-11-23 · $157.50

  • Frontier Airlines F92486 / F91923: SFO 2026-11-20 14:22:00 → ONT 2026-11-20 18:31:00; 1 stop(s) via LAS; 249 minutes. Local airport times.
    • F92486: SFO 2026-11-20 14:22:00 → LAS 2026-11-20 16:10:00; layover at LAS: 75 minutes.
    • F91923: LAS 2026-11-20 17:25:00 → ONT 2026-11-20 18:31:00.
  • Frontier Airlines F91159: ONT 2026-11-23 12:01:00 → SFO 2026-11-23 13:36:00; nonstop; 95 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $182.50

  • Frontier Airlines F91160: SFO 2026-11-27 21:56:00 → ONT 2026-11-27 23:23:00; nonstop; 87 minutes. Local airport times.
  • Frontier Airlines F94758 / F94157: ONT 2026-12-04 14:23:00 → SFO 2026-12-04 18:26:00; 1 stop(s) via LAS; 243 minutes. Local airport times.
    • F94758: ONT 2026-12-04 14:23:00 → LAS 2026-12-04 15:31:00; layover at LAS: 71 minutes.
    • F94157: LAS 2026-12-04 16:42:00 → SFO 2026-12-04 18:26:00.

2026-11-27 → 2026-12-04 · $228.00

  • Frontier Airlines F92486 / F91923: SFO 2026-11-27 14:22:00 → ONT 2026-11-27 18:31:00; 1 stop(s) via LAS; 249 minutes. Local airport times.
    • F92486: SFO 2026-11-27 14:22:00 → LAS 2026-11-27 16:10:00; layover at LAS: 75 minutes.
    • F91923: LAS 2026-11-27 17:25:00 → ONT 2026-11-27 18:31:00.
  • Frontier Airlines F94758 / F94157: ONT 2026-12-04 14:23:00 → SFO 2026-12-04 18:26:00; 1 stop(s) via LAS; 243 minutes. Local airport times.
    • F94758: ONT 2026-12-04 14:23:00 → LAS 2026-12-04 15:31:00; layover at LAS: 71 minutes.
    • F94157: LAS 2026-12-04 16:42:00 → SFO 2026-12-04 18:26:00.

2026-11-27 → 2026-12-04 · $336.00

  • Southwest Airlines WN4361 / WN2401: SFO 2026-11-27 05:10:00 → ONT 2026-11-27 10:40:00; 1 stop(s) via LAS; 330 minutes. Local airport times.
    • WN4361: SFO 2026-11-27 05:10:00 → LAS 2026-11-27 06:45:00; layover at LAS: 170 minutes.
    • WN2401: LAS 2026-11-27 09:35:00 → ONT 2026-11-27 10:40:00.
  • Southwest Airlines WN2184 / WN496: ONT 2026-12-04 05:45:00 → SFO 2026-12-04 09:40:00; 1 stop(s) via LAS; 235 minutes. Local airport times.
    • WN2184: ONT 2026-12-04 05:45:00 → LAS 2026-12-04 06:55:00; layover at LAS: 65 minutes.
    • WN496: LAS 2026-12-04 08:00:00 → SFO 2026-12-04 09:40:00.

More dates for this route