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Ontario → San Francisco

Jan 21, 2027 · return Jan 24, 2027

ONT → SFO1 adulteconomyRound trip

6 flight options · 3 airlines

Nonstop flights

Thu, Jan 21 – Sun, Jan 24

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

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Sun, Jan 24

United Airlines
1:35 pmONT
1h 30m
Nonstop
3:05 pmSFO
United Airlines
9:30 pmSFO
1h 23m
Nonstop
10:53 pmONT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Sun, Jan 24

United Airlines
9:25 amONT
1h 30m
Nonstop
10:55 amSFO
United Airlines
9:30 pmSFO
1h 23m
Nonstop
10:53 pmONT

Round-trip total · 1 adult · Taxes included

One-stop flights

Thu, Jan 21 – Sun, Jan 24

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

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Sun, Jan 24

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

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Sun, Jan 24

Frontier Airlines
7:26 pmONT
1h 35m
Nonstop
9:01 pmSFO
Frontier Airlines
2:22 pmSFO
4h 9m
LAS · 1h 15m
6:31 pmONT

Round-trip total · 1 adult · Taxes included

Make this trip yours

ONT ⇄ SFO

Economy

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

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More dates

All dates for this routeNov 24, 2026 → Nov 29, 2026Dec 22, 2026 → Dec 27, 2026Dec 30, 2026 → Jan 2, 2027Jan 15, 2027 → Jan 18, 2027Oct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Jan 22, 2027 → Jan 25, 2027Oct 30, 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)
2027-01-21 → 2027-01-24Frontier AirlinesF91159 / F91160$112.102026-10-29T01:52:47Z
2027-01-21 → 2027-01-24United AirlinesUA1375 / UA552$197.602026-10-29T01:52:47Z
2027-01-21 → 2027-01-24Southwest AirlinesWN2184 + WN496 / WN4361 + WN2401$216.602026-10-29T01:52:47Z
2027-01-21 → 2027-01-24United AirlinesUA432 / UA552$197.602026-10-29T01:52:47Z
2027-01-21 → 2027-01-24Frontier AirlinesF94758 + F94157 / F91160$140.602026-10-29T01:52:47Z
2027-01-21 → 2027-01-24Frontier AirlinesF91159 / F92486 + F91923$140.602026-10-29T01:52:47Z

2027-01-21 → 2027-01-24 · $112.10

  • Frontier Airlines F91159: ONT 2027-01-21 12:01:00 → SFO 2027-01-21 13:36:00; nonstop; 95 minutes. Local airport times.
  • Frontier Airlines F91160: SFO 2027-01-24 21:56:00 → ONT 2027-01-24 23:23:00; nonstop; 87 minutes. Local airport times.

2027-01-21 → 2027-01-24 · $197.60

  • United Airlines UA1375: ONT 2027-01-21 13:35:00 → SFO 2027-01-21 15:05:00; nonstop; 90 minutes. Local airport times.
  • United Airlines UA552: SFO 2027-01-24 21:30:00 → ONT 2027-01-24 22:53:00; nonstop; 83 minutes. Local airport times.

2027-01-21 → 2027-01-24 · $216.60

  • Southwest Airlines WN2184 / WN496: ONT 2027-01-21 05:45:00 → SFO 2027-01-21 09:40:00; 1 stop(s) via LAS; 235 minutes. Local airport times.
    • WN2184: ONT 2027-01-21 05:45:00 → LAS 2027-01-21 06:55:00; layover at LAS: 65 minutes.
    • WN496: LAS 2027-01-21 08:00:00 → SFO 2027-01-21 09:40:00.
  • Southwest Airlines WN4361 / WN2401: SFO 2027-01-24 05:10:00 → ONT 2027-01-24 10:40:00; 1 stop(s) via LAS; 330 minutes. Local airport times.
    • WN4361: SFO 2027-01-24 05:10:00 → LAS 2027-01-24 06:45:00; layover at LAS: 170 minutes.
    • WN2401: LAS 2027-01-24 09:35:00 → ONT 2027-01-24 10:40:00.

2027-01-21 → 2027-01-24 · $197.60

  • United Airlines UA432: ONT 2027-01-21 09:25:00 → SFO 2027-01-21 10:55:00; nonstop; 90 minutes. Local airport times.
  • United Airlines UA552: SFO 2027-01-24 21:30:00 → ONT 2027-01-24 22:53:00; nonstop; 83 minutes. Local airport times.

2027-01-21 → 2027-01-24 · $140.60

  • Frontier Airlines F94758 / F94157: ONT 2027-01-21 14:23:00 → SFO 2027-01-21 18:26:00; 1 stop(s) via LAS; 243 minutes. Local airport times.
    • F94758: ONT 2027-01-21 14:23:00 → LAS 2027-01-21 15:31:00; layover at LAS: 71 minutes.
    • F94157: LAS 2027-01-21 16:42:00 → SFO 2027-01-21 18:26:00.
  • Frontier Airlines F91160: SFO 2027-01-24 21:56:00 → ONT 2027-01-24 23:23:00; nonstop; 87 minutes. Local airport times.

2027-01-21 → 2027-01-24 · $140.60

  • Frontier Airlines F91159: ONT 2027-01-21 19:26:00 → SFO 2027-01-21 21:01:00; nonstop; 95 minutes. Local airport times.
  • Frontier Airlines F92486 / F91923: SFO 2027-01-24 14:22:00 → ONT 2027-01-24 18:31:00; 1 stop(s) via LAS; 249 minutes. Local airport times.
    • F92486: SFO 2027-01-24 14:22:00 → LAS 2027-01-24 16:10:00; layover at LAS: 75 minutes.
    • F91923: LAS 2027-01-24 17:25:00 → ONT 2027-01-24 18:31:00.

More dates for this route