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Ontario → San Francisco

Dec 21, 2026 · return Dec 27, 2026

ONT → SFO1 adulteconomyRound trip

6 flight options · 3 airlines

Nonstop flights

Mon, Dec 21 – Sun, Dec 27

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

Mon, Dec 21 – Sun, Dec 27

United Airlines
1:35 pmONT
1h 30m
Nonstop
3:05 pmSFO
United Airlines
1:45 pmSFO
1h 34m
Nonstop
3:19 pmONT

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Sun, Dec 27

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

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Sun, Dec 27

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

Mon, Dec 21 – Sun, Dec 27

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

Mon, Dec 21 – Sun, Dec 27

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

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 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)
2026-12-21 → 2026-12-27Frontier AirlinesF91159 / F91160$150.452026-10-29T01:52:47Z
2026-12-21 → 2026-12-27United AirlinesUA1375 / UA5592$265.202026-10-29T01:52:47Z
2026-12-21 → 2026-12-27Southwest AirlinesWN2184 + WN496 / WN4361 + WN2401$290.702026-10-29T01:52:47Z
2026-12-21 → 2026-12-27United AirlinesUA1375 / UA552$265.202026-10-29T01:52:47Z
2026-12-21 → 2026-12-27Frontier AirlinesF91159 / F92486 + F91923$187.952026-10-29T01:52:47Z
2026-12-21 → 2026-12-27Frontier AirlinesF94758 + F94157 / F91160$189.452026-10-29T01:52:47Z

2026-12-21 → 2026-12-27 · $150.45

  • Frontier Airlines F91159: ONT 2026-12-21 12:01:00 → SFO 2026-12-21 13:36:00; nonstop; 95 minutes. Local airport times.
  • Frontier Airlines F91160: SFO 2026-12-27 21:56:00 → ONT 2026-12-27 23:23:00; nonstop; 87 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $265.20

  • United Airlines UA1375: ONT 2026-12-21 13:35:00 → SFO 2026-12-21 15:05:00; nonstop; 90 minutes. Local airport times.
  • United Airlines UA5592: SFO 2026-12-27 13:45:00 → ONT 2026-12-27 15:19:00; nonstop; 94 minutes. Local airport times.

2026-12-21 → 2026-12-27 · $290.70

  • Southwest Airlines WN2184 / WN496: ONT 2026-12-21 05:45:00 → SFO 2026-12-21 09:40:00; 1 stop(s) via LAS; 235 minutes. Local airport times.
    • WN2184: ONT 2026-12-21 05:45:00 → LAS 2026-12-21 06:55:00; layover at LAS: 65 minutes.
    • WN496: LAS 2026-12-21 08:00:00 → SFO 2026-12-21 09:40:00.
  • Southwest Airlines WN4361 / WN2401: SFO 2026-12-27 05:10:00 → ONT 2026-12-27 10:40:00; 1 stop(s) via LAS; 330 minutes. Local airport times.
    • WN4361: SFO 2026-12-27 05:10:00 → LAS 2026-12-27 06:45:00; layover at LAS: 170 minutes.
    • WN2401: LAS 2026-12-27 09:35:00 → ONT 2026-12-27 10:40:00.

2026-12-21 → 2026-12-27 · $265.20

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

2026-12-21 → 2026-12-27 · $187.95

  • Frontier Airlines F91159: ONT 2026-12-21 19:26:00 → SFO 2026-12-21 21:01:00; nonstop; 95 minutes. Local airport times.
  • Frontier Airlines F92486 / F91923: SFO 2026-12-27 14:22:00 → ONT 2026-12-27 18:31:00; 1 stop(s) via LAS; 249 minutes. Local airport times.
    • F92486: SFO 2026-12-27 14:22:00 → LAS 2026-12-27 16:10:00; layover at LAS: 75 minutes.
    • F91923: LAS 2026-12-27 17:25:00 → ONT 2026-12-27 18:31:00.

2026-12-21 → 2026-12-27 · $189.45

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

More dates for this route