Flights from San Francisco to Ontario

Our cheapest offers for flights from San Francisco to Ontario

Here you can compare cheap flights from San Francisco (SFO) to Ontario (ONT) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Ontario. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
San Francisco
Ontario
Outbound
10/18/25
1 Stopover (LAS)
F94158, F91357
04h 37min
Return
11/17/25
direct
F92677
01h 32min
Frontier Airlines ?
$124
Best option
San Francisco
Ontario
Outbound
10/18/25
direct
UA1697
01h 28min
Return
11/17/25
direct
UA0277
01h 41min
United Airlines ?
$191
San Francisco
Ontario
Outbound
10/18/25
1 Stopover (LAS)
F94158, F92231
12h 42min
Return
11/17/25
direct
F92677
01h 32min
Frontier Airlines
$136
San Francisco
Ontario
Outbound
10/18/25
1 Stopover (LAS)
F94158, F91357
04h 37min
Return
11/17/25
direct
F92677
01h 32min
Frontier Airlines
$139
San Francisco
Ontario
Outbound
10/18/25
1 Stopover (LAS)
F94158, F92231
12h 42min
Return
11/17/25
direct
F92677
01h 32min
Frontier Airlines
$140
San Francisco
Ontario
Outbound
10/18/25
direct
UA1697
01h 28min
Return
11/17/25
direct
UA0277
01h 41min
United Airlines ?
$200
San Francisco
Ontario
Outbound
10/18/25
1 Stopover (PHX)
AA2423, AA1666
05h 07min
Return
11/17/25
1 Stopover (PHX)
AA1423, AA2846
05h 12min
American Airlines ?
$354
San Francisco
Ontario
Outbound
10/18/25
1 Stopover (PHX)
AA2860, AA1238
05h 16min
Return
11/17/25
1 Stopover (SEA)
HA6372, HA6885
07h 38min
American Airlines ?
$396
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from San Francisco to Ontario

Favorite airline: Frontier Airlines
99 % of travelers choose to book flights on this route with Frontier Airlines and United Airlines.
Frontier Airlines
83 %
United Airlines
16 %
Cheapest weekday: Tuesday
The cheapest ticket prices are available for flights departing on Tuesday.
Direct flights are cheaper
Compared to flights with a stopover, direct flights are $341.00 cheaper on this route.
non stop flight
1 stop
01h 23min
05h 55min
54 US$
395 US$
The favorite connection is non-stop
Direct flights are especially popular on this route. 99 % of travelers will book a direct flight.
Route
bookings
Direct flights
01h 23min, from 54 US$
99 %
1 stopover Phoenix - Sky Harbor International Airport
05h 55min, from 395 US$
1 %

Important flight information

Flight information: San Francisco - Ontario

Roundtrip from 123,74 US$
Flight duration min. 01:27 / max. 03:20
Return flight duration min. 01:28/ max. 01:35
Distance 585 km
Flights per week 48
Departure airport Airport San Francisco International Airport, CA (SFO)
Arrival airport Airport Ontario-CA (ONT)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Ontario
Flight destinations with a similar price
Flight destinations with a similar price