Flight Routes from San Francisco to Ontario

Trip type

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
06/25/26
direct
UA0552
01h 37min
Return
06/30/26
1 Stopover (PHX)
AA1194, AA3199
06h 48min
United Airlines ?
$416
Best option
San Francisco
Ontario
Outbound
06/25/26
direct
UA0552
01h 37min
Return
06/30/26
direct
UA5433
01h 30min
United Airlines ?
$599
San Francisco
Ontario
Outbound
06/25/26
1 Stopover (PHX)
AA1321, AA1238
06h 03min
Return
06/30/26
1 Stopover (PHX)
AA1194, AA3199
06h 48min
American Airlines
$543
San Francisco
Ontario
Outbound
06/25/26
1 Stopover (DEN)
F91230, F91261
17h 49min
Return
06/30/26
2 Stopovers (DEN, LAS)
UA2446, UA0526, F93801
13h 25min
Frontier Airlines ?
$551
San Francisco
Ontario
Outbound
06/25/26
1 Stopover (PHX)
AA2548, AA0864
06h 04min
Return
06/30/26
1 Stopover (PHX)
AA1194, AA3199
06h 48min
American Airlines ?
$667
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
$395
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
99 %
1 stopover Phoenix - Sky Harbor International Airport
05h 55min, from $395
1 %

Important flight information

Flight information: San Francisco - Ontario

Roundtrip from $415.70
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