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	Baggage	Price
Best option San Francisco Ontario	Outbound 09/30/25 direct UA0448 01h 22min	Return 10/25/25 direct UA0393 01h 19min	United Airlines	?	$93
San Francisco Ontario	Outbound 09/30/25 direct UA1697 01h 28min	Return 10/25/25 direct UA0393 01h 19min	United Airlines	?	$134
San Francisco Ontario	Outbound 09/30/25 direct UA0448 01h 22min	Return 10/25/25 direct UA1585 01h 19min	United Airlines	?	$137
San Francisco Ontario	Outbound 09/30/25 1 Stopover (LAS) F94158, F92231 13h 56min	Return 10/25/25 1 Stopover (DEN) F91500, F91093 15h 25min	Frontier Airlines		$143
San Francisco Ontario	Outbound 09/30/25 direct UA1697 01h 28min	Return 10/25/25 direct UA1585 01h 19min	United Airlines		$144
San Francisco Ontario	Outbound 09/30/25 1 Stopover (PHX) AA2423, AA4890 03h 50min	Return 10/25/25 1 Stopover (PHX) AA2859, AA0857 03h 55min	American Airlines	?	$315

Tips and tricks to help you find cheap flights from San Francisco to Ontario

Important flight information

Flight information: San Francisco - Ontario

Roundtrip from	92,41 $
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

Flight San Francisco - Honolulu from 870 $
Flight San Francisco - Los Angeles from 106 $
Flight San Francisco - New York from 139 $
Flight San Francisco - Seattle-Tacoma from 518 $
Flight San Francisco - Miami from 560 $
Flight San Francisco - Kona from 366 $
Flight San Francisco - San Diego from 117 $
Flight San Francisco - New York from 139 $
Flight San Francisco - Newark from 182 $
Flight San Francisco - Atlanta from 164 $

Alternative flights to Ontario

Flight destinations with a similar price

Flight Ontario - Frankfurt from 710 $
Flight Ontario - Nuremberg from 881 $