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 07/25/25 direct F92678 01h 29min	Return 08/17/25 direct F92677 01h 33min	Frontier Airlines		$117
San Francisco Ontario	Outbound 07/25/25 direct F92678 01h 29min	Return 08/17/25 direct F92677 01h 33min	Frontier Airlines		$123
San Francisco Ontario	Outbound 07/25/25 direct F92678 01h 29min	Return 08/17/25 direct F92677 01h 33min	Frontier Airlines		$125
San Francisco Ontario	Outbound 07/25/25 direct F92678 01h 29min	Return 08/17/25 direct F92677 01h 33min	Frontier Airlines		$129
San Francisco Ontario	Outbound 07/25/25 direct F92678 01h 29min	Return 08/17/25 direct F92677 01h 33min	Frontier Airlines		$130
San Francisco Ontario	Outbound 09/19/25 direct UA1697 01h 28min	Return 09/29/25 direct UA0393 01h 19min	United Airlines	?	$219
San Francisco Ontario	Outbound 07/25/25 direct UA0368 01h 27min	Return 08/17/25 direct UA2332 01h 27min	United Airlines	?	$233
San Francisco Ontario	Outbound 07/25/25 direct UA1697 01h 29min	Return 08/17/25 direct UA2042 01h 27min	United Airlines	?	$248
San Francisco Ontario	Outbound 09/19/25 1 Stopover (PHX) AA2423, AA1666 05h 01min	Return 09/29/25 1 Stopover (PHX) AA1666, AA2423 16h 08min	American Airlines	?	$395
San Francisco Ontario	Outbound 07/25/25 1 Stopover (PHX) AA1914, AA3203 17h 10min	Return 08/17/25 1 Stopover (PHX) AA1666, AA6430 13h 26min	American Airlines	?	$458

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

Important flight information

Flight information: San Francisco - Ontario

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 - Houston - George Bush from $568

Alternative flights to Ontario

Flight Dallas - Ontario from $97
Flight Baltimore - Ontario from $302