Find cheap flights from Ontario to San Francisco starting at $15.
Book one-way or return flights from Ontario to San Francisco from as little as $15. Choose from the popular airlines below and book your flight today!
- One way
- Round-trip
- ONT17:591h 28mDirectSFO19:27Sat, May 11|Ontario - San Francisco|Frontier Airlines$15$2845% OFF45% OFF$28$15
- ONT07:361h 26mDirectSFO09:02Wed, Jun 12|Ontario - San Francisco|Frontier Airlines$16$2844% OFF44% OFF$28$16
- ONT07:391h 28mDirectSFO09:07Sat, May 18|Ontario - San Francisco|Frontier Airlines$16$2843% OFF43% OFF$28$16
- ONT07:391h 28mDirectSFO09:07Wed, May 22|Ontario - San Francisco|Frontier Airlines$16$16
- ONT07:531h 27mDirectSFO09:20Tue, May 7|Ontario - San Francisco|Frontier Airlines$18$18
- ONT07:581h 27mDirectSFO09:25Wed, May 15|Ontario - San Francisco|Frontier Airlines$18$18
- ONT07:531h 27mDirectSFO09:20Tue, May 14|Ontario - San Francisco|Frontier Airlines$18$18
- ONT07:581h 27mDirectSFO09:25Wed, May 8|Ontario - San Francisco|Frontier Airlines$19$19
- ONT07:531h 27mDirectSFO09:20Tue, Apr 30|Ontario - San Francisco|Frontier Airlines$19$19
- ONT07:391h 28mDirectSFO09:07Tue, May 21|Ontario - San Francisco|Frontier Airlines$19$19
- ONT13:003h 5mDirectSFO14:00Sun, May 5|Ontario - San Francisco|Frontier AirlinesFind More FlightsFind More Flights
Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Ontario to San Francisco.
- CheapestONT17:591h 28mDirectSFO19:27Ontario International Airport - San Francisco International AirportSat, May 11Frontier Airlines$15
- ONT17:591h 28mDirectSFO19:27Ontario International Airport - San Francisco International AirportSat, May 11Frontier Airlines$15Find More Flights
Frequently Asked Questions
How to find a cheap flight from Ontario to San Francisco
Cheapest nonstop flight price | $15 |
---|---|
Cheapest round-trip ticket price | $33 |
Off-season for travel | February |
Peak season for travel | February |
Flight distance | 12,799.42km |
Popular airline | Frontier Airlines |
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