Cheap Flights from San Francisco to Ontario
We've found these cheap flights for you. You can book one-way or return flight tickets.
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Flights from San Francisco to Ontario
Flight deals from San Francisco to Ontario
We've found these cheap flights for you. You can book one-way or return flight tickets.
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Round-trip
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One way
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Cheapest nonstop
SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Thu, May 8 | Frontier Airlines
SIN 08:241h 38mNonstopSFO 10:02Ontario - San Francisco | Mon, May 12 | Frontier AirlinesNZD 64 NZD 12448% OFF48% OFFNZD 124 NZD 64 -
SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Sat, May 10 | Frontier Airlines
SIN 18:481h 39mNonstopSFO 20:27Ontario - San Francisco | Tue, May 13 | Frontier AirlinesNZD 68 NZD 12445% OFF45% OFFNZD 124 NZD 68
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Mon, May 5 | Frontier Airlines
SIN 08:241h 38mNonstopSFO 10:02Ontario - San Francisco | Mon, May 12 | Frontier AirlinesNZD 69 NZD 12444% OFF44% OFFNZD 124 NZD 69
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SFO 08:351h 28mNonstopONT 10:03San Francisco - Ontario | Mon, Apr 28 | Frontier Airlines
SIN 18:481h 42mNonstopSFO 20:30Ontario - San Francisco | Tue, Apr 29 | Frontier AirlinesNZD 7440% OFFNZD 124 NZD 74
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Thu, May 1 | Frontier Airlines
SIN 08:241h 38mNonstopSFO 10:02Ontario - San Francisco | Sat, May 3 | Frontier AirlinesNZD 7638% OFFNZD 124 NZD 76
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Fri, May 2 | Frontier Airlines
SIN 18:481h 39mNonstopSFO 20:27Ontario - San Francisco | Tue, May 6 | Frontier AirlinesNZD 8333% OFFNZD 124 NZD 83
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Mon, May 12 | Frontier Airlines
SIN 08:241h 38mNonstopSFO 10:02Ontario - San Francisco | Sun, May 18 | Frontier AirlinesNZD 8432% OFFNZD 124 NZD 84
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SFO 08:351h 28mNonstopONT 10:03San Francisco - Ontario | Thu, Apr 24 | Frontier Airlines
SIN 18:551h 42mNonstopSFO 20:37Ontario - San Francisco | Wed, Apr 30 | Frontier AirlinesNZD 8631% OFFNZD 124 NZD 86
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SFO 10:481h 27mNonstopONT 12:15San Francisco - Ontario | Sat, May 3 | Frontier Airlines
SIN 08:241h 38mNonstopSFO 10:02Ontario - San Francisco | Sat, May 10 | Frontier AirlinesNZD 8730% OFFNZD 124 NZD 87
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SFO 22:111h 25mNonstopONT 23:36San Francisco - Ontario | Thu, May 22 | Frontier Airlines
SIN 21:411h 30mNonstopSFO 23:11Ontario - San Francisco | Thu, May 29 | Frontier AirlinesNZD 8828% OFFNZD 124 NZD 88
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SFO 13:0017h 25m1 stopsONT Invalid DateSan Francisco - Ontario | Wed, Apr 16 | Normal Airline
ONT 15:006hNonstopSFO 16:00Ontario - San Francisco | Fri, Apr 18 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Sat, May 10 | Frontier AirlinesNZD 23 NZD 5559% OFF59% OFFNZD 55 NZD 23
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Sun, May 11 | Frontier AirlinesNZD 33 NZD 5540% OFF40% OFFNZD 55 NZD 33
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Sat, May 3 | Frontier AirlinesNZD 34 NZD 5538% OFF38% OFFNZD 55 NZD 34
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SFO 08:351h 28mNonstopONT 10:03San Francisco - Ontario | Thu, Apr 24 | Frontier AirlinesNZD 3635% OFFNZD 55 NZD 36
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SFO 22:111h 25mNonstopONT 23:36San Francisco - Ontario | Sun, May 25 | Frontier AirlinesNZD 3634% OFFNZD 55 NZD 36
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Mon, May 5 | Frontier AirlinesNZD 3733% OFFNZD 55 NZD 37
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SFO 22:111h 25mNonstopONT 23:36San Francisco - Ontario | Sat, May 24 | Frontier AirlinesNZD 3733% OFFNZD 55 NZD 37
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Fri, May 2 | Frontier AirlinesNZD 3732% OFFNZD 55 NZD 37
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SFO 08:341h 28mNonstopONT 10:02San Francisco - Ontario | Thu, May 1 | Frontier AirlinesNZD 3928% OFFNZD 55 NZD 39
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SFO 22:111h 25mNonstopONT 23:36San Francisco - Ontario | Fri, May 30 | Frontier AirlinesNZD 3928% OFFNZD 55 NZD 39
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SFO 13:0017h 25m1 stopsONT Invalid DateSan Francisco - Ontario | Wed, Apr 16 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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FAQ
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When are flight tickets from San Francisco (SFO) to Ontario (ONT) the cheapest?
Airlines adjust prices for flights from San Francisco to Ontario based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much do flights from San Francisco (SFO) to Ontario (ONT) cost?
According to Trip.com's data, the lowest price is around NZD 234.
How to find a cheap flight from San Francisco to Ontario
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from San Francisco to Ontario. Book your flights at the right time and save more.
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Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
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Flying during the week, early in the morning, or late at night can help save money.
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Flight Information from San Francisco to Ontario
| Cheapest one-way flight price | NZD 22 |
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| Cheapest round-trip ticket price | NZD 63 |
| Off-season for travel | February |
| Peak season for travel | February |
| Flight distance | 12,799.42 km |
| Popular airline | United Airlines |