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 22:111h 28mDirectONT 23:39San Francisco - Ontario | Sun, Jun 1 | Frontier Airlines
SIN 21:411h 34mDirectSFO 23:15Ontario - San Francisco | Mon, Jun 2 | Frontier AirlinesNZD 96 NZD 35073% OFF73% OFFNZD 350 NZD 96 -
SFO 22:111h 25mDirectONT 23:36San Francisco - Ontario | Sat, May 24 | Frontier Airlines
SIN 21:411h 30mDirectSFO 23:11Ontario - San Francisco | Sun, May 25 | Frontier AirlinesNZD 97 NZD 35072% OFF72% OFFNZD 350 NZD 97
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SFO 22:111h 28mDirectONT 23:39San Francisco - Ontario | Fri, Jun 6 | Frontier Airlines
SIN 21:411h 34mDirectSFO 23:15Ontario - San Francisco | Sun, Jun 8 | Frontier AirlinesNZD 117 NZD 35066% OFF66% OFFNZD 350 NZD 117
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SFO 22:111h 25mDirectONT 23:36San Francisco - Ontario | Thu, May 22 | Frontier Airlines
SIN 21:411h 30mDirectSFO 23:11Ontario - San Francisco | Thu, May 29 | Frontier AirlinesNZD 12465% OFFNZD 350 NZD 124
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SFO 22:111h 28mDirectONT 23:39San Francisco - Ontario | Mon, Jun 2 | Frontier Airlines
SIN 21:411h 34mDirectSFO 23:15Ontario - San Francisco | Mon, Jun 9 | Frontier AirlinesNZD 12465% OFFNZD 350 NZD 124
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Thu, May 8 | Frontier Airlines
SIN 08:241h 38mDirectSFO 10:02Ontario - San Francisco | Mon, May 12 | Frontier AirlinesNZD 14260% OFFNZD 350 NZD 142
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Fri, May 9 | Frontier Airlines
SIN 08:241h 38mDirectSFO 10:02Ontario - San Francisco | Sat, May 10 | Frontier AirlinesNZD 15256% OFFNZD 350 NZD 152
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Mon, May 12 | Frontier Airlines
SIN 08:241h 38mDirectSFO 10:02Ontario - San Francisco | Sun, May 18 | Frontier AirlinesNZD 16752% OFFNZD 350 NZD 167
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Mon, May 5 | Frontier Airlines
SIN 08:241h 38mDirectSFO 10:02Ontario - San Francisco | Mon, May 12 | Frontier AirlinesNZD 21339% OFFNZD 350 NZD 213
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Sat, May 10 | Frontier Airlines
SIN 18:481h 39mDirectSFO 20:27Ontario - San Francisco | Tue, May 13 | Frontier AirlinesNZD 24530% OFFNZD 350 NZD 245
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SFO 13:0017h 25m1 stopsONT Invalid DateSan Francisco - Ontario | Wed, May 7 | Normal Airline
ONT 15:006hDirectSFO 16:00Ontario - San Francisco | Fri, May 9 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
SFO 22:111h 28mDirectONT 23:39San Francisco - Ontario | Sun, Jun 1 | Frontier AirlinesNZD 58 NZD 32282% OFF82% OFFNZD 322 NZD 58
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Mon, May 19 | Frontier AirlinesNZD 58 NZD 32282% OFF82% OFFNZD 322 NZD 58
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SFO 22:111h 28mDirectONT 23:39San Francisco - Ontario | Mon, Jun 2 | Frontier AirlinesNZD 58 NZD 32282% OFF82% OFFNZD 322 NZD 58
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SFO 22:111h 28mDirectONT 23:39San Francisco - Ontario | Mon, Jun 9 | Frontier AirlinesNZD 6081% OFFNZD 322 NZD 60
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SFO 22:111h 25mDirectONT 23:36San Francisco - Ontario | Sat, May 24 | Frontier AirlinesNZD 6580% OFFNZD 322 NZD 65
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SFO 10:481h 27mDirectONT 12:15San Francisco - Ontario | Sat, May 10 | Frontier AirlinesNZD 6679% OFFNZD 322 NZD 66
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Thu, May 8 | Frontier AirlinesNZD 6679% OFFNZD 322 NZD 66
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Thu, May 15 | Frontier AirlinesNZD 13657% OFFNZD 322 NZD 136
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Fri, May 16 | Frontier AirlinesNZD 15253% OFFNZD 322 NZD 152
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SFO 08:341h 28mDirectONT 10:02San Francisco - Ontario | Fri, May 9 | Frontier AirlinesNZD 22630% OFFNZD 322 NZD 226
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SFO 13:0017h 25m1 stopsONT Invalid DateSan Francisco - Ontario | Wed, May 7 | 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 229.
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 50 |
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| Cheapest round-trip ticket price | NZD 95 |
| Off-season for travel | February |
| Peak season for travel | February |
| Flight distance | 12,799.42 km |
| Popular airline | United Airlines |