Cheapest return flights from Ontario to San Francisco in March from $62

Best time to book flights for Ontario (ONT) to San Francisco (SFO) flights at AirHint

AirHint found the following cheapest return flights from Ontario (ONT) to San Francisco (SFO) in March 2025 (see full year).

Return flights

07 Mar - 09 Mar Frontier Airlines direct
13 Mar - 16 Mar Frontier Airlines direct
01 Mar - 02 Mar Frontier Airlines
09 Mar - 13 Mar Frontier Airlines direct
06 Mar - 06 Mar Frontier Airlines
13 Mar - 23 Mar Frontier Airlines direct
04 Mar - 10 Mar Frontier Airlines
17 Mar - 21 Mar Frontier Airlines direct
05 Mar - 09 Mar Frontier Airlines
16 Mar - 23 Mar Frontier Airlines direct
11 Mar - 10 Apr Frontier Airlines
27 Mar - 01 Apr Frontier Airlines
19 Mar - 04 Apr Frontier Airlines
29 Mar - 06 Apr United direct
30 Mar - 04 Apr Southwest Airlines

Also check the deals for one-way flights from Ontario to San Francisco in March.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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