Cheapest return flights from Ontario to San Francisco in June from $94

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

Return flights

27 Jun - 07 Jul Frontier Airlines direct
27 Jun - 30 Jun Frontier Airlines direct
20 Jun - 30 Jun Frontier Airlines direct
16 Jun - 14 Jul Frontier Airlines direct
29 Jun - 30 Jun Frontier Airlines direct
27 Jun - 06 Jul Frontier Airlines direct
16 Jun - 23 Jun Frontier Airlines direct
29 Jun - 08 Jul United direct
16 Jun - 20 Jun Frontier Airlines direct
27 Jun - 01 Jul United direct
18 Jun - 20 Jun United direct
21 Jun - 01 Jul United direct
23 Jun - 29 Jun Frontier Airlines direct
25 Jun - 28 Jun United direct
17 Jun - 24 Jun United direct
26 Jun - 30 Jun United direct
27 Jun - 03 Jul Frontier Airlines
29 Jun - 09 Jul Frontier Airlines
15 Jun - 14 Jul Frontier Airlines
30 Jun - 02 Jul Frontier Airlines

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

Skyscanner

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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