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San Francisco ✈ Ontario

Cheapest airfares from San Francisco to Ontario

Search for flight deals to Ontario

*All prices in AUD, prices may fluctuate slightly from the advertised price.
Fly on Thu, Jan 1st 2026
From $160

United Airlines
UA 2142 (Direct)
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Fly on Sat, Jan 3rd 2026
From $180

Frontier Airlines
F9 2678 (Direct)
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Fly on Sun, Nov 23rd 2025
From $271

United Airlines
UA 765 (Direct)
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