San Francisco to Ontario
SFOONT
Fly from San Francisco to Ontario starting at USD 53 with Frontier Airlines.
Best fare available on May 24, 2026.
Limited seats. Better plans. Book before it's gone.
San Francisco to Ontario cheapest flights this week
San Francisco to Ontario monthly flight fare trend
May
from USD 28
Jun
from USD 67
Jul
No flights
Aug
No flights
Sep
No flights
Oct
No flights
Airport Details
Origin
San Francisco
San Francisco International Airport (SFO)
San Francisco, SFO
Zone
Los Angeles
Elev
13 ft
Destination
Ontario
Ontario International Airport (ONT)
Ontario, ONT
Zone
Los Angeles
Elev
944 ft
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