Fare Guide
Estimated lowest fares found within 7 days
Cheapest Airline
The cheapest airline(s) flying from Ontario to San Francisco is Frontier Airlines.
Cheapest Month
December
Travel Period: December 2024 - November 2025
The cheapest month(s) to fly from Ontario to San Francisco is December.
Cheapest Day of the Week
Sunday
The cheapest day(s) of the week to fly from Ontario to San Francisco is Sunday.
What’s the most popular airline flying from Ontario to San Francisco?
The most popular airline flying from Ontario to San Francisco is Frontier Airlines. Find the latest flight deals on Wego.
How far is San Francisco from Ontario?
The flight distance between Ontario and San Francisco is 595km. Check all available flights on Wego.
