$29 Find Cheap United Airlines Flights from Ontario to San Francisco

When to Book Flights with United Airlines from Ontario to San Francisco

• How far in advance should I book tickets for a flight with United Airlines from Ontario to San Francisco?

  Generally, when trying to get a below average price for your ticket, try to book around 5 days before departure. For the cheapest possible price, our data suggests booking 46 days before departure.

• Is United Airlines the cheapest airline to fly with from Ontario to San Francisco?

  With an average price of $204 return, United Airlines is not the cheapest airline to fly from Ontario to San Francisco with. Instead, for the lowest price, our data suggests flying with Spirit Airlines, where a return flight costs $74 on average.

• What is the cheapest United Airlines flight from Ontario to San Francisco?

  In the last 3 days, the lowest price for a flight with United Airlines from Ontario to San Francisco was $52 for a return flight and $28 for a one-way flight.

• Does United Airlines fly direct to San Francisco from Ontario?

  Yes, United Airlines does offer direct flights for the route, with around 12 flights per week.

• What’s the cheapest day of the week to fly from Ontario to San Francisco with United Airlines?

  On average, the cheapest day of the week to fly from Ontario to San Francisco with United Airlines is Monday, when prices are around $28. The most expensive day is generally Sunday, where the average price is around $58.

• What’s the cheapest month to fly from Ontario to San Francisco with United Airlines?

  The cheapest month for United Airlines flights to San Francisco from Ontario is generally January, where plane tickets cost $88 on average. If possible, try to avoid the most expensive months of September and November, where tickets cost $188 and $188 respectively.