$99 Find Cheap United Airlines Flights from Boston to San Francisco

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

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

  Generally, when trying to get a below average price for your ticket, try to book around 14 days before departure. For the cheapest possible price, our data suggests booking 86 days before departure.

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

  With an average price of $415 return, United Airlines is not the cheapest airline to fly from Boston to San Francisco with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $198 on average.

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

  In the last 3 days, the lowest price for a flight with United Airlines from Boston to San Francisco was $227 for a return flight and $118 for a one-way flight.

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

  Yes, United Airlines does offer direct flights for the route, with around 11 flights per week.

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

  On average, the cheapest day of the week to fly from Boston to San Francisco with United Airlines is Wednesday, when prices are around $114. The most expensive day is generally Saturday, where the average price is around $168.

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

  The cheapest month for United Airlines flights to San Francisco from Boston is generally September, where plane tickets cost $229 on average. If possible, try to avoid the most expensive months of July and December, where tickets cost $308 and $308 respectively.