$384 Find Cheap United Airlines Flights from San Francisco to London

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

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

  Generally, when trying to get a below average price for your ticket, try to book around 2 days before departure. For the cheapest possible price, our data suggests booking 77 days before departure.

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

  With an average price of $925 return, United Airlines is not the cheapest airline to fly from San Francisco to London with. Instead, for the lowest price, our data suggests flying with TAP AIR PORTUGAL, where a return flight costs $551 on average.

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

  In the last 3 days, the lowest price for a flight with United Airlines from San Francisco to London was $606 for a return flight and $366 for a one-way flight.

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

  Yes, United Airlines does offer direct flights for the route, with around 21 flights per week.

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

  On average, the cheapest day of the week to fly from San Francisco to London with United Airlines is Sunday, when prices are around $383. The most expensive day is generally Thursday, where the average price is around $433.

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

  The cheapest month for United Airlines flights to London from San Francisco is generally October, where plane tickets cost $423 on average. If possible, try to avoid the most expensive months of December and June, where tickets cost $549 and $746 respectively.