To save on the cost of your flight from San Francisco to London Stansted Airport, book at least 48 days before your planned departure. Booking around this time can save you about 6% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $839 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $841.
February can be a great time to fly to London Stansted Airport from San Francisco with a flight ticket averaging about $786. Cheapflights users have found deals in the month of February for as cheap as $528. The most expensive prices can be found in the month of July.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Francisco to London Stansted Airport as you normally would.