Cheap flights from North America to London from £128

The cheapest month to fly to London from North America is in September. Flight prices, which tend to average around £375, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from North America averaging around £383.

Our data shows that Monday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £397. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from North America to London for around £456.

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £411. Flights in the evening are often more expensive, with an average ticket price of £436.

Fly from New York John F Kennedy Intl to London Gatwick for the best North America - London flight prices

You are more likely to see cheaper flights to London from North America when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £445 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from North America for as low as £429 on momondo.

There are 4 cabin classes available to choose from on North America to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

TAP AIR PORTUGAL, United Airlines, and British Airways are the most popular carriers operating from North America to London

Virgin Atlantic, British Airways and United Airlines are the top three most popular airlines that fly to London from North America according to our data. Virgin Atlantic is the first choice among our users, with 48% of people opting to fly with this airline when travelling to London. Keep in mind that there are 17 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

The number of flights available between North America and London is 235 per day as of February 2026. The most frequent departure time is 19:00, with 63% of daily flights leaving in the evening.

The number of flights available between North America and London is 1,648 per week as of February 2026. The most frequent departure day is Fri, with 15% of weekly flights leaving on this day.