Cheap flights from the United States to London from £208

The cheapest month to fly to London from United States is in February. Flight prices, which tend to average around £475, 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 United States averaging around £481.

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 £389. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from United States to London for around £467.

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £402. Flights in the evening are often more expensive, with an average ticket price of £433.

Fly from Miami to London Gatwick for the best United States - London flight prices

You are more likely to see cheaper flights to London from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £451 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 United States for as low as £437 on momondo.

LEVEL, United Airlines, and SWISS are the most popular carriers operating from United States to London

British Airways, Virgin Atlantic and United Airlines are the top three most popular airlines that fly to London from United States according to our data. British Airways is the first choice among our users, with 40% 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.

Historically, on average around 16% of flights between United States and London have experienced a delay on any given week. The average delay length over the past 12 months has been 160 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

217 flights are operational daily from United States to London as of May 2026. The most popular departure time for this route is 19:00, with 72% of flights per day taking off in the evening.

1,520 flights are operational weekly from United States to London as of May 2026. The most popular departure day for this route is Sat, with 15% of flights per week taking off on this day.