Cheap flights from North America to London from £143

In general, October is the cheapest month to fly from North America to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £401. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from North America averaging around £404.

On average, the least expensive day to fly to London Heathrow Airport from North America is on a Monday. momondo users have found tickets for Monday departures for as low as £408. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £466.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from North America to London Heathrow Airport in the morning for as low as £418. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £461 on average. Flights to London Heathrow Airport from North America in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Boston Logan Intl to London Heathrow for the best North America - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from North America when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £450 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from North America for as low as £433 on momondo.

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

JetBlue, Delta, and United Airlines are the most popular carriers operating from North America to London Heathrow

Virgin Atlantic, British Airways and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from North America according to our data. Virgin Atlantic is the first choice among our users, with 49% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 14 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

As of March 2026, 290 flights take off from North America and land in London Heathrow Airport each day. The most common flight departure time for this route is 17:00, with 68% of daily flights taking off in the evening.

2,034 flights are operational weekly from North America to London Heathrow Airport as of March 2026. The most popular departure day for this route is Wed, with 18% of flights per week taking off on this day.