Cheap flights from London Heathrow Airport to Boston from $473

In general, September is the cheapest month to fly from London Heathrow Airport to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $544. If you aren’t able to travel during the month of September, then book flights to Boston from London Heathrow Airport during October instead. Flights to Boston in October, while not as cheap as those in September, still average around $557.

The cheapest day to depart from London Heathrow Airport to Boston is on a Wednesday when prices can be found for as low as $680. 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 Boston on Saturday is $781.

According to our data, the cheapest time of day to fly to Boston is at noon. momondo users have found flights departing from London Heathrow Airport to Boston at noon for as low as $707. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Boston, so prices are often more expensive at around $898 per ticket.

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

You are more likely to see cheaper flights to Boston from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $652 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from London Heathrow Airport for as low as $575 on momondo.

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

British Airways, United Airlines, and SWISS are the most popular carriers operating from London Heathrow to Boston Logan Intl

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to Boston from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Boston. Keep in mind that there are 10 different airlines that fly to Boston on a routine basis, so you have a few additional options to choose from.

Historically, on average around 9% of flights between London and Boston have experienced a delay on any given week. The average delay length over the past 12 months has been 148 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 5% of their flights experiencing any sort of delay.

Lisbon (LIS) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Lisbon (LIS) offer the lowest average round-trip price of $593.

Flights connecting via Lisbon (LIS) have the shortest average one-way travel time: 12h 45m.

Lisbon (LIS) has the shortest average layover time for this route: 5h 50m.

32 flights are operational daily from London Heathrow Airport to Boston as of May 2026. The most popular departure time for this route is 8:00PM, with 36% of flights per day taking off at noon.

As of May 2026, there are 229 flights per week flying from London Heathrow Airport to Boston. The most common day of the week flights depart is Mon, with 16% of flights taking off on this day.