Cheap flights from Boston to London from £198

In general, January is the cheapest month to fly from Boston to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £389. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Boston averaging around £391.

On average, the least expensive day to fly to London Heathrow Airport from Boston is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £414. 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 £531.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Boston to London Heathrow Airport in the afternoon for as low as £433. 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 morning when prices are £530 on average. Flights to London Heathrow Airport from Boston in the morning 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 Boston Logan Intl - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £468 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 Boston for as low as £451 on momondo.

No. A direct flight is the cheapest option for a flight between Boston to London Heathrow Airport.

As of April 2026, prices for Boston to London Heathrow Airport flights are approximately 5% cheaper when compared to flights at the same time last year.

United Airlines and KLM are the most popular carriers operating from Boston Logan Intl to London Heathrow

British Airways, Virgin Atlantic and Iberia are the top three most popular airlines that fly to London Heathrow Airport from Boston according to our data. British Airways is the first choice among our users, with 42% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 9 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 10% of flights between Boston and London have experienced a delay on any given week. The average delay length over the past 12 months has been 146 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.

Wednesday 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 7% of their flights experiencing any sort of delay.

As of April 2026, 30 flights take off from Boston and land in London Heathrow Airport each day. The most common flight departure time for this route is 19:00, with 100% of daily flights taking off in the evening.

As of April 2026, 213 flights take off from Boston and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.