Cheap flights from London to Boston from €348

The month of September is, on average, the cheapest month to fly to Boston from London, with most prices found around €452. The month of February is another great option to travel to Boston, with average flight prices from London averaging around €466.

The cheapest day to depart from London to Boston is on a Saturday when prices can be found for as low as €711. Flights from London to Boston on a Monday will generally be more expensive and average around €1,166. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Flying to Boston from London in the morning is the least expensive time of day to depart. momondo users have found prices as low as €595 when looking at flights departing in the morning. Flights in the evening are often more expensive, with an average ticket price of €1,063.

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

You are more likely to see cheaper flights to Boston from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Boston for around €543 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from London for as low as €490 on momondo.

There are 2 cabin classes available to choose from on London to Boston Logan Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 19% on your flight if you consider stops on a London to Boston flight.

As of March 2026, prices for London to Boston flights are approximately 54% more expensive when compared to flights at the same time last year.

Historically, on average around 8% 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 154 minutes.

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

Saturday 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 4% of their flights experiencing any sort of delay.

The number of flights available between London and Boston is 28 per day as of March 2026. The most frequent departure time is 13:00, with 43% of daily flights leaving in the afternoon.

The number of flights available between London and Boston is 198 per week as of March 2026. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.