Cheap flights from London to Boston from €399

The month of September is, on average, the cheapest month to fly to Boston from London, with most prices found around €457. The month of November is another great option to travel to Boston, with average flight prices from London averaging around €459.

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 €554 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 €488 on momondo.

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

As of May 2026, prices for London to Boston flights are approximately 32% more expensive when compared to flights at the same time last year.

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 144 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 5% of their flights experiencing any sort of delay.

The number of flights available between London and Boston is 34 per day as of May 2026. The most frequent departure time is 20:00, with 41% of daily flights leaving at midday.

The number of flights available between London and Boston is 240 per week as of May 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.