Cheap flights from Boston to London from $399

If you aren’t able to travel during the month of January, then book flights to London from Boston during February instead. Flights to London in February, while not as cheap as those in January, still average around $765.

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

You are more likely to see cheaper flights to London from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $1,036 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Boston for as low as $920 on momondo.

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

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

As of September 2026, prices for Boston to London flights are approximately 12% cheaper when compared to flights at the same time last year.

Historically, on average around 12% 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.

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, American Airlines have had the fewest delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

As of September 2026, there are 34 flights per day flying from Boston to London. The most common time of day flights depart is 19:00, with 86% of flights taking off in the evening.

238 flights are operational weekly from Boston to London as of September 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.