Cheap flights from Boston to London from $420

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 $805.

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 $1,101 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 $1,024 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 October 2026, prices for Boston to London flights are approximately 2% 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 150 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.

Monday 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 8% of their flights experiencing any sort of delay.

As of October 2026, there are 16 flights per day flying from Boston to London. The most common time of day flights depart is 20:00, with 90% of flights taking off in the evening.

116 flights are operational weekly from Boston to London as of October 2026. The most popular departure day for this route is Thu, with 28% of flights per week taking off on this day.