Cheap flights from Boston to London from $409

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 $759.

Our data shows that Friday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as $1,087. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Boston to London for around $1,097.

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 $1,007 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 $917 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.

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 147 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 8% of their flights experiencing any sort of delay.

As of September 2026, there are 32 flights per day flying from Boston to London. The most common time of day flights depart is 21:00, with 85% of flights taking off in the evening.

225 flights are operational weekly from Boston to London as of September 2026. The most popular departure day for this route is Tue, with 18% of flights per week taking off on this day.