Search for cheap flights and last-minute deals with Netflights. We've scanned all the flights from London Heathrow to Boston, across the 19 airlines that offer this route. We've found that 15 / Sep / 2025 is the cheapest date to travel at the moment, but it's best to go through the results to see which flight suits you.
There are 5,386 flights from London Heathrow to or via Boston every week. Out of the 19 available airlines, the most popular ones are Virgin Atlantic, Finnair & British Airways. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
Your flight from London Heathrow to Boston will take at least 7 hrs 15 mins. On average, it takes 9 hrs 30 mins to fly the 5243 km distance. Take a look at flight times to see which one works best for you.
If you want to travel in August, it's best to book your flights early, as this is peak season in Boston. The cheapest month to fly is normally January – try searching three to four months prior to then to get a bargain. You can also search by month, which will reveal the cheapest time of the week to fly.
