How long is the flight from London to Boston?

Direct flights from London to Boston typically take around 6h 39m. The great-circle distance is approximately 5,240 km.

What is the cheapest day to fly from London to Boston?

As a general industry pattern, mid-week flights (Tuesday and Wednesday) tend to be cheaper — see the cheapest-day page for real fare data on this route where available.

Which airlines fly from London to Boston?

Use our flight search above to see live availability and compare prices across airlines flying London to Boston.

How far in advance should I book a flight from London to Boston?

For the best fares, aim to book 4–8 weeks ahead during peak season and 2–4 weeks during off-peak periods. Last-minute deals can sometimes appear within 14 days of departure.

Search London → Boston

Compare flights, hotels, cars, and activities for this trip in one place.

Direct flights onlyMy dates are flexible (±3 days)Don't know where yet? Explore everywhere

500+airlines & travel sites compared

1,200+routes tracked

€0booking fees from us

Direct Flights: London to Boston

6h 39m

Flight time

5,240 km

Distance

Airport pairs

Find non-stop flights from London to Boston — no layovers, no connections. The route covers 5,240 km with a typical flight time of 6h 39m. Boston is located in United States.

Direct airport connections

LHR

London Heathrow Airport

→

BOS