Compare cheap flights from Boston to London. Search BOS to LHR fares, airports, airlines and flexible dates.
About this route
Boston is one of the shortest US gateways to London, which makes overnight flights short. Several airlines compete, and JetBlue's service has added pressure on fares.
Boston airport departure area before a flight to London.
Route at a glance
Route
Boston to London
Airports
BOS → LHR
Compare
Compare dates, bag rules, and airport transfers before you judge the fare.
Route verdict
Boston to London is a practical route for flexible travelers who can compare exact dates against a nearby travel window. Use the first Boston to London search as a benchmark, then test nearby dates before judging the route as expensive. Airport changes should stay secondary unless the transfer still supports the trip you want. Once the fare looks fair, use the London destination guide to confirm the arrival plan.
Route rhythm
Boston (BOS) to London (LHR) is about 3,260 miles (5,250 km). Nonstop flights take about 6.5 hours eastbound and 7.5 hours back, depending on winds and routing.
Timing
January to March and November are usually cheapest. Summer and the holidays are peak season.
Airlines
These carriers have commonly served the route. Schedules change by season, so confirm current options in the live results.
London, the destination for this route.
Fare range
The overnight eastbound flight is short, so a daytime departure can be worth it for sleep. Basic economy fares may exclude checked bags and seat choice.
Airport choice
On the Boston side:
On the London side:
Destination fit
London is easy to combine with Edinburgh or Paris by train.
Keep exploring
Better-value fares
Use the search form above to compare live fares, airlines and dates for Boston to London.
Start with BOS and LHR, then widen the search only when the ground transfer still makes sense.
On Boston to London, baggage, seats, and airport transfers can erase the savings from a low headline fare.
Even a one or two day shift can move you into a cheaper pricing band on busy city-break routes.
Nonstop flights often win on convenience, but a short connection is still worth checking before you rule it out.
About 6.5 hours eastbound and 7.5 hours westbound.