Cheapest one-way
£ 2,021.61
TAP Air Portugal · 1 stop
One-way tickets on LHR–BOS recently started around £ 2,021.61.
Flights from London to Boston
Recent BookingTrolley searches found London to Boston fares from £ 4,043.22 — compare live LHR–BOS prices, airlines and durations below.
London to Boston flights overview
LHR and BOS sit roughly 5,240 km apart, so total travel time depends on whether you fly nonstop or connect. BookingTrolley found 13 airlines currently compete on the LHR–BOS corridor, with TAP Air Portugal posting one of the lowest fares at £ 4,043.22. 8 of them offer nonstop options, which save layover time but can cost more than connecting itineraries.
The lowest fare BookingTrolley recently tracked from London to Boston was £ 4,043.22. Across the months we have sampled, the typical round-trip fare averages about £ 4,850.60. Nov tends to be the cheapest month to fly (around £ 4,043.22), while Jun is usually the most expensive at about £ 6,017.43 — a swing of roughly 49%.
Frequently asked questions about flying from London to Boston
Tuesday and Wednesday are typically the cheapest days to fly from London to Boston. According to BookingTrolley fare data on the London to Boston route (LHR–BOS), round-trip tickets started at £ 4,043.22. United Kingdom travellers often save by shifting 3–4 days around their preferred date on BookingTrolley.
The cheapest airlines on London to Boston are TAP Air Portugal (from £ 4,043.22), Delta Air Lines (from £ 7,457.60), Virgin Atlantic (from £ 7,465.50), according to BookingTrolley's multi-provider comparison priced for the United Kingdom market currency when available.
The cheapest flights from London to Boston started at £ 4,043.22 round trip with one stop on TAP Air Portugal, per BookingTrolley data relevant to United Kingdom shoppers. Fares fluctuate with demand.
Flight time from London to Boston depends on the airline and on whether the itinerary is nonstop or connecting. BookingTrolley shows a duration only when it is calculated from observed departure and arrival times.
Shoulder season around peak holidays often pairs softer airfares with lighter crowds. According to BookingTrolley fare data on the London to Boston route (LHR–BOS), round-trip tickets started at £ 4,043.22. BookingTrolley suggests booking 4–8 weeks ahead for routes like London to Boston.
Use BookingTrolley's flexible-date comparison for London (LHR) to Boston (BOS) to see which days cost least. Avoiding Friday–Sunday peaks is one of the fastest ways for United Kingdom travellers to cut the ticket price.
Find cheap flights on popular routes
Explore fares from London, into Boston, and on related corridors with BookingTrolley.