Cheap flights from London to Boston
from 377 US$
From 564 USD — compare hundreds of airlines
The cheapest month is usually 2026-09 · 377 US$
See prices for my dates →Live fares from 100+ sites — free, with no hidden fees.
About this route
Compare flights from London to Boston, a about 5,277 km route (around 7h 6m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as American Airlines, British Airways, Cyprus Airways operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly London to Boston?
It's usually 2026-09, from 377 USD. Use the price calendar to compare other dates.
How long is the flight from London to Boston?
A nonstop flight takes about 7h 6m and covers around 5,277 km. Connecting itineraries take longer.
Are there direct flights from London to Boston?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from London to Boston?
American Airlines, British Airways, Cyprus Airways, Delta operate this route, among others. Compare them all in the results.
When should I book London–Boston flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
Compare your dates in seconds
London → Boston · Live fares from 100+ sites — free, with no hidden fees.