Boston to London flights
Round trip · Economy · Prices per person in USD
Prices updated
Prices are low right now
$500 is $70 (12%) below the usual $570 for Boston → London.
Buy now or wait? We're still learning this route. We have 1 day of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when Boston → London drops below your price.Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| September 2026 | No fares found yet |
| October 2026 | $570 |
| November 2026 | $500 (cheapest month) |
| December 2026 | $531 |
| January 2027 | $582 |
| February 2027 | $647 |
Cheapest dates in the next 4 months
Round trip, per person-
Nov 10 – 17 7 nights · leave Tue$500 −12% vs usual$500 −12% vs usual Book
Air Canada Express 2 stops · 11h 05m -
Dec 23 – 30 7 nights · leave Wed$531 −7% vs usual$531 −7% vs usual Book
Icelandair 1 stop · 8h 25m -
Dec 1 – 8 7 nights · leave Tue$538 −6% vs usual$538 −6% vs usual Book
Icelandair 1 stop · 8h 25m
-
Dec 20 – 27 7 nights · leave Sun$542 −5% vs usual$542 −5% vs usual Book
Icelandair 1 stop · 8h 30m
-
Oct 23 – Nov 1 9 nights · leave Fri$570$570 Book
Aer Lingus 1 stop · 7h 25m -
Nov 21 – 27 6 nights · leave Sat$646 +13% vs usual$646 +13% vs usual Book
Aer Lingus 1 stop · 7h 20m
-
Oct 22 – Nov 1 10 nights · leave Thu$683 +20% vs usual$683 +20% vs usual Book
TAP Air Portugal 2 stops · 10h 00m -
Oct 23 – 26 3 nights · leave Fri$684 +20% vs usual$684 +20% vs usual Book
SAS Scandinavian 2 stops · 10h 40m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in London
Tickets and tours on KlookTo see tours and tickets here, turn on partner content in .
Partner widget: we may earn a commission if you book, at no extra cost to you.
Airport transfer to London
Fixed prices from LHR on KiwitaxiTo see transfer prices here, turn on partner content in .
Partner widget: we may earn a commission if you book, at no extra cost to you.
Plan the rest of your trip
London · Nov 10 – 17Travel insurance · EKTA Airport transfer · Kiwitaxi
Partner links: we may earn a commission if you book, at no extra cost to you.
Good to know
More from Boston
-
-
-
-
-
-
-
-
Flights to London from other cities
-
-
-
-
-
-
Boston to London: questions
How much is a flight from Boston to London?
The cheapest round trip we have found right now is $500, leaving November 10 and returning November 17. The usual price on this route is about $570, so this fare is 12% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Boston to London?
November 2026, with round trips from $500. The most expensive month in our data is February (from $647). Based on the 5 months ahead we have prices for.
About this route
We track round-trip economy fares from Boston (United States) to London (United Kingdom) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $500, departing November 10 and returning November 17, about 12% below the usual $570. Right now we're following 10 upcoming date combinations on this route. The cheapest month to fly in our data is November, from $500. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.