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Cheap flights from London to Boston from $511

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Boston departing on 10/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London to Boston

Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from London to Boston.
13:05 - 18:50LHR-BOS
10h 45m1 stop
23:35 - 20:20BOS-LHR
15h 45m1 stop
$740Icelandair
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Sat, 10 May - Fri, 16 May
10:50 - 17:40LHR-BOS
11h 50m1 stop
19:14 - 10:40BOS-LHR
10h 26m1 stop
$768Lufthansa
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Tue, 6 May - Tue, 13 May
13:45 - 19:55LHR-BOS
11h 10m1 stop
19:32 - 10:40BOS-LHR
10h 08m1 stop
Wed, 23 Apr - Wed, 30 Apr
13:05 - 18:50LHR-BOS
10h 45m1 stop
20:50 - 20:20BOS-LHR
18h 30m1 stop
$776Icelandair
Find Deal
Sat, 10 May - Tue, 13 May
06:00 - 18:09LHR-BOS
17h 09m2 stops
15:20 - 06:30BOS-LHR
10h 10m1 stop
$800Air Canada
Find Deal
Sat, 10 May - Fri, 16 May
06:00 - 18:09LHR-BOS
17h 09m2 stops
21:40 - 13:00BOS-LHR
10h 20m1 stop
Sat, 10 May - Tue, 13 May
07:25 - 11:28LHR-BOS
33h 03m2 stops
15:20 - 06:30BOS-LHR
10h 10m1 stop
$806United Airlines
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Fri, 9 May - Fri, 16 May
08:40 - 19:55LHR-BOS
16h 15m1 stop
21:40 - 13:00BOS-LHR
10h 20m1 stop
$808SWISS
Find Deal
Thu, 1 May - Mon, 12 May
09:30 - 18:09LHR-BOS
13h 39m1 stop
18:45 - 10:00BOS-LHR
10h 15m1 stop
$844United Airlines
Find Deal
Mon, 5 May - Tue, 13 May
08:45 - 19:55LHR-BOS
16h 10m1 stop
17:05 - 13:00BOS-LHR
14h 55m1 stop
$1,073SWISS
Find Deal
Sun, 18 May - Sun, 8 Jun

SWISS flights from London to Boston

Our best SWISS deals on London to Boston flight tickets
SWISS
1 May
LHR08:40London Heathrow
16h 15m
1 stop
BOS19:55Boston Logan Intl
12 May
BOS21:40Boston Logan Intl
10h 20m
1 stop
LHR13:00London Heathrow
SWISS
18 May
LHR08:45London Heathrow
16h 10m
1 stop
BOS19:55Boston Logan Intl
8 June
BOS17:05Boston Logan Intl
14h 55m
1 stop
LHR13:00London Heathrow

Scandinavian Airlines flights from London to Boston

Our best Scandinavian Airlines deals on London to Boston flight tickets
Scandinavian Airlines
2 Apr
LHR21:05London Heathrow
23h 30m
2 stops
BOS15:35Boston Logan Intl
7 Apr
BOS17:40Boston Logan Intl
19h 00m
1 stop
LHR17:40London Heathrow
Scandinavian Airlines
23 May
LHR06:40London Heathrow
13h 55m
1 stop
BOS15:35Boston Logan Intl
29 May
BOS17:40Boston Logan Intl
17h 45m
2 stops
LHR16:25London Heathrow
Scandinavian Airlines
5 Sept
LHR06:40London Heathrow
13h 55m
1 stop
BOS15:35Boston Logan Intl
9 Sept
BOS17:40Boston Logan Intl
17h 45m
2 stops
LHR16:25London Heathrow

See travel insights to Boston from

How to get the cheapest flight ticket from London to Boston

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Boston?

In general, September is the cheapest month to fly from London to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $841. The month of February is another great option to travel to Boston, with average flight prices from London averaging around $846.

What is the cheapest day to depart on your flight to Boston?

On average, the least expensive day to fly to Boston from London is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $0. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,704. These prices are subject to change though, so be sure to set up a Price Alert for flights to Boston.

What is the cheapest time of day to depart on your flight to Boston?

According to our data, the cheapest time of day to fly to Boston is in the evening. momondo users have found flights departing from London to Boston in the evening for as low as $0. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. At midday is when there is more demand to fly to Boston, so prices are often more expensive at around $1,431 per ticket.

What is the cheapest London to Boston Logan Intl flight route?

Fly from London Heathrow to Boston Logan Intl for the best London - Boston Logan Intl flight prices

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

You are more likely to see cheaper flights to Boston from London when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $1,016 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from London for as low as $952 on momondo.

What cabin class options are available on London to Boston Logan Intl flights?

There are 2 cabin classes available to choose from on London to Boston Logan Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have London to Boston flight prices changed over time?

As of March 2025, prices for London to Boston flights are approximately 12% more expensive when compared to flights at the same time last year.

When to book flights from London to Boston

Are you open to changing your travel dates? Check out the ideal times to fly from London to Boston according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to Boston (LON to BOS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Boston

Best price found

$511

Fastest flight time

7h 15m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from London in the past 72 hours is $511. The best return flight deal from London to Boston found on momondo in the last 72 hours is $740.
The fastest flight from London to Boston takes 7h 15m
Direct flights go from London to Boston every day.
There is 1 airport near Boston: Boston Logan Intl (BOS)

  • How far is London to Boston Logan Intl by plane?

    There are 5260.9 km between London and Boston Logan Intl. A reasonable flight in good conditions will take 7h 15m.

  • When did momondo last update prices for flights from London to Boston Logan Intl Airport?

    Prices for flights from London to Boston Logan Intl Airport were last updated today.

  • How old do you have to be to fly from London to Boston Logan Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The travel and health documents required for your trip to Boston Logan Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Boston Logan Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London to Boston?


Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Somerville
Cambridge
Westford
Waltham
Chelsea
Seekonk
Brookline

Why use momondo?

Why should I use momondo to find a flight deal from London to Boston?

It is quick and easy to find London to Boston flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Boston that suits you.

Can I find flights from London to Boston with flexible booking policies on momondo?

momondo does allow users to show only those flights to Boston from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Boston?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Boston.

I’m not ready to book a flight from London to Boston right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Boston from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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