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Cheap flights from London to Boston from $686

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London to Boston departing on 3/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

United Airlines Logo
07:40 - 18:02LHR-BOS
15h 22m2 stops
United Airlines Logo
15:10 - 07:55BOS-LHR
11h 45m1 stop
$686United Airlines
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Mon, 3 Nov - Sat, 8 Nov
United Airlines Logo
08:40 - 15:25LHR-BOS
11h 45m1 stop
United Airlines Logo
10:20 - 06:30BOS-LHR
15h 10m1 stop
$687United Airlines
Find Deal
Wed, 1 Oct - Fri, 10 Oct
SWISS Logo
06:00 - 15:25LHR-BOS
14h 25m1 stop
SWISS Logo
17:05 - 17:50BOS-LHR
19h 45m1 stop
$691SWISS
Find Deal
Mon, 6 Oct - Fri, 17 Oct
SWISS Logo
06:00 - 15:25LHR-BOS
14h 25m1 stop
SWISS Logo
21:40 - 16:25BOS-LHR
13h 45m1 stop
$692SWISS
Find Deal
Mon, 6 Oct - Tue, 14 Oct
Austrian Airlines Logo
19:25 - 14:05LHR-BOS
23h 40m1 stop
Austrian Airlines Logo
14:21 - 10:50BOS-LHR
15h 29m1 stop
$694Austrian Airlines
Find Deal
Mon, 3 Nov - Tue, 11 Nov
Austrian Airlines Logo
06:00 - 17:54LHR-BOS
16h 54m2 stops
Austrian Airlines Logo
12:40 - 11:25BOS-LHR
17h 45m1 stop
$701Austrian Airlines
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Thu, 9 Oct - Mon, 13 Oct
Lufthansa Logo
09:00 - 17:40LHR-BOS
13h 40m1 stop
Lufthansa Logo
20:05 - 15:40BOS-LHR
14h 35m1 stop
$703Lufthansa
Find Deal
Tue, 2 Sep - Thu, 11 Sep
Scandinavian Airlines Logo
15:35 - 15:35LHR-BOS
29h 00m2 stops
Scandinavian Airlines Logo
17:40 - 17:40BOS-LHR
19h 00m1 stop
$706Scandinavian Airlines
Find Deal
Sat, 27 Sep - Mon, 6 Oct
Lufthansa Logo
20:25 - 17:40LHR-BOS
26h 15m1 stop
Lufthansa Logo
19:12 - 10:40BOS-LHR
10h 28m1 stop
$709Lufthansa
Find Deal
Mon, 1 Sep - Mon, 15 Sep
Scandinavian Airlines Logo
21:05 - 15:35LHR-BOS
23h 30m2 stops
Scandinavian Airlines Logo
17:40 - 14:35BOS-LHR
15h 55m2 stops
$716Scandinavian Airlines
Find Deal
Mon, 15 Sep - Mon, 20 Oct

United Airlines flights from London to Boston

Our best United Airlines deals on London to Boston flight tickets
United Airlines
3 Nov
LHR07:40London Heathrow
15h 22m
2 stops
BOS18:02Boston Logan Intl
8 Nov
BOS15:10Boston Logan Intl
11h 45m
1 stop
LHR07:55London Heathrow
United Airlines
1 Oct
LHR08:40London Heathrow
11h 45m
1 stop
BOS15:25Boston Logan Intl
10 Oct
BOS10:20Boston Logan Intl
15h 10m
1 stop
LHR06:30London Heathrow
United Airlines
11 Sept
LHR08:40London Heathrow
11h 45m
1 stop
BOS15:25Boston Logan Intl
14 Sept
BOS10:20Boston Logan Intl
15h 10m
1 stop
LHR06:30London Heathrow

SWISS flights from London to Boston

Our best SWISS deals on London to Boston flight tickets
SWISS
6 Oct
LHR06:00London Heathrow
14h 25m
1 stop
BOS15:25Boston Logan Intl
17 Oct
BOS17:05Boston Logan Intl
19h 45m
1 stop
LHR17:50London Heathrow
SWISS
6 Oct
LHR06:00London Heathrow
14h 25m
1 stop
BOS15:25Boston Logan Intl
14 Oct
BOS21:40Boston Logan Intl
13h 45m
1 stop
LHR16:25London Heathrow
SWISS
28 Aug
LHR06:00London Heathrow
14h 25m
1 stop
BOS15:25Boston Logan Intl
9 Sept
BOS17:05Boston Logan Intl
19h 45m
1 stop
LHR17:50London 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 typical price of a round-trip flight between London and Boston?

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 $802. The month of February is another great option to travel to Boston, with average flight prices from London averaging around $811.

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 Thursday. momondo users have found tickets for Thursday departures for as low as $949. 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 Sunday because tickets tend to average around $1,375. 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 afternoon. momondo users have found flights departing from London to Boston in the afternoon for as low as $894. 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 $1,375 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 weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $962 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from London for as low as $870 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.

Can stopping save me money on London to Boston flights?

You could potentially save up to 43% on your flight if you consider stops on a London to Boston flight.

How have London to Boston flight prices changed over time?

As of July 2025, prices for London to Boston flights are approximately 10% cheaper 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

$921

Fastest flight time

7h 32m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from London in the past 72 hours is $921. The best return flight deal from London to Boston found on momondo in the last 72 hours is $686.
The fastest flight from London to Boston takes 7h 32m
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 45m.

  • 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
Cambridge
Westford
Old Orchard Beach
Salem
Waltham
Chelsea
Seekonk
Sturbridge

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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1 adult
Fri 11/7
Fri 18/7

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