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Cheap flights from London to Boston from €228

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 23/4. 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
0 bags
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Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from London to Boston.
 Logo
06:15 - 17:50LTN-BOS
16h 35m1 stop
 Logo
19:15 - 13:00BOS-LTN
12h 45m1 stop
€351
Find Deal
Wed, 7 May - Tue, 20 May
 Logo
06:15 - 17:50LTN-BOS
16h 35m1 stop
 Logo
19:15 - 13:00BOS-LTN
12h 45m1 stop
€353
Find Deal
Wed, 7 May - Tue, 20 May
PLAY Logo
11:40 - 17:50STN-BOS
11h 10m1 stop
PLAY Logo
19:15 - 10:40BOS-STN
10h 25m1 stop
€355PLAY
Find Deal
Thu, 11 Sep - Wed, 24 Sep
PLAY Logo
11:40 - 17:50STN-BOS
11h 10m1 stop
PLAY Logo
19:15 - 10:40BOS-STN
10h 25m1 stop
€355PLAY
Find Deal
Wed, 17 Sep - Wed, 24 Sep
United Airlines Logo
13:30 - 22:10LHR-BOS
13h 40m2 stops
United Airlines Logo
18:33 - 11:45BOS-LHR
12h 12m1 stop
€391United Airlines
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Thu, 11 Sep - Tue, 16 Sep
United Airlines Logo
08:40 - 15:25LHR-BOS
11h 45m1 stop
United Airlines Logo
15:20 - 06:30BOS-LHR
10h 10m1 stop
€402United Airlines
Find Deal
Mon, 12 May - Tue, 20 May
SWISS Logo
18:35 - 15:25LGW-BOS
25h 50m1 stop
SWISS Logo
21:40 - 17:50BOS-LGW
15h 10m1 stop
€406SWISS
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Wed, 7 May - Mon, 12 May
SWISS Logo
18:35 - 15:25LGW-BOS
25h 50m1 stop
SWISS Logo
21:40 - 17:50BOS-LGW
15h 10m1 stop
€407SWISS
Find Deal
Tue, 6 May - Tue, 13 May
Austrian Airlines Logo
19:30 - 13:50LHR-BOS
23h 20m1 stop
Austrian Airlines Logo
10:30 - 06:45BOS-LHR
15h 15m1 stop
€410Austrian Airlines
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Thu, 8 May - Thu, 22 May
Austrian Airlines Logo
06:00 - 19:32LHR-BOS
18h 32m2 stops
Austrian Airlines Logo
11:07 - 20:40BOS-LHR
28h 33m1 stop
€414Austrian Airlines
Find Deal
Mon, 12 May - Mon, 19 May

United Airlines flights from London to Boston

Our best United Airlines deals on London to Boston flight tickets
United Airlines
11 Sept
LHR13:30London Heathrow
13h 40m
2 stops
BOS22:10Boston Logan Intl
16 Sept
BOS18:33Boston Logan Intl
12h 12m
1 stop
LHR11:45London Heathrow
United Airlines
12 May
LHR08:40London Heathrow
11h 45m
1 stop
BOS15:25Boston Logan Intl
20 May
BOS15:20Boston Logan Intl
10h 10m
1 stop
LHR06:30London Heathrow
United Airlines
4 Sept
LHR06:30London Heathrow
20h 40m
2 stops
BOS22:10Boston Logan Intl
15 Sept
BOS18:40Boston Logan Intl
30h 50m
1 stop
LHR06:30London Heathrow

PLAY flights from London to Boston

Our best PLAY deals on London to Boston flight tickets
PLAY
11 Sept
STN11:40London Stansted
11h 10m
1 stop
BOS17:50Boston Logan Intl
24 Sept
BOS19:15Boston Logan Intl
10h 25m
1 stop
STN10:40London Stansted
PLAY
17 Sept
STN11:40London Stansted
11h 10m
1 stop
BOS17:50Boston Logan Intl
24 Sept
BOS19:15Boston Logan Intl
10h 25m
1 stop
STN10:40London Stansted
PLAY
11 Sept
STN11:40London Stansted
11h 10m
1 stop
BOS17:50Boston Logan Intl
24 Sept
BOS19:15Boston Logan Intl
10h 25m
1 stop
STN10:40London Stansted

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?

The month of September is, on average, the cheapest month to fly to Boston from London, with most prices found around €466. The month of February is another great option to travel to Boston, with average flight prices from London averaging around €469.

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

The cheapest day to depart from London to Boston is on a Monday when prices can be found for as low as €0. Flights from London to Boston on a Tuesday will generally be more expensive and average around €798. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Flying to Boston from London at midday is the least expensive time of day to depart. momondo users have found prices as low as €0 when looking at flights departing at midday. Flights in the morning are often more expensive, with an average ticket price of €595.

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 €564 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 €513 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 April 2025, prices for London to Boston flights are approximately 18% 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

€228

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 €228. The best return flight deal from London to Boston found on momondo in the last 72 hours is €351.
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?

    London and Boston Logan Intl are 5260.9 km apart from one another. In terms of flight time, this usually takes a little over 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 necessary travel and health documents for your Boston Logan Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • 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
Medford
Quincy
Brookline

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Boston for 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?

Once all potential London to Boston flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of London to Boston flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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