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Cheap flights from London to Boston from €347

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 20/2. 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

United Airlines Logo
13:30 - 20:10LHR-BOS
11h 40m1 stop
United Airlines Logo
06:00 - 20:40BOS-LHR
9h 40m1 stop
€383United Airlines
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Wed, 1 Oct - Sat, 11 Oct
United Airlines Logo
13:45 - 19:55LHR-BOS
11h 10m1 stop
United Airlines Logo
12:15 - 06:30BOS-LHR
13h 15m2 stops
€384United Airlines
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Thu, 2 Oct - Thu, 16 Oct
British Airways Logo
15:05 - 22:50LGW-BOS
12h 45m1 stop
British Airways Logo
15:00 - 08:10BOS-LGW
12h 10m1 stop
€387British Airways
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Tue, 30 Sep - Wed, 8 Oct
LEVEL Logo
21:05 - 20:55LGW-BOS
28h 50m1 stop
LEVEL Logo
22:40 - 23:20BOS-LGW
19h 40m1 stop
€387LEVEL
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Sun, 18 Jan - Sun, 25 Jan
Multiple Airlines Logo
08:45 - 15:25LHR-BOS
11h 40m1 stop
Multiple Airlines Logo
14:36 - 06:55BOS-LHR
11h 19m1 stop
€387Multiple Airlines
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Tue, 7 Oct - Tue, 14 Oct
LEVEL Logo
17:25 - 21:15LGW-BOS
32h 50m1 stop
LEVEL Logo
23:55 - 08:30BOS-LGW
27h 35m1 stop
€389LEVEL
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Wed, 15 Oct - Sun, 19 Oct
JetBlue Logo
12:10 - 15:08LGW-BOS
7h 58mdirect
JetBlue Logo
21:48 - 09:35BOS-LGW
6h 47mdirect
€390JetBlue
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Tue, 7 Oct - Tue, 14 Oct
British Airways Logo
15:05 - 22:19LGW-BOS
12h 14m1 stop
British Airways Logo
17:50 - 10:50BOS-LGW
13h 00m1 stop
€401British Airways
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Wed, 22 Oct - Tue, 28 Oct
JetBlue Logo
12:10 - 15:08LGW-BOS
7h 58mdirect
JetBlue Logo
21:48 - 09:35BOS-LGW
6h 47mdirect
€404JetBlue
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Wed, 15 Oct - Wed, 22 Oct
Multiple Airlines Logo
09:25 - 15:25LCY-BOS
11h 00m1 stop
Multiple Airlines Logo
17:20 - 09:15BOS-LCY
11h 55m1 stop
€409Multiple Airlines
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Wed, 22 Oct - Mon, 27 Oct

Delta flights from London to Boston

Our best Delta deals on London to Boston flight tickets
Delta
22 Sept
LHR09:55London Heathrow
11h 35m
1 stop
BOS16:30Boston Logan Intl
9 Oct
BOS19:05Boston Logan Intl
6h 40m
LHR06:45London Heathrow
€404
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Delta
6 Oct
LHR06:30London Heathrow
15h 00m
1 stop
BOS16:30Boston Logan Intl
13 Oct
BOS20:15Boston Logan Intl
6h 50m
LHR08:05London Heathrow
€404
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Delta
23 Sept
LHR06:30London Heathrow
15h 00m
1 stop
BOS16:30Boston Logan Intl
9 Oct
BOS19:05Boston Logan Intl
6h 40m
LHR06:45London Heathrow
€405
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KLM flights from London to Boston

Our best KLM deals on London to Boston flight tickets
KLM
3 Mar
LHR06:30London Heathrow
11h 50m
1 stop
BOS13:20Boston Logan Intl
9 Mar
BOS20:10Boston Logan Intl
6h 40m
LHR06:50London Heathrow
€412
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KLM
24 Sept
LCY07:45London City
10h 55m
1 stop
BOS13:40Boston Logan Intl
29 Sept
BOS18:45Boston Logan Intl
9h 05m
1 stop
LCY08:50London City
€442
Find similar
KLM
6 Oct
LCY08:40London City
10h 00m
1 stop
BOS13:40Boston Logan Intl
13 Oct
BOS16:50Boston Logan Intl
9h 25m
1 stop
LCY07:15London City
€443
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momondo Fare Finder

 
Customise your flight search to find flights from London to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 13,528 searches. Data last updated 17 September 2025.
Use the filters below to find and compare flights from London to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 1/10

13:30-20:10

1 stop11h 40m

Boston Logan Intl

Sat 11/10

06:00-20:40

1 stop9h 40m

€383

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 2/10

13:45-19:55

1 stop11h 10m

Boston Logan Intl

Thu 16/10

12:15-06:30

2 stops13h 15m

€384

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Tue 30/9

15:05-22:50

1 stop12h 45m

Boston Logan Intl

Wed 8/10

15:00-08:10

1 stop12h 10m

€387

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Sun 18/1

21:05-20:55

1 stop28h 50m

Boston Logan Intl

Sun 25/1

22:40-23:20

1 stop19h 40m

€387

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 7/10

08:45-15:25

1 stop11h 40m

Boston Logan Intl

Tue 14/10

14:36-06:55

1 stop11h 19m

€387

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 15/10

17:25-21:15

1 stop32h 50m

Boston Logan Intl

Sun 19/10

23:55-08:30

1 stop27h 35m

€389

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Tue 7/10

12:10-15:08

Nonstop7h 58m

Boston Logan Intl

Tue 14/10

21:48-09:35

Nonstop6h 47m

€390

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 22/10

15:05-22:19

1 stop12h 14m

Boston Logan Intl

Tue 28/10

17:50-10:50

1 stop13h 00m

€401

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 15/10

12:10-15:08

Nonstop7h 58m

Boston Logan Intl

Wed 22/10

21:48-09:35

Nonstop6h 47m

€404

LondonBoston

LCY - BOS

LCYBOS

London City

Wed 22/10

09:25-15:25

1 stop11h 00m

Boston Logan Intl

Mon 27/10

17:20-09:15

1 stop11h 55m

€409

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 February is, on average, the cheapest month to fly to Boston from London, with most prices found around €449. The month of September is another great option to travel to Boston, with average flight prices from London averaging around €449.

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

The cheapest day to depart from London to Boston is on a Tuesday when prices can be found for as low as €649. Flights from London to Boston on a Monday will generally be more expensive and average around €1,046. 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 in the morning is the least expensive time of day to depart. momondo users have found prices as low as €507 when looking at flights departing in the morning. Flights in the evening are often more expensive, with an average ticket price of €1,046.

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

Fly from London Gatwick 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 €522 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 €475 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 42% 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 September 2025, prices for London to Boston flights are approximately 54% 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

Fastest flight time

7h 20m

Direct flights

Every day

Airports in Boston

1 airport
The fastest flight from London to Boston takes 7h 20m
Direct flights go from London to Boston every day.
There is 1 airport near Boston: Boston Logan Intl (BOS)
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  • 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 25m.

  • 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
Quincy
Cambridge
Medford
Warwick
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.

An easier way to manage your Boston trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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