Cheap flights from London to Boston from €340

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.
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0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
11:45 - 19:50
LGW
-
BOS
13h 05m
1 stop
British Airways Logo
15:49 - 19:00
BOS
-
LGW
23h 11m
2 stops
€426British Airways
Tue, 3 Mar - Mon, 16 Mar
United Airlines Logo
09:30 - 20:15
LHR
-
BOS
14h 45m
2 stops
United Airlines Logo
06:00 - 21:35
BOS
-
LHR
10h 35m
1 stop
€427United Airlines
Wed, 18 Mar - Tue, 14 Apr
United Airlines Logo
07:40 - 21:48
LHR
-
BOS
19h 08m
1 stop
United Airlines Logo
18:40 - 20:35
BOS
-
LHR
20h 55m
1 stop
€429United Airlines
Sat, 14 Feb - Sat, 21 Feb
Icelandair Logo
13:00 - 18:50
LGW
-
BOS
10h 50m
1 stop
Icelandair Logo
23:00 - 11:45
BOS
-
LGW
31h 45m
1 stop
€437Icelandair
Thu, 21 May - Fri, 29 May
Multiple Airlines Logo
13:45 - 20:20
LHR
-
BOS
11h 35m
1 stop
Multiple Airlines Logo
16:25 - 07:45
BOS
-
LHR
10h 20m
1 stop
€438Multiple Airlines
Tue, 17 Feb - Wed, 4 Mar
SWISS Logo
07:00 - 20:20
LHR
-
BOS
18h 20m
2 stops
SWISS Logo
22:10 - 16:20
BOS
-
LHR
13h 10m
1 stop
€439SWISS
Wed, 4 Feb - Sun, 22 Feb
Lufthansa Logo
09:15 - 15:40
LCY
-
BOS
11h 25m
1 stop
Lufthansa Logo
17:45 - 08:40
BOS
-
LCY
9h 55m
1 stop
€444Lufthansa
Tue, 21 Apr - Thu, 7 May
Icelandair Logo
11:55 - 17:50
LGW
-
BOS
10h 55m
1 stop
Icelandair Logo
20:50 - 10:55
BOS
-
LGW
10h 05m
1 stop
€450Icelandair
Tue, 3 Mar - Mon, 16 Mar
Lufthansa Logo
09:15 - 15:40
LCY
-
BOS
11h 25m
1 stop
Lufthansa Logo
17:45 - 08:40
BOS
-
LCY
9h 55m
1 stop
€472Lufthansa
Fri, 1 May - Wed, 6 May
Multiple Airlines Logo
06:30 - 14:35
STN
-
BOS
13h 05m
1 stop
Multiple Airlines Logo
19:05 - 18:10
BOS
-
STN
19h 05m
1 stop
€540Multiple Airlines
Wed, 4 Mar - Wed, 11 Mar

British Airways flights from London to Boston

Our best British Airways deals on London to Boston flight tickets
British Airways
27 Jan
LHR13:30London Heathrow
7h 45m
BOS16:15Boston Logan Intl
3 Feb
BOS19:34Boston Logan Intl
9h 06m
1 stop
LHR09:40London Heathrow
€425
British Airways
3 Mar
LGW11:45London Gatwick
13h 05m
1 stop
BOS19:50Boston Logan Intl
16 Mar
BOS15:49Boston Logan Intl
23h 11m
2 stops
LGW19:00London Gatwick
€426
British Airways
4 Mar
LHR11:40London Heathrow
7h 40m
BOS14:20Boston Logan Intl
11 Mar
BOS22:35Boston Logan Intl
6h 40m
LHR09:15London Heathrow
€431

United Airlines flights from London to Boston

Our best United Airlines deals on London to Boston flight tickets
United Airlines
18 Mar
LHR09:30London Heathrow
14h 45m
2 stops
BOS20:15Boston Logan Intl
14 Apr
BOS06:00Boston Logan Intl
10h 35m
1 stop
LHR21:35London Heathrow
€427
United Airlines
14 Feb
LHR07:40London Heathrow
19h 08m
1 stop
BOS21:48Boston Logan Intl
21 Feb
BOS18:40Boston Logan Intl
20h 55m
1 stop
LHR20:35London Heathrow
€429
United Airlines
3 Apr
LHR12:10London Heathrow
32h 20m
1 stop
BOS15:30Boston Logan Intl
3 May
BOS06:00Boston Logan Intl
9h 40m
1 stop
LHR20:40London Heathrow
€430

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 20 January 2026.
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

LGW - BOS

LGWBOS

London Gatwick

Tue 3/3

11:45-19:50

1 stop13h 05m

Boston Logan Intl

Mon 16/3

15:49-19:00

2 stops23h 11m

€426

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 18/3

09:30-20:15

2 stops14h 45m

Boston Logan Intl

Tue 14/4

06:00-21:35

1 stop10h 35m

€427

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sat 14/2

07:40-21:48

1 stop19h 08m

Boston Logan Intl

Sat 21/2

18:40-20:35

1 stop20h 55m

€429

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Thu 21/5

13:00-18:50

1 stop10h 50m

Boston Logan Intl

Fri 29/5

23:00-11:45

1 stop31h 45m

€437

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 17/2

13:45-20:20

1 stop11h 35m

Boston Logan Intl

Wed 4/3

16:25-07:45

1 stop10h 20m

€438

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 4/2

07:00-20:20

2 stops18h 20m

Boston Logan Intl

Sun 22/2

22:10-16:20

1 stop13h 10m

€439

LondonBoston

LCY - BOS

LCYBOS

London City

Tue 21/4

09:15-15:40

1 stop11h 25m

Boston Logan Intl

Thu 7/5

17:45-08:40

1 stop9h 55m

€444

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Tue 3/3

11:55-17:50

1 stop10h 55m

Boston Logan Intl

Mon 16/3

20:50-10:55

1 stop10h 05m

€450

LondonBoston

LCY - BOS

LCYBOS

London City

Fri 1/5

09:15-15:40

1 stop11h 25m

Boston Logan Intl

Wed 6/5

17:45-08:40

1 stop9h 55m

€472

LondonBoston

STN - BOS

STNBOS

London Stansted

Wed 4/3

06:30-14:35

1 stop13h 05m

Boston Logan Intl

Wed 11/3

19:05-18:10

1 stop19h 05m

€540

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 September is, on average, the cheapest month to fly to Boston from London, with most prices found around €451. The month of February is another great option to travel to Boston, with average flight prices from London averaging around €459.

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

The cheapest day to depart from London to Boston is on a Saturday when prices can be found for as low as €711. Flights from London to Boston on a Monday will generally be more expensive and average around €1,165. 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 €595 when looking at flights departing in the morning. Flights in the evening are often more expensive, with an average ticket price of €1,063.

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 €539 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 €486 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 63% 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 January 2026, prices for London to Boston flights are approximately 102% 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

€482

Fastest flight time

10h 35m

Direct flights

Every day

Airports in Boston

1 airport
The best flight deal from London to Boston found on momondo in the last 72 hours is €482
The fastest flight from London to Boston takes 10h 35m
Direct flights go from London to Boston every day.
There is 1 airport in Boston. From London there are direct flights to 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 10h 35m.

  • 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
Cambridge
Everett
Quincy
Brookline
Medford
Warwick
Woburn

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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