Cheap flights from London to Boston from €374

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 16/1. 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.
Icelandair Logo
15:40 - 22:10
LGW
-
BOS
11h 30m1 stop
Icelandair Logo
23:30 - 14:40
BOS
-
LGW
10h 10m1 stop
€485Icelandair
Wed, 8 Apr - Mon, 4 May
United Airlines Logo
13:00 - 22:37
LHR
-
BOS
14h 37m1 stop
United Airlines Logo
10:15 - 07:10
BOS
-
LHR
15h 55m1 stop
€485United Airlines
Mon, 29 Dec - Sat, 31 Jan
Icelandair Logo
15:40 - 18:50
LGW
-
BOS
32h 10m1 stop
Icelandair Logo
23:30 - 14:40
BOS
-
LGW
10h 10m1 stop
€486Icelandair
Tue, 7 Apr - Mon, 4 May
Scandinavian Airlines Logo
06:40 - 15:35
LHR
-
BOS
13h 55m2 stops
Scandinavian Airlines Logo
17:40 - 17:00
BOS
-
LHR
18h 20m2 stops
€487Scandinavian Airlines
Thu, 23 Apr - Sun, 26 Apr
LEVEL Logo
17:20 - 20:55
LGW
-
BOS
32h 35m1 stop
LEVEL Logo
22:40 - 09:10
BOS
-
LGW
29h 30m1 stop
€488LEVEL
Mon, 26 Jan - Mon, 2 Feb
Icelandair Logo
13:05 - 18:50
LHR
-
BOS
10h 45m1 stop
Icelandair Logo
20:50 - 11:55
BOS
-
LHR
10h 05m1 stop
€488Icelandair
Wed, 8 Apr - Tue, 5 May
Scandinavian Airlines Logo
17:00 - 15:20
LHR
-
BOS
26h 20m1 stop
Scandinavian Airlines Logo
17:40 - 16:00
BOS
-
LHR
17h 20m1 stop
€490Scandinavian Airlines
Sat, 28 Mar - Wed, 8 Apr
British Airways Logo
17:00 - 22:56
LHR
-
BOS
10h 56m1 stop
British Airways Logo
07:30 - 19:00
BOS
-
LHR
6h 30mdirect
€492British Airways
Wed, 7 Jan - Thu, 29 Jan
British Airways Logo
11:25 - 19:50
LHR
-
BOS
13h 25m1 stop
British Airways Logo
21:35 - 09:15
BOS
-
LHR
6h 40mdirect
€495British Airways
Wed, 21 Jan - Mon, 26 Jan
TAP AIR PORTUGAL Logo
10:40 - 14:45
LGW
-
BOS
33h 05m1 stop
TAP AIR PORTUGAL Logo
18:05 - 09:50
BOS
-
LGW
10h 45m1 stop
€497TAP AIR PORTUGAL
Mon, 22 Dec - Sat, 17 Jan

Icelandair flights from London to Boston

Our best Icelandair deals on London to Boston flight tickets
Icelandair
8 Apr
LGW15:40London Gatwick
11h 30m
1 stop
BOS22:10Boston Logan Intl
4 May
BOS23:30Boston Logan Intl
10h 10m
1 stop
LGW14:40London Gatwick
Icelandair
7 Apr
LGW15:40London Gatwick
32h 10m
1 stop
BOS18:50Boston Logan Intl
4 May
BOS23:30Boston Logan Intl
10h 10m
1 stop
LGW14:40London Gatwick
Icelandair
8 Apr
LHR13:05London Heathrow
10h 45m
1 stop
BOS18:50Boston Logan Intl
5 May
BOS20:50Boston Logan Intl
10h 05m
1 stop
LHR11:55London Heathrow

United Airlines flights from London to Boston

Our best United Airlines deals on London to Boston flight tickets
United Airlines
29 Dec
LHR11:10London Heathrow
16h 27m
1 stop
BOS22:37Boston Logan Intl
6 Feb
BOS15:35Boston Logan Intl
10h 35m
1 stop
LHR07:10London Heathrow
United Airlines
15 Jan
LHR13:45London Heathrow
11h 15m
1 stop
BOS20:00Boston Logan Intl
22 Jan
BOS06:00Boston Logan Intl
9h 35m
1 stop
LHR20:35London Heathrow
United Airlines
25 Feb
LHR12:05London Heathrow
13h 15m
1 stop
BOS20:20Boston Logan Intl
7 Mar
BOS15:35Boston Logan Intl
10h 35m
1 stop
LHR07:10London Heathrow

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 4 December 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

LGW - BOS

LGWBOS

London Gatwick

Wed 8/4

15:40-22:10

1 stop11h 30m

Boston Logan Intl

Mon 4/5

23:30-14:40

1 stop10h 10m

€485

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 29/12

13:00-22:37

1 stop14h 37m

Boston Logan Intl

Sat 31/1

10:15-07:10

1 stop15h 55m

€485

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Tue 7/4

15:40-18:50

1 stop32h 10m

Boston Logan Intl

Mon 4/5

23:30-14:40

1 stop10h 10m

€486

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 23/4

06:40-15:35

2 stops13h 55m

Boston Logan Intl

Sun 26/4

17:40-17:00

2 stops18h 20m

€487

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Mon 26/1

17:20-20:55

1 stop32h 35m

Boston Logan Intl

Mon 2/2

22:40-09:10

1 stop29h 30m

€488

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 8/4

13:05-18:50

1 stop10h 45m

Boston Logan Intl

Tue 5/5

20:50-11:55

1 stop10h 05m

€488

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sat 28/3

17:00-15:20

1 stop26h 20m

Boston Logan Intl

Wed 8/4

17:40-16:00

1 stop17h 20m

€490

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 7/1

17:00-22:56

1 stop10h 56m

Boston Logan Intl

Thu 29/1

07:30-19:00

Nonstop6h 30m

€492

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 21/1

11:25-19:50

1 stop13h 25m

Boston Logan Intl

Mon 26/1

21:35-09:15

Nonstop6h 40m

€495

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Mon 22/12

10:40-14:45

1 stop33h 05m

Boston Logan Intl

Sat 17/1

18:05-09:50

1 stop10h 45m

€497

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 €458.

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 €658. Flights from London to Boston on a Monday will generally be more expensive and average around €1,061. 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 €594 when looking at flights departing in the morning. Flights in the evening are often more expensive, with an average ticket price of €1,061.

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 €534 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 €505 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?

No. A direct flight is the cheapest option for a flight between London to Boston.

How have London to Boston flight prices changed over time?

As of December 2025, prices for London to Boston flights are approximately 30% 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

10h 45m

Direct flights

Every day

Airports in Boston

1 airport
The fastest flight from London to Boston takes 10h 45m
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 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
Everett
Brookline
Quincy
Cambridge
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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1 adult
Sat 3/1
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