Cheap flights from London to Boston from $650

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 26/3. 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

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United Airlines Logo
06:30 - 17:14
LHR
-
BOS
15h 44m2 stops
United Airlines Logo
14:20 - 08:25
BOS
-
LHR
13h 05m2 stops
$852United Airlines
Mon, 26 Jan - Mon, 2 Feb
British Airways Logo
06:15 - 15:15
LHR
-
BOS
14h 00m1 stop
British Airways Logo
18:55 - 06:30
BOS
-
LHR
6h 35mdirect
$853British Airways
Sat, 7 Feb - Sun, 15 Feb
United Airlines Logo
06:50 - 18:32
LHR
-
BOS
16h 42m2 stops
United Airlines Logo
19:28 - 11:05
BOS
-
LHR
10h 37m1 stop
$855United Airlines
Mon, 26 Jan - Mon, 2 Feb
United Airlines Logo
06:50 - 17:14
LHR
-
BOS
15h 24m2 stops
United Airlines Logo
22:10 - 13:00
BOS
-
LHR
9h 50m1 stop
$858United Airlines
Mon, 12 Jan - Mon, 19 Jan
Icelandair Logo
12:15 - 17:50
LHR
-
BOS
10h 35m1 stop
Icelandair Logo
23:30 - 20:20
BOS
-
LHR
15h 50m1 stop
$859Icelandair
Mon, 12 Jan - Fri, 3 Apr
Icelandair Logo
20:35 - 17:50
LHR
-
BOS
26h 15m1 stop
Icelandair Logo
23:30 - 20:20
BOS
-
LHR
15h 50m1 stop
$862Icelandair
Sun, 11 Jan - Fri, 3 Apr
Scandinavian Airlines Logo
06:40 - 15:50
LHR
-
BOS
14h 10m1 stop
Scandinavian Airlines Logo
17:40 - 21:40
BOS
-
LHR
23h 00m1 stop
$867Scandinavian Airlines
Tue, 13 Jan - Sat, 4 Apr
United Airlines Logo
06:50 - 17:14
LHR
-
BOS
15h 24m2 stops
United Airlines Logo
10:30 - 07:10
BOS
-
LHR
15h 40m2 stops
$870United Airlines
Mon, 12 Jan - Mon, 19 Jan
Scandinavian Airlines Logo
19:50 - 15:50
LHR
-
BOS
49h 00m2 stops
Scandinavian Airlines Logo
17:40 - 09:20
BOS
-
LHR
10h 40m1 stop
$871Scandinavian Airlines
Tue, 13 Jan - Sat, 4 Apr
SWISS Logo
09:00 - 20:20
LHR
-
BOS
16h 20m2 stops
SWISS Logo
21:50 - 13:00
BOS
-
LHR
10h 10m1 stop
$883SWISS
Wed, 11 Feb - Wed, 18 Feb

United Airlines flights from London to Boston

Our best United Airlines deals on London to Boston flight tickets
United Airlines
26 Jan
LHR06:30London Heathrow
15h 44m
2 stops
BOS17:14Boston Logan Intl
2 Feb
BOS14:20Boston Logan Intl
13h 05m
2 stops
LHR08:25London Heathrow
United Airlines
26 Jan
LHR06:50London Heathrow
16h 42m
2 stops
BOS18:32Boston Logan Intl
2 Feb
BOS19:28Boston Logan Intl
10h 37m
1 stop
LHR11:05London Heathrow
United Airlines
12 Jan
LHR06:50London Heathrow
15h 24m
2 stops
BOS17:14Boston Logan Intl
19 Jan
BOS22:10Boston Logan Intl
9h 50m
1 stop
LHR13:00London Heathrow

British Airways flights from London to Boston

Our best British Airways deals on London to Boston flight tickets
British Airways
7 Feb
LHR06:15London Heathrow
14h 00m
1 stop
BOS15:15Boston Logan Intl
15 Feb
BOS18:55Boston Logan Intl
6h 35m
LHR06:30London Heathrow
British Airways
8 Feb
LHR19:10London Heathrow
7h 45m
BOS21:55Boston Logan Intl
18 Feb
BOS15:47Boston Logan Intl
9h 33m
1 stop
LHR06:20London Heathrow
British Airways
8 Feb
LHR19:10London Heathrow
7h 45m
BOS21:55Boston Logan Intl
15 Feb
BOS18:55Boston Logan Intl
6h 35m
LHR06:30London 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 78,305 searches. Data last updated 14 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

LHR - BOS

LHRBOS

London Heathrow

Mon 26/1

06:30-17:14

2 stops15h 44m

Boston Logan Intl

Mon 2/2

14:20-08:25

2 stops13h 05m

$852

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sat 7/2

06:15-15:15

1 stop14h 00m

Boston Logan Intl

Sun 15/2

18:55-06:30

Nonstop6h 35m

$853

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 26/1

06:50-18:32

2 stops16h 42m

Boston Logan Intl

Mon 2/2

19:28-11:05

1 stop10h 37m

$855

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 12/1

06:50-17:14

2 stops15h 24m

Boston Logan Intl

Mon 19/1

22:10-13:00

1 stop9h 50m

$858

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 12/1

12:15-17:50

1 stop10h 35m

Boston Logan Intl

Fri 3/4

23:30-20:20

1 stop15h 50m

$859

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sun 11/1

20:35-17:50

1 stop26h 15m

Boston Logan Intl

Fri 3/4

23:30-20:20

1 stop15h 50m

$862

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 13/1

06:40-15:50

1 stop14h 10m

Boston Logan Intl

Sat 4/4

17:40-21:40

1 stop23h 00m

$867

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 12/1

06:50-17:14

2 stops15h 24m

Boston Logan Intl

Mon 19/1

10:30-07:10

2 stops15h 40m

$870

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 13/1

19:50-15:50

2 stops49h 00m

Boston Logan Intl

Sat 4/4

17:40-09:20

1 stop10h 40m

$871

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 11/2

09:00-20:20

2 stops16h 20m

Boston Logan Intl

Wed 18/2

21:50-13:00

1 stop10h 10m

$883

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?

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 $790. The month of February is another great option to travel to Boston, with average flight prices from London averaging around $799.

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 $935. 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 $1,355. 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 $845. 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 $1,355 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 $935 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 $855 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 76% 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 December 2025, prices for London to Boston flights are approximately 32% 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 35m

Direct flights

Every day

Airports in Boston

1 airport
The fastest flight from London to Boston takes 7h 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?

    There are 5260.9 km between London and Boston Logan Intl. A reasonable flight in good conditions will take 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 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
Revere
Salem
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.

An easier way to manage your Boston trip

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1 adult
Tue 13/1
Tue 20/1

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