Cheap flights from London to Boston from $585

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 9/3. 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

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.

Find the cheapest flights from London to Boston

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
06:35 - 19:35
LHR
-
BOS
17h 00m
1 stop
United Airlines Logo
18:40 - 21:00
BOS
-
LHR
21h 20m
1 stop
$723United Airlines
vr, 13 mrt. - di, 14 apr.
United Airlines Logo
09:00 - 17:50
LHR
-
BOS
13h 50m
1 stop
United Airlines Logo
14:20 - 10:25
BOS
-
LHR
15h 05m
2 stops
$724United Airlines
za, 21 feb. - za, 28 feb.
United Airlines Logo
09:00 - 17:50
LHR
-
BOS
13h 50m
1 stop
United Airlines Logo
14:20 - 10:25
BOS
-
LHR
15h 05m
2 stops
$726United Airlines
vr, 20 feb. - za, 28 feb.
United Airlines Logo
09:00 - 17:40
LHR
-
BOS
13h 40m
1 stop
United Airlines Logo
20:05 - 17:05
BOS
-
LHR
16h 00m
1 stop
$729United Airlines
di, 21 apr. - wo, 20 mei.
United Airlines Logo
09:00 - 17:50
LHR
-
BOS
13h 50m
1 stop
United Airlines Logo
06:00 - 20:35
BOS
-
LHR
9h 35m
1 stop
$730United Airlines
zo, 1 feb. - vr, 27 feb.
United Airlines Logo
07:30 - 16:22
LHR
-
BOS
13h 52m
2 stops
United Airlines Logo
16:23 - 11:45
BOS
-
LHR
14h 22m
1 stop
$732United Airlines
vr, 17 apr. - zo, 19 apr.
United Airlines Logo
13:25 - 19:42
LHR
-
BOS
11h 17m
1 stop
United Airlines Logo
13:55 - 06:20
BOS
-
LHR
11h 25m
1 stop
$733United Airlines
ma, 2 feb. - zo, 15 feb.
United Airlines Logo
13:35 - 00:36
LHR
-
BOS
16h 01m
1 stop
United Airlines Logo
19:34 - 10:50
BOS
-
LHR
11h 16m
1 stop
$734United Airlines
za, 7 mrt. - za, 14 mrt.
British Airways Logo
17:05 - 19:45
LHR
-
BOS
7h 40mdirect
British Airways Logo
15:35 - 06:15
BOS
-
LHR
9h 40m
1 stop
$736British Airways
ma, 2 feb. - ma, 9 feb.
United Airlines Logo
07:30 - 14:10
LHR
-
BOS
10h 40m
1 stop
United Airlines Logo
17:25 - 07:45
BOS
-
LHR
10h 20m
1 stop
$737United Airlines
vr, 20 mrt. - ma, 23 mrt.

United Airlines flights from London to Boston

Our best United Airlines deals on London to Boston flight tickets
United Airlines
13 Mar
LHR06:35London Heathrow
17h 00m
1 stop
BOS19:35Boston Logan Intl
14 Apr
BOS18:40Boston Logan Intl
21h 20m
1 stop
LHR21:00London Heathrow
$723
United Airlines
21 Feb
LHR09:00London Heathrow
13h 50m
1 stop
BOS17:50Boston Logan Intl
28 Feb
BOS14:20Boston Logan Intl
15h 05m
2 stops
LHR10:25London Heathrow
$724
United Airlines
20 Feb
LHR09:00London Heathrow
13h 50m
1 stop
BOS17:50Boston Logan Intl
28 Feb
BOS14:20Boston Logan Intl
15h 05m
2 stops
LHR10:25London Heathrow
$726

British Airways flights from London to Boston

Our best British Airways deals on London to Boston flight tickets
British Airways
2 Feb
LHR17:05London Heathrow
7h 40m
BOS19:45Boston Logan Intl
9 Feb
BOS15:35Boston Logan Intl
9h 40m
1 stop
LHR06:15London Heathrow
$736
British Airways
2 Feb
LHR11:40London Heathrow
7h 40m
BOS14:20Boston Logan Intl
9 Feb
BOS18:55Boston Logan Intl
6h 35m
LHR06:30London Heathrow
$742
British Airways
10 Feb
LHR17:05London Heathrow
7h 40m
BOS19:45Boston Logan Intl
17 Feb
BOS18:55Boston Logan Intl
6h 35m
LHR06:30London Heathrow
$743

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 22 januari 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

LHR - BOS

LHRBOS

London Heathrow

vr 13/3

06:35-19:35

1 stop17h 00m

Boston Logan Intl

di 14/4

18:40-21:00

1 stop21h 20m

$723

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

za 21/2

09:00-17:50

1 stop13h 50m

Boston Logan Intl

za 28/2

14:20-10:25

2 stops15h 05m

$724

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

vr 20/2

09:00-17:50

1 stop13h 50m

Boston Logan Intl

za 28/2

14:20-10:25

2 stops15h 05m

$726

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

di 21/4

09:00-17:40

1 stop13h 40m

Boston Logan Intl

wo 20/5

20:05-17:05

1 stop16h 00m

$729

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

zo 1/2

09:00-17:50

1 stop13h 50m

Boston Logan Intl

vr 27/2

06:00-20:35

1 stop9h 35m

$730

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

vr 17/4

07:30-16:22

2 stops13h 52m

Boston Logan Intl

zo 19/4

16:23-11:45

1 stop14h 22m

$732

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

ma 2/2

13:25-19:42

1 stop11h 17m

Boston Logan Intl

zo 15/2

13:55-06:20

1 stop11h 25m

$733

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

za 7/3

13:35-00:36

1 stop16h 01m

Boston Logan Intl

za 14/3

19:34-10:50

1 stop11h 16m

$734

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

ma 2/2

17:05-19:45

Nonstop7h 40m

Boston Logan Intl

ma 9/2

15:35-06:15

1 stop9h 40m

$736

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

vr 20/3

07:30-14:10

1 stop10h 40m

Boston Logan Intl

ma 23/3

17:25-07:45

1 stop10h 20m

$737

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $777. The month of February is another great option to travel to Boston, with average flight prices from London averaging around $791.

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 $892. 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 $1,108. 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 $833. 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 $1,616 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 $928 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 $837 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 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

Fastest flight time

7h 25m

Direct flights

Every day

Airports in Boston

1 airport
The fastest flight from London to Boston takes 7h 25m
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 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 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
Westford
Cambridge
Brookline
Old Orchard Beach
Revere
Chelsea
Salem
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

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
za 21/2
za 28/2

Find better results for your trip to the United States

Airports servicing Massachusetts