Cheap flights from London to Boston from $396

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 1/31. 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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Find the cheapest flights from London to Boston

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
1:30 pm - 5:10 pm
LHR
-
BOS
7h 40mnonstop
British Airways Logo
8:10 pm - 7:00 am
BOS
-
LHR
6h 50mnonstop
$500British Airways
Mon, Mar 9 - Mon, Mar 23
Multiple Airlines Logo
1:30 pm - 6:59 pm
STN
-
BOS
10h 29m
1 stop
Multiple Airlines Logo
9:15 pm - 2:50 pm
BOS
-
STN
12h 35m
1 stop
$501Multiple Airlines
Sat, Feb 14 - Sun, Feb 22
Icelandair Logo
11:55 am - 5:50 pm
LGW
-
BOS
10h 55m
1 stop
Icelandair Logo
7:50 pm - 10:55 am
BOS
-
LGW
10h 05m
1 stop
$501Icelandair
Mon, Feb 23 - Thu, Feb 26
Air Canada Logo
9:00 am - 5:50 pm
LHR
-
BOS
13h 50m
1 stop
Air Canada Logo
10:15 am - 6:30 am
BOS
-
LHR
16h 15m
2 stops
$501Air Canada
Sun, Mar 1 - Sun, Mar 8
American Airlines Logo
1:30 pm - 4:15 pm
LHR
-
BOS
7h 45mnonstop
American Airlines Logo
5:20 pm - 12:00 pm
BOS
-
LHR
13h 40m
1 stop
$502American Airlines
Tue, Jan 27 - Wed, Feb 4
Iberia Logo
11:45 am - 7:50 pm
LGW
-
BOS
13h 05m
1 stop
Iberia Logo
12:16 pm - 10:50 am
BOS
-
LGW
17h 34m
2 stops
$502Iberia
Wed, Feb 4 - Wed, Feb 11
Multiple Airlines Logo
12:25 pm - 6:59 pm
LTN
-
BOS
11h 34m
1 stop
Multiple Airlines Logo
9:15 pm - 11:45 am
BOS
-
LTN
9h 30m
1 stop
$502Multiple Airlines
Sat, Feb 14 - Sun, Feb 22
Icelandair Logo
11:55 am - 5:50 pm
LGW
-
BOS
10h 55m
1 stop
Icelandair Logo
12:35 pm - 10:55 am
BOS
-
LGW
18h 20m
1 stop
$505Icelandair
Sun, Mar 1 - Wed, Mar 11
Finnair Logo
7:30 am - 10:48 pm
LHR
-
BOS
20h 18m
2 stops
Finnair Logo
5:53 pm - 10:10 pm
BOS
-
LHR
23h 17m
1 stop
$505Finnair
Wed, Feb 25 - Sat, Feb 28
Iberia Logo
5:35 pm - 8:05 pm
LHR
-
BOS
7h 30mnonstop
Iberia Logo
8:15 pm - 8:00 am
BOS
-
LHR
6h 45mnonstop
$507Iberia
Wed, May 13 - Wed, May 20

TAP AIR PORTUGAL flights from London to Boston

Our best TAP AIR PORTUGAL deals on London to Boston flight tickets
TAP AIR PORTUGAL
Feb 15
LGW9:25 pmLondon Gatwick
22h 10m
2 stops
BOS2:35 pmBoston Logan Intl
Feb 22
BOS10:45 pmBoston Logan Intl
16h 50m
2 stops
LGW8:35 pmLondon Gatwick
$503
TAP AIR PORTUGAL
Apr 14
LGW9:15 pmLondon Gatwick
27h 40m
1 stop
BOS7:55 pmBoston Logan Intl
Apr 21
BOS6:05 pmBoston Logan Intl
10h 40m
1 stop
LGW9:45 amLondon Gatwick
$507
TAP AIR PORTUGAL
Feb 12
LGW10:10 amLondon Gatwick
15h 00m
2 stops
BOS8:10 pmBoston Logan Intl
Feb 23
BOS6:05 pmBoston Logan Intl
21h 30m
2 stops
LGW8:35 pmLondon Gatwick
$513

Icelandair flights from London to Boston

Our best Icelandair deals on London to Boston flight tickets
Icelandair
Feb 23
LGW11:55 amLondon Gatwick
10h 55m
1 stop
BOS5:50 pmBoston Logan Intl
Feb 26
BOS7:50 pmBoston Logan Intl
10h 05m
1 stop
LGW10:55 amLondon Gatwick
$501
Icelandair
Jan 17
LHR12:15 pmLondon Heathrow
10h 35m
1 stop
BOS5:50 pmBoston Logan Intl
Jan 20
BOS7:50 pmBoston Logan Intl
18h 40m
1 stop
LHR7:30 pmLondon Heathrow
$504
Icelandair
Mar 1
LGW11:55 amLondon Gatwick
10h 55m
1 stop
BOS5:50 pmBoston Logan Intl
Mar 11
BOS12:35 pmBoston Logan Intl
18h 20m
1 stop
LGW10:55 amLondon Gatwick
$505

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated January 16, 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

Mon 3/9

1:30 pm-5:10 pm

Nonstop7h 40m

Boston Logan Intl

Mon 3/23

8:10 pm-7:00 am

Nonstop6h 50m

$500

LondonBoston

STN - BOS

STNBOS

London Stansted

Sat 2/14

1:30 pm-6:59 pm

1 stop10h 29m

Boston Logan Intl

Sun 2/22

9:15 pm-2:50 pm

1 stop12h 35m

$501

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Mon 2/23

11:55 am-5:50 pm

1 stop10h 55m

Boston Logan Intl

Thu 2/26

7:50 pm-10:55 am

1 stop10h 05m

$501

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sun 3/1

9:00 am-5:50 pm

1 stop13h 50m

Boston Logan Intl

Sun 3/8

10:15 am-6:30 am

2 stops16h 15m

$501

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 1/27

1:30 pm-4:15 pm

Nonstop7h 45m

Boston Logan Intl

Wed 2/4

5:20 pm-12:00 pm

1 stop13h 40m

$502

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 2/4

11:45 am-7:50 pm

1 stop13h 05m

Boston Logan Intl

Wed 2/11

12:16 pm-10:50 am

2 stops17h 34m

$502

LondonBoston

LTN - BOS

LTNBOS

London Luton

Sat 2/14

12:25 pm-6:59 pm

1 stop11h 34m

Boston Logan Intl

Sun 2/22

9:15 pm-11:45 am

1 stop9h 30m

$502

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Sun 3/1

11:55 am-5:50 pm

1 stop10h 55m

Boston Logan Intl

Wed 3/11

12:35 pm-10:55 am

1 stop18h 20m

$505

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 2/25

7:30 am-10:48 pm

2 stops20h 18m

Boston Logan Intl

Sat 2/28

5:53 pm-10:10 pm

1 stop23h 17m

$505

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 5/13

5:35 pm-8:05 pm

Nonstop7h 30m

Boston Logan Intl

Wed 5/20

8:15 pm-8:00 am

Nonstop6h 45m

$507

Flights are sorted by cheapest round-trip 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 $525. If you aren’t able to travel during the month of September, then book flights to Boston from London during February instead. Flights to Boston in February, while not as cheap as those in September, still average around $537.

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 $696. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Saturday is $783.

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 $700. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Boston, so prices are often more expensive at around $807 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 $627 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from London for as low as $566 on momondo.

What cabin class options are available on London to Boston Logan Intl flights?

There are 4 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 38% 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 107% 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 round-trip 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

$479

Fastest flight time

7h 20m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from London in the past 72 hours is $479. The best round-trip flight deal from London to Boston found on momondo in the last 72 hours is $675.
The fastest flight from London to Boston takes 7h 20m
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?

    A flight from London to Boston Logan Intl will travel around 3269.0 mi. By plane, this route typically takes 7h 20m.

  • 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 are updated daily.

  • How many operators does momondo search for flights from London to Boston Logan Intl Airport?

  • How old do you have to be to fly from London to Boston Logan Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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 license, 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?

  • What is the most popular airline from London to Boston?

Best airlines flying from London to Boston

Compare and see reviews for airlines that fly from London to Boston with momondo
Airline
Rating
Free Cancellation
Price
FinnairPriceFrom $404Free CancellationRating
7.6
1,349 reviews
Search Finnair flights
IcelandairPriceFrom $454Free CancellationRating
7.1
596 reviews
Search Icelandair flights
JetBluePriceFrom $456Free CancellationRating
7.2
2,886 reviews
Search JetBlue flights
British AirwaysPriceFrom $465Free CancellationRating
6.7
7,680 reviews
Search British Airways flights
DeltaPriceFrom $481Free CancellationRating
7.9
8,050 reviews
Search Delta flights
American AirlinesPriceFrom $486Free CancellationRating
7.2
11,136 reviews
Search American Airlines flights
IberiaPriceFrom $539Free CancellationRating
7.0
3,087 reviews
Search Iberia flights
Air FrancePriceFrom $548Free CancellationRating
7.4
1,522 reviews
Search Air France flights
Virgin AtlanticPriceFrom $551Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
  • Delta Flights From London to Boston

    Delta flight deals from London to Boston start from $481 round-trip. Over the 14 Delta flights for this route in a normal week, average airfare is usually $772 round-trip - but some users have found much cheaper deals with momondo.

  • Finnair Flights From London to Boston

    Finnair is also a popular choice for this route. Finnair flight deals for London to Boston start from as low as $404 round-trip, depending on your selected dates, with average Finnair deals seen on momondo around $696. Finnair operates 19 flights to Boston from London in an average week. Users have rated it 7.6/10 across 1,349 reviews.

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Salem
Ogunquit
Old Orchard Beach
Hampton
York Beach
Plymouth
Kennebunkport
South Yarmouth
Cambridge
Narragansett
Gloucester
Falmouth
Nashua
Laconia
Brockton
Sturbridge
Everett
Chatham
Concord

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?

Yes. momondo allows you to filter the results for London to Boston flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Boston?

Once you have performed a search for London to Boston flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Boston right now. Can momondo alert me if prices change?

Price alerts on flights to Boston from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Boston trip

We make it super easy to schedule, organize 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
Sun 2/15
Sun 2/22

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