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Cheap flights from London to Boston from $391

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 4/17. 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.
Iberia Logo
10:50 am - 7:50 pm
LHR
-
BOS
14h 00m
1 stop
Iberia Logo
9:20 pm - 2:55 pm
BOS
-
LHR
12h 35m
1 stop
$472Iberia
Wed, Jul 1 - Sat, Jul 11
Icelandair Logo
1:05 pm - 6:50 pm
LHR
-
BOS
10h 45m
1 stop
Icelandair Logo
8:50 pm - 8:20 pm
BOS
-
LHR
18h 30m
1 stop
$473Icelandair
Thu, May 7 - Sun, May 10
TAP AIR PORTUGAL Logo
12:05 pm - 8:45 pm
LGW
-
BOS
13h 40m
1 stop
TAP AIR PORTUGAL Logo
11:15 pm - 8:25 pm
BOS
-
LGW
16h 10m
1 stop
$473TAP AIR PORTUGAL
Mon, May 4 - Mon, May 11
Finnair Logo
10:20 am - 10:48 pm
LHR
-
BOS
17h 28m
2 stops
Finnair Logo
10:35 pm - 9:15 am
BOS
-
LHR
6h 40mnonstop
$474Finnair
Fri, Feb 27 - Mon, Mar 9
TAP AIR PORTUGAL Logo
10:40 am - 9:10 pm
LGW
-
BOS
14h 30m
1 stop
TAP AIR PORTUGAL Logo
7:05 pm - 9:50 am
BOS
-
LGW
10h 45m
1 stop
$474TAP AIR PORTUGAL
Thu, Mar 19 - Sun, Mar 22
British Airways Logo
5:05 pm - 7:45 pm
LHR
-
BOS
7h 40mnonstop
British Airways Logo
7:30 am - 7:00 pm
BOS
-
LHR
6h 30mnonstop
$475British Airways
Fri, Feb 20 - Tue, Feb 24
American Airlines Logo
12:30 pm - 7:30 pm
LHR
-
BOS
12h 00m
1 stop
American Airlines Logo
12:00 pm - 7:20 am
BOS
-
LHR
14h 20m
1 stop
$477American Airlines
Tue, May 19 - Wed, May 27
Finnair Logo
10:20 am - 10:48 pm
LHR
-
BOS
17h 28m
2 stops
Finnair Logo
2:12 pm - 7:20 am
BOS
-
LHR
12h 08m
1 stop
$478Finnair
Tue, Feb 24 - Sun, Mar 1
Virgin Atlantic Logo
7:45 am - 1:25 pm
LCY
-
BOS
10h 40m
1 stop
Virgin Atlantic Logo
7:10 pm - 9:30 am
BOS
-
LCY
9h 20m
1 stop
$555Virgin Atlantic
Thu, Feb 19 - Tue, Feb 24
Virgin Atlantic Logo
5:05 pm - 7:55 pm
LCY
-
BOS
30h 50m
1 stop
Virgin Atlantic Logo
9:50 pm - 5:20 pm
BOS
-
LCY
15h 30m
1 stop
$556Virgin Atlantic
Tue, Mar 17 - Sun, Mar 22

Iberia flights from London to Boston

Our best Iberia deals on London to Boston flight tickets
Iberia
Jul 1
LHR10:50 amLondon Heathrow
14h 00m
1 stop
BOS7:50 pmBoston Logan Intl
Jul 11
BOS9:20 pmBoston Logan Intl
12h 35m
1 stop
LHR2:55 pmLondon Heathrow
$472
Iberia
Feb 4
LHR11:25 amLondon Heathrow
13h 25m
1 stop
BOS7:50 pmBoston Logan Intl
Feb 10
BOS3:35 pmBoston Logan Intl
9h 45m
1 stop
LHR6:20 amLondon Heathrow
$475
Iberia
Feb 10
LHR11:25 amLondon Heathrow
16h 31m
2 stops
BOS10:56 pmBoston Logan Intl
Feb 17
BOS3:49 pmBoston Logan Intl
9h 31m
1 stop
LHR6:20 amLondon Heathrow
$478

American Airlines flights from London to Boston

Our best American Airlines deals on London to Boston flight tickets
American Airlines
May 19
LHR2:10 pmLondon Heathrow
14h 42m
1 stop
BOS11:52 pmBoston Logan Intl
May 26
BOS12:00 pmBoston Logan Intl
13h 25m
1 stop
LHR6:25 amLondon Heathrow
$477
American Airlines
Feb 16
LHR1:30 pmLondon Heathrow
7h 45m
BOS4:15 pmBoston Logan Intl
Feb 22
BOS4:09 pmBoston Logan Intl
10h 41m
1 stop
LHR7:50 amLondon Heathrow
$504
American Airlines
Feb 7
LHR10:15 amLondon Heathrow
11h 51m
1 stop
BOS5:06 pmBoston Logan Intl
Feb 14
BOS6:00 amBoston Logan Intl
9h 00m
1 stop
LHR8:00 pmLondon Heathrow
$510

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 February 3, 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

Wed 7/1

10:50 am-7:50 pm

1 stop14h 00m

Boston Logan Intl

Sat 7/11

9:20 pm-2:55 pm

1 stop12h 35m

$472

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 5/7

1:05 pm-6:50 pm

1 stop10h 45m

Boston Logan Intl

Sun 5/10

8:50 pm-8:20 pm

1 stop18h 30m

$473

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Mon 5/4

12:05 pm-8:45 pm

1 stop13h 40m

Boston Logan Intl

Mon 5/11

11:15 pm-8:25 pm

1 stop16h 10m

$473

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Fri 2/27

10:20 am-10:48 pm

2 stops17h 28m

Boston Logan Intl

Mon 3/9

10:35 pm-9:15 am

Nonstop6h 40m

$474

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Thu 3/19

10:40 am-9:10 pm

1 stop14h 30m

Boston Logan Intl

Sun 3/22

7:05 pm-9:50 am

1 stop10h 45m

$474

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Fri 2/20

5:05 pm-7:45 pm

Nonstop7h 40m

Boston Logan Intl

Tue 2/24

7:30 am-7:00 pm

Nonstop6h 30m

$475

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 5/19

12:30 pm-7:30 pm

1 stop12h 00m

Boston Logan Intl

Wed 5/27

12:00 pm-7:20 am

1 stop14h 20m

$477

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 2/24

10:20 am-10:48 pm

2 stops17h 28m

Boston Logan Intl

Sun 3/1

2:12 pm-7:20 am

1 stop12h 08m

$478

LondonBoston

LCY - BOS

LCYBOS

London City

Thu 2/19

7:45 am-1:25 pm

1 stop10h 40m

Boston Logan Intl

Tue 2/24

7:10 pm-9:30 am

1 stop9h 20m

$555

LondonBoston

LCY - BOS

LCYBOS

London City

Tue 3/17

5:05 pm-7:55 pm

1 stop30h 50m

Boston Logan Intl

Sun 3/22

9:50 pm-5:20 pm

1 stop15h 30m

$556

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 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 $528.

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 $698. 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 $786.

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 $705. 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 $784 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 $629 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 $567 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 February 2026, prices for London to Boston flights are approximately 52% 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

$487

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 $487. The best round-trip flight deal from London to Boston found on momondo in the last 72 hours is $621.
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).
Search flight deals

  • 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
IcelandairPriceFrom $401Free CancellationRating
7.1
606 reviews
Search Icelandair flights
United AirlinesPriceFrom $435Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
FinnairPriceFrom $452Free CancellationRating
7.6
1,357 reviews
Search Finnair flights
JetBluePriceFrom $456Free CancellationRating
7.2
2,893 reviews
Search JetBlue flights
British AirwaysPriceFrom $465Free CancellationRating
6.7
7,714 reviews
Search British Airways flights
DeltaPriceFrom $481Free CancellationRating
7.9
8,141 reviews
Search Delta flights
American AirlinesPriceFrom $486Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights
IberiaPriceFrom $539Free CancellationRating
7.0
3,104 reviews
Search Iberia flights
Air FrancePriceFrom $548Free CancellationRating
7.4
1,531 reviews
Search Air France flights
Virgin AtlanticPriceFrom $574Free 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 13 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 $452 round-trip, depending on your selected dates, with average Finnair deals seen on momondo around $746. Finnair operates 26 flights to Boston from London in an average week. Users have rated it 7.6/10 across 1,357 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
Kennebunkport
Plymouth
Cambridge
South Yarmouth
Narragansett
Gloucester
Falmouth
Nashua
Brockton
Laconia
Warwick
Sturbridge
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.
Start using Trips
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