Cheap flights from London to Boston from £293

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 12/5. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

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.
Air Canada Logo
09:00 - 19:42
LHR
-
BOS
15h 42m
2 stops
Air Canada Logo
15:35 - 07:10
BOS
-
LHR
10h 35m
1 stop
£363Air Canada
Wed, 11 Feb - Wed, 18 Feb
Multiple Airlines Logo
06:35 - 18:02
LHR
-
BOS
16h 27m
2 stops
Multiple Airlines Logo
10:15 - 07:10
BOS
-
LHR
15h 55m
1 stop
£364Multiple Airlines
Thu, 26 Feb - Wed, 4 Mar
TAP AIR PORTUGAL Logo
21:20 - 14:35
LGW
-
BOS
22h 15m
2 stops
TAP AIR PORTUGAL Logo
19:05 - 20:35
BOS
-
LGW
21h 30m
2 stops
£364TAP AIR PORTUGAL
Tue, 3 Mar - Mon, 9 Mar
TAP AIR PORTUGAL Logo
21:15 - 19:55
LGW
-
BOS
27h 40m
1 stop
TAP AIR PORTUGAL Logo
22:45 - 09:45
BOS
-
LGW
30h 00m
1 stop
£366TAP AIR PORTUGAL
Sun, 29 Mar - Sat, 4 Apr
British Airways Logo
08:50 - 13:55
LHR
-
BOS
10h 05m
1 stop
British Airways Logo
19:15 - 07:00
BOS
-
LHR
6h 45mdirect
£366British Airways
Tue, 3 Feb - Tue, 10 Feb
United Airlines Logo
07:30 - 16:22
LHR
-
BOS
13h 52m
2 stops
United Airlines Logo
17:25 - 09:20
BOS
-
LHR
10h 55m
1 stop
£368United Airlines
Fri, 17 Apr - Sun, 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
£369United Airlines
Mon, 2 Feb - Sun, 15 Feb
British Airways Logo
17:05 - 19:45
LHR
-
BOS
7h 40mdirect
British Airways Logo
15:35 - 06:15
BOS
-
LHR
9h 40m
1 stop
£370British Airways
Mon, 2 Feb - Mon, 9 Feb
Iberia Logo
11:45 - 22:56
LGW
-
BOS
16h 11m
2 stops
Iberia Logo
16:45 - 10:50
BOS
-
LGW
13h 05m
1 stop
£377Iberia
Tue, 3 Feb - Tue, 10 Feb
Iberia Logo
11:45 - 22:56
LGW
-
BOS
16h 11m
2 stops
Iberia Logo
16:45 - 19:00
BOS
-
LGW
21h 15m
1 stop
£377Iberia
Tue, 3 Feb - Tue, 10 Feb

United Airlines flights from London to Boston

Our best United Airlines deals on London to Boston flight tickets
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
£364
United Airlines
27 Jan
LHR13:25London Heathrow
11h 17m
1 stop
BOS19:42Boston Logan Intl
27 Feb
BOS06:00Boston Logan Intl
10h 20m
1 stop
LHR21:20London Heathrow
£366
United Airlines
17 Apr
LHR07:30London Heathrow
13h 52m
2 stops
BOS16:22Boston Logan Intl
19 Apr
BOS16:23Boston Logan Intl
14h 22m
1 stop
LHR11:45London Heathrow
£368

TAP AIR PORTUGAL flights from London to Boston

Our best TAP AIR PORTUGAL deals on London to Boston flight tickets
TAP AIR PORTUGAL
3 Mar
LGW21:20London Gatwick
22h 15m
2 stops
BOS14:35Boston Logan Intl
9 Mar
BOS19:05Boston Logan Intl
21h 30m
2 stops
LGW20:35London Gatwick
£364
TAP AIR PORTUGAL
29 Mar
LGW21:15London Gatwick
27h 40m
1 stop
BOS19:55Boston Logan Intl
4 Apr
BOS22:45Boston Logan Intl
30h 00m
1 stop
LGW09:45London Gatwick
£366
TAP AIR PORTUGAL
23 Apr
LGW10:35London Gatwick
15h 10m
1 stop
BOS20:45Boston Logan Intl
28 Apr
BOS18:05Boston Logan Intl
21h 20m
2 stops
LGW20:25London Gatwick
£367

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 279,928 searches. Data last updated 22 January 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 11/2

09:00-19:42

2 stops15h 42m

Boston Logan Intl

Wed 18/2

15:35-07:10

1 stop10h 35m

£363

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 26/2

06:35-18:02

2 stops16h 27m

Boston Logan Intl

Wed 4/3

10:15-07:10

1 stop15h 55m

£364

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Tue 3/3

21:20-14:35

2 stops22h 15m

Boston Logan Intl

Mon 9/3

19:05-20:35

2 stops21h 30m

£364

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Sun 29/3

21:15-19:55

1 stop27h 40m

Boston Logan Intl

Sat 4/4

22:45-09:45

1 stop30h 00m

£366

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 3/2

08:50-13:55

1 stop10h 05m

Boston Logan Intl

Tue 10/2

19:15-07:00

Nonstop6h 45m

£366

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Fri 17/4

07:30-16:22

2 stops13h 52m

Boston Logan Intl

Sun 19/4

17:25-09:20

1 stop10h 55m

£368

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 2/2

13:25-19:42

1 stop11h 17m

Boston Logan Intl

Sun 15/2

13:55-06:20

1 stop11h 25m

£369

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 2/2

17:05-19:45

Nonstop7h 40m

Boston Logan Intl

Mon 9/2

15:35-06:15

1 stop9h 40m

£370

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Tue 3/2

11:45-22:56

2 stops16h 11m

Boston Logan Intl

Tue 10/2

16:45-10:50

1 stop13h 05m

£377

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Tue 3/2

11:45-22:56

2 stops16h 11m

Boston Logan Intl

Tue 10/2

16:45-19:00

1 stop21h 15m

£377

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 £391. The month of February is another great option to travel to Boston, with average flight prices from London averaging around £398.

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart on your flight to Boston is on a Wednesday when prices can be found for as low as £511. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around £579. 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?

Our most recent data shows that the best time of day to fly to Boston is at midday. Flights from London to Boston during this time can be as low as £501. In the evening is when there is more demand to fly to Boston, so prices are often more expensive at around £681 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 £467 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 £421 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 16% 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

Best price found

£334

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 £334. The best return flight deal from London to Boston found on momondo in the last 72 hours is £444.
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?

    The distance between London and Boston Logan Intl is about 3269.0 mi. 7h 20m is a normal flight duration for this route.

  • 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 refreshed on a daily basis.

  • 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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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 required travel and health documents for your Boston Logan Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Boston Logan Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • 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
DeltaPriceFrom £147Free CancellationRating
7.9
8,088 reviews
Search Delta flights
TAP AIR PORTUGALPriceFrom £225Free CancellationRating
7.1
2,124 reviews
Search TAP AIR PORTUGAL flights
PLAYPriceFrom £268Free CancellationRating
7.0
103 reviews
Search PLAY flights
Scandinavian AirlinesPriceFrom £284Free CancellationRating
7.3
1,660 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom £300Free CancellationRating
7.1
602 reviews
Search Icelandair flights
LufthansaPriceFrom £303Free CancellationRating
6.8
7,738 reviews
Search Lufthansa flights
JetBluePriceFrom £328Free CancellationRating
7.2
2,891 reviews
Search JetBlue flights
United AirlinesPriceFrom £333Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
British AirwaysPriceFrom £337Free CancellationRating
6.7
7,690 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £351Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
  • Delta Flights From London to Boston

    Delta is one of the most popular airlines flying from London to Boston, operating 13 flights/week on average for this route. A good Delta flight deal for London to Boston starts from £147 round-trip, up to an average price of £517. Our users have rated Delta at 7.9/10.

  • KLM Flights From London to Boston

    KLM (7.7/10 from 1,442 reviews) operates around 13 flights from London to Boston in any given week. The average KLM airfare for this route is around £462, with deals from around £357 rare but found on momondo. Referenced prices are for round-trip London to Boston flight searches in the last 72 hours.

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Salem
Waltham
Cambridge
Amherst
Brookline
Falmouth
Plymouth
Burlington
Randolph
Braintree
Revere
York Beach
Needham
Cape Neddick
Old Orchard Beach
Concord
Sandwich
Everett
Hampton
Quincy

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?

Flights from London to Boston with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

If you are simply researching potential flights to Boston, momondo offers a useful price alert feature which will track prices for flights to Boston from London and alert you when they 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
Sat 21/2
Sat 28/2

Find better results for your trip to the United States