Cheap flights from London to Boston from £189

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 3/11. 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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Cheap return flights

SWISS Logo
17:10 - 15:25LHR-BOS
27h 15m1 stop
SWISS Logo
21:50 - 21:40BOS-LHR
18h 50m1 stop
£252SWISS
Find Deal
Wed, 22 Oct - Thu, 27 Nov
SWISS Logo
17:10 - 15:25LHR-BOS
27h 15m1 stop
SWISS Logo
17:05 - 17:50BOS-LHR
19h 45m1 stop
£266SWISS
Find Deal
Wed, 24 Sep - Mon, 29 Sep
TAP AIR PORTUGAL Logo
12:05 - 20:45LGW-BOS
13h 40m1 stop
TAP AIR PORTUGAL Logo
18:10 - 14:00BOS-LGW
14h 50m1 stop
£318TAP AIR PORTUGAL
Find Deal
Wed, 15 Oct - Wed, 22 Oct
TAP AIR PORTUGAL Logo
21:15 - 20:20LGW-BOS
28h 05m1 stop
TAP AIR PORTUGAL Logo
18:10 - 15:35BOS-LGW
16h 25m1 stop
£318TAP AIR PORTUGAL
Find Deal
Fri, 3 Oct - Mon, 6 Oct
Icelandair Logo
11:55 - 17:50LGW-BOS
10h 55m1 stop
Icelandair Logo
19:50 - 10:55BOS-LGW
10h 05m1 stop
£322Icelandair
Find Deal
Wed, 3 Dec - Wed, 10 Dec
Icelandair Logo
11:55 - 17:50LGW-BOS
10h 55m1 stop
Icelandair Logo
19:50 - 10:55BOS-LGW
10h 05m1 stop
£324Icelandair
Find Deal
Wed, 3 Dec - Wed, 10 Dec
Virgin Atlantic Logo
14:45 - 18:25LHR-BOS
32h 40m1 stop
Virgin Atlantic Logo
22:45 - 10:30BOS-LHR
6h 45mdirect
£359Virgin Atlantic
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Mon, 1 Sep - Thu, 25 Sep
PLAY Logo
11:40 - 17:50STN-BOS
11h 10m1 stop
PLAY Logo
19:15 - 10:40BOS-STN
10h 25m1 stop
£368PLAY
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Wed, 3 Sep - Wed, 10 Sep
PLAY Logo
11:40 - 17:50STN-BOS
11h 10m1 stop
PLAY Logo
19:15 - 10:40BOS-STN
10h 25m1 stop
£370PLAY
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Wed, 3 Sep - Wed, 10 Sep
Virgin Atlantic Logo
10:00 - 18:25LCY-BOS
13h 25m1 stop
Virgin Atlantic Logo
20:15 - 16:40BOS-LCY
15h 25m1 stop
£406Virgin Atlantic
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Tue, 2 Sep - Wed, 24 Sep

Air Canada flights from London to Boston

Our best Air Canada deals on London to Boston flight tickets
Air Canada
3 Sept
LHR06:50London Heathrow
12h 40m
2 stops
BOS14:30Boston Logan Intl
23 Sept
BOS18:30Boston Logan Intl
10h 05m
1 stop
LHR09:35London Heathrow
Air Canada
3 Sept
LHR06:50London Heathrow
12h 40m
2 stops
BOS14:30Boston Logan Intl
23 Sept
BOS10:40Boston Logan Intl
14h 50m
2 stops
LHR06:30London Heathrow
Air Canada
27 Aug
LHR17:40London Heathrow
20h 50m
2 stops
BOS09:30Boston Logan Intl
1 Sept
BOS18:40Boston Logan Intl
30h 50m
1 stop
LHR06:30London Heathrow

Icelandair flights from London to Boston

Our best Icelandair deals on London to Boston flight tickets
Icelandair
3 Dec
LGW11:55London Gatwick
10h 55m
1 stop
BOS17:50Boston Logan Intl
10 Dec
BOS19:50Boston Logan Intl
10h 05m
1 stop
LGW10:55London Gatwick
Icelandair
3 Dec
LGW11:55London Gatwick
10h 55m
1 stop
BOS17:50Boston Logan Intl
10 Dec
BOS19:50Boston Logan Intl
10h 05m
1 stop
LGW10:55London Gatwick
Icelandair
14 Nov
LGW11:55London Gatwick
10h 55m
1 stop
BOS17:50Boston Logan Intl
17 Nov
BOS19:50Boston Logan Intl
10h 05m
1 stop
LGW10:55London Gatwick

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 13 August 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

Wed 22/10

17:10-15:25

1 stop27h 15m

Boston Logan Intl

Thu 27/11

21:50-21:40

1 stop18h 50m

£252

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 24/9

17:10-15:25

1 stop27h 15m

Boston Logan Intl

Mon 29/9

17:05-17:50

1 stop19h 45m

£266

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 15/10

12:05-20:45

1 stop13h 40m

Boston Logan Intl

Wed 22/10

18:10-14:00

1 stop14h 50m

£318

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Fri 3/10

21:15-20:20

1 stop28h 05m

Boston Logan Intl

Mon 6/10

18:10-15:35

1 stop16h 25m

£318

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 3/12

11:55-17:50

1 stop10h 55m

Boston Logan Intl

Wed 10/12

19:50-10:55

1 stop10h 05m

£322

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 3/12

11:55-17:50

1 stop10h 55m

Boston Logan Intl

Wed 10/12

19:50-10:55

1 stop10h 05m

£324

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 1/9

14:45-18:25

1 stop32h 40m

Boston Logan Intl

Thu 25/9

22:45-10:30

Nonstop6h 45m

£359

LondonBoston

STN - BOS

STNBOS

London Stansted

Wed 3/9

11:40-17:50

1 stop11h 10m

Boston Logan Intl

Wed 10/9

19:15-10:40

1 stop10h 25m

£368

LondonBoston

STN - BOS

STNBOS

London Stansted

Wed 3/9

11:40-17:50

1 stop11h 10m

Boston Logan Intl

Wed 10/9

19:15-10:40

1 stop10h 25m

£370

LondonBoston

LCY - BOS

LCYBOS

London City

Tue 2/9

10:00-18:25

1 stop13h 25m

Boston Logan Intl

Wed 24/9

20:15-16:40

1 stop15h 25m

£406

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 £390. The month of February is another great option to travel to Boston, with average flight prices from London averaging around £396.

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 £483. 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 £583. 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 in the afternoon. Flights from London to Boston during this time can be as low as £488. 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 Gatwick 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 £460 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 £422 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 31% 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 August 2025, prices for London to Boston flights are approximately 20% cheaper 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
  • How far is London to Boston Logan Intl by plane?

    The distance between London and Boston Logan Intl is about 3269.0 mi. 9h 40m 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
Aer LingusPriceFrom £7Free CancellationRating
7.1
1,210 reviews
Search Aer Lingus flights
PLAYPriceFrom £261Free CancellationRating
7.0
103 reviews
Search PLAY flights
TAP AIR PORTUGALPriceFrom £282Free CancellationRating
7.1
1,945 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom £303Free CancellationRating
7.0
526 reviews
Search Icelandair flights
LufthansaPriceFrom £304Free CancellationRating
6.8
7,317 reviews
Search Lufthansa flights
Scandinavian AirlinesPriceFrom £306Free CancellationRating
7.4
1,466 reviews
Search Scandinavian Airlines flights
British AirwaysPriceFrom £336Free CancellationRating
6.6
7,265 reviews
Search British Airways flights
United AirlinesPriceFrom £339Free CancellationRating
7.4
8,920 reviews
Search United Airlines flights
Air FrancePriceFrom £340Free CancellationRating
7.4
1,467 reviews
Search Air France flights
DeltaPriceFrom £349Free CancellationRating
8.0
7,979 reviews
Search Delta flights
  • Delta Flights From London to Boston

    Delta is one of the most popular airlines flying from London to Boston, operating 21 flights/week on average for this route. A good Delta flight deal for London to Boston starts from £470 round-trip, up to an average price of £736. Our users have rated Delta at 8.0/10.

  • KLM Flights From London to Boston

    KLM (7.8/10 from 1,381 reviews) operates around 21 flights from London to Boston in any given week. The average KLM airfare for this route is around £546, with deals from around £470 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
Cambridge
Burlington
Amherst
Plymouth
Randolph
Brookline
Braintree
Needham
Revere
Falmouth
York Beach
West Yarmouth
Somerville
Warwick
Concord
Hampton
Hull
Cape Neddick
South Portland

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

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1 adult
Mon 18/8
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