Cheap flights from London to Boston from £300

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 14/10. 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

United Airlines Logo
06:30 - 13:25LHR-BOS
11h 55m1 stop
United Airlines Logo
15:40 - 07:10BOS-LHR
10h 30m1 stop
£333United Airlines
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Fri, 28 Nov - Sun, 30 Nov
United Airlines Logo
13:45 - 19:55LHR-BOS
11h 10m1 stop
United Airlines Logo
12:15 - 06:30BOS-LHR
13h 15m2 stops
£334United Airlines
Find Deal
Thu, 2 Oct - Thu, 16 Oct
Icelandair Logo
08:25 - 11:27LHR-BOS
8h 02mdirect
Icelandair Logo
18:13 - 06:30BOS-LHR
7h 17mdirect
£335Icelandair
Find Deal
Wed, 1 Oct - Fri, 10 Oct
Virgin Atlantic Logo
12:45 - 15:40LHR-BOS
7h 55mdirect
Virgin Atlantic Logo
20:15 - 08:05BOS-LHR
6h 50mdirect
£337Virgin Atlantic
Find Deal
Tue, 30 Sep - Tue, 14 Oct
British Airways Logo
15:05 - 22:19LGW-BOS
12h 14m1 stop
British Airways Logo
17:50 - 10:50BOS-LGW
13h 00m1 stop
£349British Airways
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Wed, 22 Oct - Tue, 28 Oct
British Airways Logo
15:05 - 17:15LGW-BOS
31h 10m1 stop
British Airways Logo
15:00 - 08:10BOS-LGW
12h 10m1 stop
£354British Airways
Find Deal
Thu, 9 Oct - Tue, 14 Oct
Virgin Atlantic Logo
09:40 - 12:25LHR-BOS
7h 45mdirect
Virgin Atlantic Logo
13:05 - 08:45BOS-LHR
15h 40m1 stop
£358Virgin Atlantic
Find Deal
Wed, 22 Oct - Tue, 28 Oct
KLM Logo
06:30 - 13:20LHR-BOS
11h 50m1 stop
KLM Logo
20:10 - 06:50BOS-LHR
6h 40mdirect
£358KLM
Find Deal
Tue, 3 Mar - Mon, 9 Mar
Icelandair Logo
08:25 - 11:22LHR-BOS
7h 57mdirect
Icelandair Logo
20:15 - 20:45BOS-LHR
19h 30m1 stop
£366Icelandair
Find Deal
Thu, 9 Oct - Mon, 13 Oct
KLM Logo
07:45 - 13:40LCY-BOS
10h 55m1 stop
KLM Logo
16:50 - 07:15BOS-LCY
9h 25m1 stop
£386KLM
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Mon, 6 Oct - Mon, 13 Oct

SWISS flights from London to Boston

Our best SWISS deals on London to Boston flight tickets
SWISS
5 Nov
LCY13:30London City
11h 50m
1 stop
BOS20:20Boston Logan Intl
9 Nov
BOS21:50Boston Logan Intl
10h 00m
1 stop
LCY12:50London City
SWISS
24 Sept
LGW18:35London Gatwick
25h 50m
1 stop
BOS15:25Boston Logan Intl
29 Sept
BOS21:40Boston Logan Intl
15h 10m
1 stop
LGW17:50London Gatwick
SWISS
14 Oct
LCY09:25London City
11h 00m
1 stop
BOS15:25Boston Logan Intl
21 Oct
BOS17:05Boston Logan Intl
10h 45m
1 stop
LCY08:50London City

Virgin Atlantic flights from London to Boston

Our best Virgin Atlantic deals on London to Boston flight tickets
Virgin Atlantic
30 Sept
LHR12:45London Heathrow
7h 55m
BOS15:40Boston Logan Intl
14 Oct
BOS20:15Boston Logan Intl
6h 50m
LHR08:05London Heathrow
Virgin Atlantic
22 Sept
LHR12:45London Heathrow
7h 55m
BOS15:40Boston Logan Intl
29 Sept
BOS22:45Boston Logan Intl
6h 45m
LHR10:30London Heathrow
Virgin Atlantic
22 Sept
LHR18:15London Heathrow
7h 45m
BOS21:00Boston Logan Intl
29 Sept
BOS20:15Boston Logan Intl
6h 50m
LHR08:05London Heathrow

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 16 September 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

Fri 28/11

06:30-13:25

1 stop11h 55m

Boston Logan Intl

Sun 30/11

15:40-07:10

1 stop10h 30m

£333

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 2/10

13:45-19:55

1 stop11h 10m

Boston Logan Intl

Thu 16/10

12:15-06:30

2 stops13h 15m

£334

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 1/10

08:25-11:27

Nonstop8h 02m

Boston Logan Intl

Fri 10/10

18:13-06:30

Nonstop7h 17m

£335

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 30/9

12:45-15:40

Nonstop7h 55m

Boston Logan Intl

Tue 14/10

20:15-08:05

Nonstop6h 50m

£337

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 22/10

15:05-22:19

1 stop12h 14m

Boston Logan Intl

Tue 28/10

17:50-10:50

1 stop13h 00m

£349

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Thu 9/10

15:05-17:15

1 stop31h 10m

Boston Logan Intl

Tue 14/10

15:00-08:10

1 stop12h 10m

£354

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 22/10

09:40-12:25

Nonstop7h 45m

Boston Logan Intl

Tue 28/10

13:05-08:45

1 stop15h 40m

£358

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 3/3

06:30-13:20

1 stop11h 50m

Boston Logan Intl

Mon 9/3

20:10-06:50

Nonstop6h 40m

£358

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 9/10

08:25-11:22

Nonstop7h 57m

Boston Logan Intl

Mon 13/10

20:15-20:45

1 stop19h 30m

£366

LondonBoston

LCY - BOS

LCYBOS

London City

Mon 6/10

07:45-13:40

1 stop10h 55m

Boston Logan Intl

Mon 13/10

16:50-07:15

1 stop9h 25m

£386

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

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 £488. 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 £581. 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 £487. In the evening is when there is more demand to fly to Boston, so prices are often more expensive at around £692 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 £454 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 £413 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 20% 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 September 2025, prices for London to Boston flights are approximately 54% 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

£340

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 £340. The best return flight deal from London to Boston found on momondo in the last 72 hours is £397.
The fastest flight from London to Boston takes 7h 20m
Direct flights go from London to Boston every day.
There is 1 airport near Boston: 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 25m 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
7.2
1,274 reviews
Search Aer Lingus flights
PLAYPriceFrom £247Free CancellationRating
7.0
103 reviews
Search PLAY flights
TAP AIR PORTUGALPriceFrom £279Free CancellationRating
7.1
1,975 reviews
Search TAP AIR PORTUGAL flights
Austrian AirlinesPriceFrom £286Free CancellationRating
7.6
850 reviews
Search Austrian Airlines flights
Scandinavian AirlinesPriceFrom £296Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom £299Free CancellationRating
7.0
544 reviews
Search Icelandair flights
LufthansaPriceFrom £300Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
British AirwaysPriceFrom £333Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
United AirlinesPriceFrom £336Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
JetBluePriceFrom £336Free CancellationRating
7.2
2,912 reviews
Search JetBlue flights
  • Delta Flights From London to Boston

    Delta is one of the most popular airlines flying from London to Boston, operating 19 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 £708. Our users have rated Delta at 7.9/10.

  • KLM Flights From London to Boston

    KLM (7.8/10 from 1,385 reviews) operates around 19 flights from London to Boston in any given week. The average KLM airfare for this route is around £547, with deals from around £476 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
Falmouth
Plymouth
Braintree
Randolph
Brookline
Needham
Revere
York Beach
West Yarmouth
Somerville
Warwick
Concord
Hampton
Hull
Cape Neddick
Old Orchard Beach

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
Thu 16/10
Thu 23/10

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