Cheap flights from London to Boston from £309

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 25/1. 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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Icelandair Logo
20:35 - 17:50LHR-BOS
26h 15m1 stop
Icelandair Logo
19:50 - 10:50BOS-LHR
10h 00m1 stop
£344Icelandair
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Tue, 10 Feb - Fri, 20 Feb
TAP AIR PORTUGAL Logo
12:25 - 21:10LHR-BOS
12h 45m1 stop
TAP AIR PORTUGAL Logo
19:05 - 17:30BOS-LHR
18h 25m1 stop
£345TAP AIR PORTUGAL
Find Deal
Thu, 12 Mar - Thu, 19 Mar
TAP AIR PORTUGAL Logo
10:40 - 20:10LGW-BOS
14h 30m1 stop
TAP AIR PORTUGAL Logo
18:05 - 09:50BOS-LGW
10h 45m1 stop
£345TAP AIR PORTUGAL
Find Deal
Fri, 12 Dec - Wed, 14 Jan
TAP AIR PORTUGAL Logo
10:40 - 20:10LGW-BOS
14h 30m1 stop
TAP AIR PORTUGAL Logo
18:05 - 20:35BOS-LGW
21h 30m2 stops
£347TAP AIR PORTUGAL
Find Deal
Fri, 5 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
06:40 - 15:50LHR-BOS
14h 10m1 stop
Scandinavian Airlines Logo
17:35 - 14:35BOS-LHR
16h 00m2 stops
£381Scandinavian Airlines
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Thu, 29 Jan - Mon, 2 Feb
Scandinavian Airlines Logo
19:50 - 15:50LHR-BOS
49h 00m2 stops
Scandinavian Airlines Logo
17:35 - 21:20BOS-LHR
22h 45m2 stops
£384Scandinavian Airlines
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Tue, 10 Feb - Sun, 15 Feb
Iberia Logo
07:50 - 15:15LCY-BOS
12h 25m1 stop
Iberia Logo
16:45 - 08:50BOS-LCY
11h 05m1 stop
£480Iberia
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Thu, 4 Dec - Thu, 11 Dec
Iberia Logo
07:50 - 15:15LCY-BOS
12h 25m1 stop
Iberia Logo
16:45 - 08:50BOS-LCY
11h 05m1 stop
£481Iberia
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Thu, 4 Dec - Thu, 11 Dec
British Airways Logo
07:50 - 19:50LCY-BOS
17h 00m1 stop
British Airways Logo
15:50 - 20:00BOS-LCY
23h 10m2 stops
£490British Airways
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Wed, 10 Dec - Wed, 17 Dec
Virgin Atlantic Logo
09:20 - 18:55LCY-BOS
14h 35m1 stop
Virgin Atlantic Logo
13:05 - 07:15BOS-LCY
13h 10m2 stops
£492Virgin Atlantic
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Wed, 26 Nov - Wed, 10 Dec

SWISS flights from London to Boston

Our best SWISS deals on London to Boston flight tickets
SWISS
10 Mar
LCY13:30London City
11h 50m
1 stop
BOS21:20Boston Logan Intl
18 Mar
BOS22:50Boston Logan Intl
10h 05m
1 stop
LCY12:55London City
SWISS
13 Jan
LCY09:15London City
15h 45m
1 stop
BOS20:00Boston Logan Intl
27 Jan
BOS21:50Boston Logan Intl
14h 15m
1 stop
LCY17:05London City
SWISS
3 Dec
LCY13:30London City
11h 50m
1 stop
BOS20:20Boston Logan Intl
8 Dec
BOS22:10Boston Logan Intl
9h 45m
1 stop
LCY12:55London City

British Airways flights from London to Boston

Our best British Airways deals on London to Boston flight tickets
British Airways
13 Nov
LHR13:30London Heathrow
7h 40m
BOS16:10Boston Logan Intl
18 Nov
BOS19:25Boston Logan Intl
6h 35m
LHR07:00London Heathrow
British Airways
15 Nov
LHR13:30London Heathrow
7h 40m
BOS16:10Boston Logan Intl
28 Nov
BOS19:17Boston Logan Intl
9h 23m
1 stop
LHR09:40London Heathrow
British Airways
12 Nov
LHR13:30London Heathrow
7h 40m
BOS16:10Boston Logan Intl
17 Nov
BOS18:55Boston Logan Intl
6h 35m
LHR06:30London 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 7 November 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

Tue 10/2

20:35-17:50

1 stop26h 15m

Boston Logan Intl

Fri 20/2

19:50-10:50

1 stop10h 00m

£344

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 12/3

12:25-21:10

1 stop12h 45m

Boston Logan Intl

Thu 19/3

19:05-17:30

1 stop18h 25m

£345

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Fri 12/12

10:40-20:10

1 stop14h 30m

Boston Logan Intl

Wed 14/1

18:05-09:50

1 stop10h 45m

£345

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Fri 5/12

10:40-20:10

1 stop14h 30m

Boston Logan Intl

Mon 8/12

18:05-20:35

2 stops21h 30m

£347

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 29/1

06:40-15:50

1 stop14h 10m

Boston Logan Intl

Mon 2/2

17:35-14:35

2 stops16h 00m

£381

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 10/2

19:50-15:50

2 stops49h 00m

Boston Logan Intl

Sun 15/2

17:35-21:20

2 stops22h 45m

£384

LondonBoston

LCY - BOS

LCYBOS

London City

Thu 4/12

07:50-15:15

1 stop12h 25m

Boston Logan Intl

Thu 11/12

16:45-08:50

1 stop11h 05m

£480

LondonBoston

LCY - BOS

LCYBOS

London City

Thu 4/12

07:50-15:15

1 stop12h 25m

Boston Logan Intl

Thu 11/12

16:45-08:50

1 stop11h 05m

£481

LondonBoston

LCY - BOS

LCYBOS

London City

Wed 10/12

07:50-19:50

1 stop17h 00m

Boston Logan Intl

Wed 17/12

15:50-20:00

2 stops23h 10m

£490

LondonBoston

LCY - BOS

LCYBOS

London City

Wed 26/11

09:20-18:55

1 stop14h 35m

Boston Logan Intl

Wed 10/12

13:05-07:15

2 stops13h 10m

£492

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 £402. The month of February is another great option to travel to Boston, with average flight prices from London averaging around £406.

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 £517. 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 £598. 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 £510. In the evening is when there is more demand to fly to Boston, so prices are often more expensive at around £724 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 £474 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 £438 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?

No. A direct flight is the cheapest option for a flight between London to Boston.

How have London to Boston flight prices changed over time?

As of November 2025, prices for London to Boston flights are approximately 45% 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

£368

Fastest flight time

7h 25m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from London in the past 72 hours is £368. The best return flight deal from London to Boston found on momondo in the last 72 hours is £485.
The fastest flight from London to Boston takes 7h 25m
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. 9h 45m 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
PLAYPriceFrom £275Free CancellationRating
7.0
103 reviews
Search PLAY flights
TAP AIR PORTUGALPriceFrom £289Free CancellationRating
7.1
2,049 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom £307Free CancellationRating
7.4
1,566 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom £311Free CancellationRating
6.8
7,558 reviews
Search Lufthansa flights
IcelandairPriceFrom £311Free CancellationRating
7.1
572 reviews
Search Icelandair flights
JetBluePriceFrom £338Free CancellationRating
7.2
2,907 reviews
Search JetBlue flights
United AirlinesPriceFrom £341Free CancellationRating
7.4
9,008 reviews
Search United Airlines flights
British AirwaysPriceFrom £345Free CancellationRating
6.7
7,500 reviews
Search British Airways flights
Air CanadaPriceFrom £350Free CancellationRating
7.1
10,419 reviews
Search Air Canada flights
DeltaPriceFrom £359Free CancellationRating
7.9
8,000 reviews
Search Delta flights
  • Delta Flights From London to Boston

    Delta is one of the most popular airlines flying from London to Boston, operating 15 flights/week on average for this route. A good Delta flight deal for London to Boston starts from £359 round-trip, up to an average price of £566. Our users have rated Delta at 7.9/10.

  • KLM Flights From London to Boston

    KLM (7.7/10 from 1,408 reviews) operates around 15 flights from London to Boston in any given week. The average KLM airfare for this route is around £444, with deals from around £365 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
Falmouth
Burlington
Plymouth
Braintree
Randolph
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
Sun 7/12
Sun 14/12

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