Cheap flights from London to Boston from £326

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 23/2. 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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TAP AIR PORTUGAL Logo
18:30 - 14:35
LHR
-
BOS
25h 05m1 stop
TAP AIR PORTUGAL Logo
18:05 - 22:40
BOS
-
LHR
23h 35m1 stop
£424TAP AIR PORTUGAL
Thu, 18 Dec - Sun, 18 Jan
Icelandair Logo
15:40 - 18:50
LGW
-
BOS
32h 10m1 stop
Icelandair Logo
23:30 - 14:40
BOS
-
LGW
10h 10m1 stop
£424Icelandair
Fri, 10 Apr - Wed, 15 Apr
Multiple Airlines Logo
09:00 - 19:42
LHR
-
BOS
15h 42m2 stops
Multiple Airlines Logo
15:35 - 10:05
BOS
-
LHR
14h 30m2 stops
£425Multiple Airlines
Wed, 18 Feb - Thu, 12 Mar
TAP AIR PORTUGAL Logo
21:25 - 20:10
LGW
-
BOS
27h 45m2 stops
TAP AIR PORTUGAL Logo
22:25 - 09:50
BOS
-
LGW
30h 25m1 stop
£425TAP AIR PORTUGAL
Fri, 6 Feb - Sat, 14 Feb
Multiple Airlines Logo
21:20 - 20:55
STN
-
BOS
28h 35m1 stop
Multiple Airlines Logo
22:40 - 16:55
BOS
-
STN
13h 15m1 stop
£425Multiple Airlines
Mon, 26 Jan - Mon, 2 Feb
Finnair Logo
10:15 - 18:13
LHR
-
BOS
12h 58m1 stop
Finnair Logo
18:55 - 06:30
BOS
-
LHR
6h 35mdirect
£427Finnair
Thu, 5 Feb - Sun, 8 Feb
Air Canada Logo
06:50 - 14:52
LHR
-
BOS
13h 02m2 stops
Air Canada Logo
10:45 - 08:30
BOS
-
LHR
16h 45m1 stop
£428Air Canada
Wed, 14 Jan - Tue, 27 Jan
Virgin Atlantic Logo
20:00 - 11:15
LHR
-
BOS
20h 15m1 stop
Virgin Atlantic Logo
20:50 - 20:10
BOS
-
LHR
18h 20m1 stop
£428Virgin Atlantic
Wed, 7 Jan - Mon, 12 Jan
Iberia Logo
07:30 - 15:15
LHR
-
BOS
12h 45m1 stop
Iberia Logo
19:15 - 07:00
BOS
-
LHR
6h 45mdirect
£429Iberia
Sun, 1 Feb - Fri, 27 Feb
Finnair Logo
12:20 - 19:50
LHR
-
BOS
12h 30m1 stop
Finnair Logo
20:20 - 07:50
BOS
-
LHR
6h 30mdirect
£431Finnair
Wed, 13 May - Wed, 20 May

United Airlines flights from London to Boston

Our best United Airlines deals on London to Boston flight tickets
United Airlines
5 May
LHR13:45London Heathrow
11h 10m
1 stop
BOS19:55Boston Logan Intl
12 May
BOS06:00Boston Logan Intl
19h 55m
1 stop
LHR06:55London Heathrow
United Airlines
4 May
LHR07:25London Heathrow
15h 15m
1 stop
BOS17:40Boston Logan Intl
13 May
BOS06:00Boston Logan Intl
19h 55m
1 stop
LHR06:55London Heathrow
United Airlines
22 Jan
LHR09:00London Heathrow
16h 20m
1 stop
BOS20:20Boston Logan Intl
29 Jan
BOS14:20Boston Logan Intl
13h 05m
2 stops
LHR08:25London Heathrow

Finnair flights from London to Boston

Our best Finnair deals on London to Boston flight tickets
Finnair
5 Feb
LHR10:15London Heathrow
12h 58m
1 stop
BOS18:13Boston Logan Intl
8 Feb
BOS18:55Boston Logan Intl
6h 35m
LHR06:30London Heathrow
Finnair
13 May
LHR12:20London Heathrow
12h 30m
1 stop
BOS19:50Boston Logan Intl
20 May
BOS20:20Boston Logan Intl
6h 30m
LHR07:50London Heathrow
Finnair
17 Feb
LHR13:30London Heathrow
7h 35m
BOS16:05Boston Logan Intl
24 Feb
BOS19:15Boston Logan Intl
6h 45m
LHR07:00London 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 9 December 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

Thu 18/12

18:30-14:35

1 stop25h 05m

Boston Logan Intl

Sun 18/1

18:05-22:40

1 stop23h 35m

£424

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Fri 10/4

15:40-18:50

1 stop32h 10m

Boston Logan Intl

Wed 15/4

23:30-14:40

1 stop10h 10m

£424

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 18/2

09:00-19:42

2 stops15h 42m

Boston Logan Intl

Thu 12/3

15:35-10:05

2 stops14h 30m

£425

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Fri 6/2

21:25-20:10

2 stops27h 45m

Boston Logan Intl

Sat 14/2

22:25-09:50

1 stop30h 25m

£425

LondonBoston

STN - BOS

STNBOS

London Stansted

Mon 26/1

21:20-20:55

1 stop28h 35m

Boston Logan Intl

Mon 2/2

22:40-16:55

1 stop13h 15m

£425

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 5/2

10:15-18:13

1 stop12h 58m

Boston Logan Intl

Sun 8/2

18:55-06:30

Nonstop6h 35m

£427

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 14/1

06:50-14:52

2 stops13h 02m

Boston Logan Intl

Tue 27/1

10:45-08:30

1 stop16h 45m

£428

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 7/1

20:00-11:15

1 stop20h 15m

Boston Logan Intl

Mon 12/1

20:50-20:10

1 stop18h 20m

£428

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sun 1/2

07:30-15:15

1 stop12h 45m

Boston Logan Intl

Fri 27/2

19:15-07:00

Nonstop6h 45m

£429

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 13/5

12:20-19:50

1 stop12h 30m

Boston Logan Intl

Wed 20/5

20:20-07:50

Nonstop6h 30m

£431

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 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 £395. The month of February is another great option to travel to Boston, with average flight prices from London averaging around £399.

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 £507. 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 £580. 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 £497. In the evening is when there is more demand to fly to Boston, so prices are often more expensive at around £690 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 £465 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 £427 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 December 2025, prices for London to Boston flights are approximately 30% 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

£413

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 £413. The best return flight deal from London to Boston found on momondo in the last 72 hours is £484.
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. 7h 30m 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 £251Free CancellationRating
7.0
103 reviews
Search PLAY flights
TAP AIR PORTUGALPriceFrom £281Free CancellationRating
7.1
2,085 reviews
Search TAP AIR PORTUGAL flights
DeltaPriceFrom £298Free CancellationRating
7.9
8,009 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom £299Free CancellationRating
7.4
1,602 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom £305Free CancellationRating
7.0
588 reviews
Search Icelandair flights
LufthansaPriceFrom £306Free CancellationRating
6.8
7,618 reviews
Search Lufthansa flights
JetBluePriceFrom £330Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
United AirlinesPriceFrom £335Free CancellationRating
7.4
9,088 reviews
Search United Airlines flights
British AirwaysPriceFrom £339Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
Air CanadaPriceFrom £344Free CancellationRating
7.1
10,514 reviews
Search Air Canada 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 £298 round-trip, up to an average price of £537. Our users have rated Delta at 7.9/10.

  • KLM Flights From London to Boston

    KLM (7.7/10 from 1,431 reviews) operates around 13 flights from London to Boston in any given week. The average KLM airfare for this route is around £432, with deals from around £358 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
Randolph
Braintree
Revere
York Beach
Needham
Somerville
Cape Neddick
Concord
Old Orchard Beach
Sandwich
Everett
Hampton
Hull

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
Thu 8/1
Thu 15/1

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