Cheap flights from London to Boston from £319

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 20/1. 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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0 bags

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Cheap return flights

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British Airways Logo
07:50 - 15:48
LCY
-
BOS
36h 58m2 stops
British Airways Logo
16:45 - 14:35
BOS
-
LCY
16h 50m1 stop
£415British Airways
Thu, 29 Jan - Mon, 2 Feb
Multiple Airlines Logo
11:45 - 15:15
LGW
-
BOS
32h 30m1 stop
Multiple Airlines Logo
16:45 - 18:55
BOS
-
LGW
21h 10m1 stop
£415Multiple Airlines
Sun, 15 Feb - Sat, 7 Mar
Iberia Logo
11:00 - 13:35
LHR
-
BOS
7h 35mdirect
Iberia Logo
20:20 - 07:50
BOS
-
LHR
6h 30mdirect
£415Iberia
Mon, 6 Apr - Mon, 20 Apr
TAP AIR PORTUGAL Logo
16:35 - 14:35
LGW
-
BOS
27h 00m1 stop
TAP AIR PORTUGAL Logo
18:05 - 09:50
BOS
-
LGW
10h 45m1 stop
£415TAP AIR PORTUGAL
Sat, 14 Feb - Sat, 21 Feb
Multiple Airlines Logo
06:00 - 13:55
LTN
-
BOS
12h 55m1 stop
Multiple Airlines Logo
21:15 - 16:00
BOS
-
LTN
13h 45m1 stop
£415Multiple Airlines
Mon, 16 Feb - Thu, 19 Feb
American Airlines Logo
20:10 - 22:35
LHR
-
BOS
7h 25mdirect
American Airlines Logo
20:20 - 07:50
BOS
-
LHR
6h 30mdirect
£416American Airlines
Tue, 7 Apr - Wed, 22 Apr
British Airways Logo
13:30 - 16:15
LHR
-
BOS
7h 45mdirect
British Airways Logo
20:20 - 07:50
BOS
-
LHR
6h 30mdirect
£417British Airways
Sat, 17 Jan - Fri, 24 Apr
British Airways Logo
11:00 - 13:35
LHR
-
BOS
7h 35mdirect
British Airways Logo
21:50 - 09:35
BOS
-
LHR
6h 45mdirect
£418British Airways
Thu, 23 Apr - Thu, 30 Apr
TAP AIR PORTUGAL Logo
10:40 - 20:10
LGW
-
BOS
14h 30m1 stop
TAP AIR PORTUGAL Logo
22:25 - 10:05
BOS
-
LGW
30h 40m2 stops
£421TAP AIR PORTUGAL
Fri, 23 Jan - Sat, 31 Jan
Icelandair Logo
15:40 - 18:50
LGW
-
BOS
32h 10m1 stop
Icelandair Logo
23:30 - 14:40
BOS
-
LGW
10h 10m1 stop
£421Icelandair
Fri, 10 Apr - Wed, 15 Apr

Lufthansa flights from London to Boston

Our best Lufthansa deals on London to Boston flight tickets
Lufthansa
17 Apr
LCY09:15London City
11h 25m
1 stop
BOS15:40Boston Logan Intl
27 Apr
BOS21:40Boston Logan Intl
14h 50m
1 stop
LCY17:30London City
Lufthansa
2 Feb
LCY18:15London City
24h 20m
1 stop
BOS13:35Boston Logan Intl
9 Feb
BOS16:15Boston Logan Intl
12h 00m
1 stop
LCY09:15London City
Lufthansa
21 Apr
LCY09:15London City
11h 25m
1 stop
BOS15:40Boston Logan Intl
28 Apr
BOS17:45Boston Logan Intl
9h 55m
1 stop
LCY08:40London City

Icelandair flights from London to Boston

Our best Icelandair deals on London to Boston flight tickets
Icelandair
10 Apr
LGW15:40London Gatwick
32h 10m
1 stop
BOS18:50Boston Logan Intl
15 Apr
BOS23:30Boston Logan Intl
10h 10m
1 stop
LGW14:40London Gatwick
Icelandair
18 Jan
LHR12:15London Heathrow
10h 35m
1 stop
BOS17:50Boston Logan Intl
23 Sept
BOS20:50Boston Logan Intl
18h 30m
1 stop
LHR20:20London Heathrow
Icelandair
12 Jan
LGW11:55London Gatwick
10h 55m
1 stop
BOS17:50Boston Logan Intl
15 Jan
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 23 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

LCY - BOS

LCYBOS

London City

Thu 29/1

07:50-15:48

2 stops36h 58m

Boston Logan Intl

Mon 2/2

16:45-14:35

1 stop16h 50m

£415

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Sun 15/2

11:45-15:15

1 stop32h 30m

Boston Logan Intl

Sat 7/3

16:45-18:55

1 stop21h 10m

£415

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 6/4

11:00-13:35

Nonstop7h 35m

Boston Logan Intl

Mon 20/4

20:20-07:50

Nonstop6h 30m

£415

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Sat 14/2

16:35-14:35

1 stop27h 00m

Boston Logan Intl

Sat 21/2

18:05-09:50

1 stop10h 45m

£415

LondonBoston

LTN - BOS

LTNBOS

London Luton

Mon 16/2

06:00-13:55

1 stop12h 55m

Boston Logan Intl

Thu 19/2

21:15-16:00

1 stop13h 45m

£415

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 7/4

20:10-22:35

Nonstop7h 25m

Boston Logan Intl

Wed 22/4

20:20-07:50

Nonstop6h 30m

£416

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sat 17/1

13:30-16:15

Nonstop7h 45m

Boston Logan Intl

Fri 24/4

20:20-07:50

Nonstop6h 30m

£417

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 23/4

11:00-13:35

Nonstop7h 35m

Boston Logan Intl

Thu 30/4

21:50-09:35

Nonstop6h 45m

£418

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Fri 23/1

10:40-20:10

1 stop14h 30m

Boston Logan Intl

Sat 31/1

22:25-10:05

2 stops30h 40m

£421

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

£421

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 £392. 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 £508. 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 £575. 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 £500. In the evening is when there is more demand to fly to Boston, so prices are often more expensive at around £680 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 £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 £424 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 33% 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

£416

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 £416. The best return flight deal from London to Boston found on momondo in the last 72 hours is £507.
The fastest flight from London to Boston takes 7h 25m
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 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
TAP AIR PORTUGALPriceFrom £225Free CancellationRating
7.2
2,096 reviews
Search TAP AIR PORTUGAL flights
PLAYPriceFrom £249Free CancellationRating
7.0
103 reviews
Search PLAY flights
DeltaPriceFrom £295Free CancellationRating
7.9
8,014 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom £296Free CancellationRating
7.4
1,620 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom £303Free CancellationRating
7.0
592 reviews
Search Icelandair flights
LufthansaPriceFrom £303Free CancellationRating
6.8
7,649 reviews
Search Lufthansa flights
JetBluePriceFrom £329Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
United AirlinesPriceFrom £333Free CancellationRating
7.4
9,103 reviews
Search United Airlines flights
British AirwaysPriceFrom £337Free CancellationRating
6.7
7,605 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £350Free CancellationRating
7.5
677 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 15 flights/week on average for this route. A good Delta flight deal for London to Boston starts from £295 round-trip, up to an average price of £529. Our users have rated Delta at 7.9/10.

  • KLM Flights From London to Boston

    KLM (7.7/10 from 1,434 reviews) operates around 15 flights from London to Boston in any given week. The average KLM airfare for this route is around £447, with deals from around £356 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
Cape Neddick
Old Orchard Beach
Concord
Sandwich
Everett
Hampton
Quincy
Merrimack

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 22/1
Thu 29/1

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