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Cheap flights from London to Boston from $420

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 4/21. 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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TAP AIR PORTUGAL Logo
10:10 am - 8:10 pmLGW-BOS
15h 00m2 stops
TAP AIR PORTUGAL Logo
10:45 pm - 8:20 amBOS-LGW
28h 35m2 stops
$464TAP AIR PORTUGAL
Find Deal
Thu, Jan 15 - Fri, Feb 6
TAP AIR PORTUGAL Logo
8:15 am - 8:10 pmLHR-BOS
16h 55m1 stop
TAP AIR PORTUGAL Logo
6:05 pm - 12:40 pmBOS-LHR
13h 35m1 stop
$465TAP AIR PORTUGAL
Find Deal
Sat, Dec 6 - Sat, Jan 31
Multiple Airlines Logo
6:30 am - 5:50 pmSTN-BOS
16h 20m2 stops
Multiple Airlines Logo
7:50 pm - 5:50 pmBOS-STN
17h 00m2 stops
$466Multiple Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
TAP AIR PORTUGAL Logo
8:15 am - 8:10 pmLHR-BOS
16h 55m1 stop
TAP AIR PORTUGAL Logo
6:05 pm - 12:40 pmBOS-LHR
13h 35m1 stop
$466TAP AIR PORTUGAL
Find Deal
Sat, Dec 6 - Sat, Jan 31
Multiple Airlines Logo
8:30 am - 5:50 pmSTN-BOS
14h 20m2 stops
Multiple Airlines Logo
7:50 pm - 9:20 pmBOS-STN
20h 30m2 stops
$468Multiple Airlines
Find Deal
Mon, Jan 12 - Mon, Jan 19
Icelandair Logo
11:55 am - 5:50 pmLGW-BOS
10h 55m1 stop
Icelandair Logo
7:50 pm - 10:55 amBOS-LGW
10h 05m1 stop
$472Icelandair
Find Deal
Mon, Jan 12 - Mon, Jan 19
Icelandair Logo
11:55 am - 10:35 amLGW-BOS
27h 40m1 stop
Icelandair Logo
11:35 am - 10:55 amBOS-LGW
18h 20m1 stop
$481Icelandair
Find Deal
Wed, Nov 26 - Sun, Nov 30
SWISS Logo
9:15 am - 8:20 pmLCY-BOS
16h 05m1 stop
SWISS Logo
10:10 pm - 12:55 pmBOS-LCY
9h 45m1 stop
$572SWISS
Find Deal
Tue, Feb 17 - Mon, Feb 23
Virgin Atlantic Logo
8:40 am - 1:35 pmLCY-BOS
9h 55m1 stop
Virgin Atlantic Logo
4:45 pm - 8:10 amBOS-LCY
10h 25m1 stop
$576Virgin Atlantic
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Thu, May 14 - Sun, May 17
SWISS Logo
1:30 pm - 9:20 pmLCY-BOS
11h 50m1 stop
SWISS Logo
10:50 pm - 12:55 pmBOS-LCY
10h 05m1 stop
$577SWISS
Find Deal
Thu, Mar 12 - Tue, Mar 17

Icelandair flights from London to Boston

Our best Icelandair deals on London to Boston flight tickets
Icelandair
Apr 16
LHR1:05 pmLondon Heathrow
10h 45m
1 stop
BOS6:50 pmBoston Logan Intl
Apr 30
BOS11:30 pmBoston Logan Intl
15h 50m
1 stop
LHR8:20 pmLondon Heathrow
$467
Find similar
Icelandair
Apr 16
LHR1:05 pmLondon Heathrow
10h 45m
1 stop
BOS6:50 pmBoston Logan Intl
Apr 30
BOS8:50 pmBoston Logan Intl
18h 30m
1 stop
LHR8:20 pmLondon Heathrow
$468
Find similar
Icelandair
Apr 10
LHR9:25 pmLondon Heathrow
26h 25m
1 stop
BOS6:50 pmBoston Logan Intl
Apr 14
BOS8:50 pmBoston Logan Intl
18h 30m
1 stop
LHR8:20 pmLondon Heathrow
$471
Find similar

KLM flights from London to Boston

Our best KLM deals on London to Boston flight tickets
KLM
Apr 10
LCY8:40 amLondon City
9h 55m
1 stop
BOS1:35 pmBoston Logan Intl
Apr 26
BOS6:40 pmBoston Logan Intl
9h 10m
1 stop
LCY8:50 amLondon City
$641
Find similar
KLM
Nov 27
LCY7:45 amLondon City
10h 35m
1 stop
BOS1:20 pmBoston Logan Intl
Dec 7
BOS7:10 pmBoston Logan Intl
9h 20m
1 stop
LCY9:30 amLondon City
$671
Find similar
KLM
Nov 20
LCY7:45 amLondon City
10h 35m
1 stop
BOS1:20 pmBoston Logan Intl
Nov 24
BOS7:10 pmBoston Logan Intl
9h 20m
1 stop
LCY9:30 amLondon City
$672
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated November 17, 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

LGW - BOS

LGWBOS

London Gatwick

Thu 1/15

10:10 am-8:10 pm

2 stops15h 00m

Boston Logan Intl

Fri 2/6

10:45 pm-8:20 am

2 stops28h 35m

$464

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sat 12/6

8:15 am-8:10 pm

1 stop16h 55m

Boston Logan Intl

Sat 1/31

6:05 pm-12:40 pm

1 stop13h 35m

$465

LondonBoston

STN - BOS

STNBOS

London Stansted

Wed 12/3

6:30 am-5:50 pm

2 stops16h 20m

Boston Logan Intl

Wed 12/10

7:50 pm-5:50 pm

2 stops17h 00m

$466

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sat 12/6

8:15 am-8:10 pm

1 stop16h 55m

Boston Logan Intl

Sat 1/31

6:05 pm-12:40 pm

1 stop13h 35m

$466

LondonBoston

STN - BOS

STNBOS

London Stansted

Mon 1/12

8:30 am-5:50 pm

2 stops14h 20m

Boston Logan Intl

Mon 1/19

7:50 pm-9:20 pm

2 stops20h 30m

$468

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Mon 1/12

11:55 am-5:50 pm

1 stop10h 55m

Boston Logan Intl

Mon 1/19

7:50 pm-10:55 am

1 stop10h 05m

$472

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Wed 11/26

11:55 am-10:35 am

1 stop27h 40m

Boston Logan Intl

Sun 11/30

11:35 am-10:55 am

1 stop18h 20m

$481

LondonBoston

LCY - BOS

LCYBOS

London City

Tue 2/17

9:15 am-8:20 pm

1 stop16h 05m

Boston Logan Intl

Mon 2/23

10:10 pm-12:55 pm

1 stop9h 45m

$572

LondonBoston

LCY - BOS

LCYBOS

London City

Thu 5/14

8:40 am-1:35 pm

1 stop9h 55m

Boston Logan Intl

Sun 5/17

4:45 pm-8:10 am

1 stop10h 25m

$576

LondonBoston

LCY - BOS

LCYBOS

London City

Thu 3/12

1:30 pm-9:20 pm

1 stop11h 50m

Boston Logan Intl

Tue 3/17

10:50 pm-12:55 pm

1 stop10h 05m

$577

Flights are sorted by cheapest round-trip 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 $526. If you aren’t able to travel during the month of September, then book flights to Boston from London during February instead. Flights to Boston in February, while not as cheap as those in September, still average around $534.

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart from London to Boston is on a Wednesday when prices can be found for as low as $687. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Sunday is $794.

What is the cheapest time of day to depart on your flight to Boston?

According to our data, the cheapest time of day to fly to Boston is in the afternoon. momondo users have found flights departing from London to Boston in the afternoon for as low as $714. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Boston, so prices are often more expensive at around $757 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 $620 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from London for as low as $580 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.

How have London to Boston flight prices changed over time?

As of November 2025, prices for London to Boston flights are approximately 65% 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 round-trip 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

$521

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 $521. The best round-trip flight deal from London to Boston found on momondo in the last 72 hours is $580.
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)
Search flight deals

  • How far is London to Boston Logan Intl by plane?

    A flight from London to Boston Logan Intl will travel around 3269.0 mi. By plane, this route typically takes 9h 50m.

  • 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 updated daily.

  • 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?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 travel and health documents required for your trip to Boston Logan Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boston Logan Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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 $352Free CancellationRating
7.0
103 reviews
Search PLAY flights
FinnairPriceFrom $404Free CancellationRating
7.6
1,334 reviews
Search Finnair flights
Aer LingusPriceFrom $412Free CancellationRating
7.2
1,373 reviews
Search Aer Lingus flights
IcelandairPriceFrom $414Free CancellationRating
7.0
580 reviews
Search Icelandair flights
JetBluePriceFrom $456Free CancellationRating
7.2
2,905 reviews
Search JetBlue flights
British AirwaysPriceFrom $465Free CancellationRating
6.7
7,528 reviews
Search British Airways flights
DeltaPriceFrom $481Free CancellationRating
7.9
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $486Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights
IberiaPriceFrom $539Free CancellationRating
7.0
3,020 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $551Free CancellationRating
7.5
673 reviews
Search Virgin Atlantic flights

  • Delta Flights From London to Boston

    Delta flight deals from London to Boston start from $481 round-trip. Over the 17 Delta flights for this route in a normal week, average airfare is usually $739 round-trip - but some users have found much cheaper deals with momondo.

  • Finnair Flights From London to Boston

    Finnair is also a popular choice for this route. Finnair flight deals for London to Boston start from as low as $404 round-trip, depending on your selected dates, with average Finnair deals seen on momondo around $676. Finnair operates 24 flights to Boston from London in an average week. Users have rated it 7.6/10 across 1,334 reviews.

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Salem
Ogunquit
Old Orchard Beach
Hampton
York Beach
Plymouth
Kennebunkport
Cambridge
South Yarmouth
Narragansett
Nashua
Gloucester
Falmouth
Laconia
Brockton
Concord
Everett
Sturbridge
Chatham

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?

Yes. momondo allows you to filter the results for London to Boston flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Boston?

Once you have performed a search for London to Boston flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Boston right now. Can momondo alert me if prices change?

Price alerts on flights to Boston from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Boston trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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