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Cheap flights from London to Boston from £343

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOS
2 Jun — 9 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Boston Logan Intl are usually found in September or February, booked 79 days in advance, depart on a Wednesday or Thursday and return on a Monday

Cheap flight deals from London to Boston

Enter your travel dates to find the best prices.

Cheapest flights from London to Boston
Explore the most affordable flight options available from London to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 May 2026.

Tue 8/916:30
LHR
-
BOS
1 stop26h 10m
ITA Airways
Tue 22/917:05
BOS
-
LHR
1 stop11h 35m
ITA Airways
Deal found 29/4£459
Mon 1/621:50
LTN
-
BOS
2 stops21h 55m
Multiple Airlines
Mon 8/616:45
BOS
-
LTN
2 stops23h 20m
Multiple Airlines
Deal found 28/4£459
Tue 24/1108:15
LHR
-
BOS
2 stops17h 30m
TAP AIR PORTUGAL
Tue 1/1218:00
BOS
-
LHR
1 stop13h 40m
TAP AIR PORTUGAL
Deal found 27/4£460
Tue 7/716:50
LGW
-
BOS
1 stop33h 15m
LEVEL
Wed 15/722:55
BOS
-
LGW
1 stop30h 20m
LEVEL
Deal found 28/4£461
Sat 24/1012:05
LGW
-
BOS
1 stop13h 15m
TAP AIR PORTUGAL
Thu 29/1023:10
BOS
-
LGW
1 stop12h 40m
TAP AIR PORTUGAL
Deal found 28/4£462
Mon 1/609:05
STN
-
BOS
2 stops34h 40m
Multiple Airlines
Mon 8/616:45
BOS
-
STN
2 stops21h 50m
Multiple Airlines
Deal found 28/4£463
Mon 13/717:35
LHR
-
BOS
Nonstop7h 30m
British Airways
Thu 20/807:25
BOS
-
LHR
Nonstop6h 30m
British Airways
Deal found 28/4£463
Tue 19/507:40
LGW
-
BOS
1 stop18h 25m
Multiple Airlines
Tue 26/516:35
BOS
-
LGW
2 stops22h 35m
Multiple Airlines
Deal found 28/4£463
Tue 1/913:05
LHR
-
BOS
1 stop13h 40m
Icelandair
Thu 10/920:50
BOS
-
LHR
1 stop10h 05m
Icelandair
Deal found 28/4£464
Sat 19/912:05
LGW
-
BOS
1 stop13h 15m
TAP AIR PORTUGAL
Mon 12/1023:15
BOS
-
LGW
1 stop16h 10m
TAP AIR PORTUGAL
Deal found 28/4£464
Thu 16/713:00
LGW
-
BOS
1 stop10h 50m
Icelandair
Sat 22/820:50
BOS
-
LGW
1 stop12h 45m
Icelandair
Deal found 28/4£465
Wed 2/913:05
LHR
-
BOS
1 stop10h 45m
Icelandair
Wed 23/920:50
BOS
-
LHR
1 stop10h 05m
Icelandair
Deal found 29/4£465

Find flight deals from London to Boston

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 3 May 2026.

Round-trip from

£459

One-way from

£343

Popular in

July

Cheapest in

September

Average price

£466

Good round-trip deal

£517 or less

Good one-way deal

£337 or less
ITA Airways
  • ITA Airways
  • 8/9-22/9
  • 2 total stops
  • 37h 45m total
  • London to Boston
Search Deals
19/5
  • 19/5
  • 2 total stops
  • 36h 20m total
  • London to Boston
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£37 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Boston Logan Intl.
Search Deals
Price to beat on a one-way flight from London (LON) to Boston Logan Intl.
Search Deals

Cheapflights 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, Cheapflights users made 858,174 searches. Data last updated 3 May 2026.
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

Cheapest return flight

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sun 30/8

09:55-21:55

1 stop17h 00m

Boston Logan Intl

Sun 6/9

23:50-09:10

1 stop28h 20m

£493

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 28/10

07:30-18:13

2 stops14h 43m

Boston Logan Intl

Wed 18/11

12:30-06:20

1 stop12h 50m

£523

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 13/5

09:15-16:10

1 stop11h 55m

Boston Logan Intl

Mon 25/5

06:30-21:40

1 stop10h 10m

£532

LondonBoston

LTN - BOS

LTNBOS

London Luton

Mon 1/6

08:15-18:50

1 stop15h 35m

Boston Logan Intl

Sun 7/6

21:15-21:40

1 stop19h 25m

£535

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Tue 29/9

18:55-21:20

Nonstop7h 25m

Boston Logan Intl

Tue 6/10

21:30-09:15

Nonstop6h 45m

£537

LondonBoston

STN - BOS

STNBOS

London Stansted

Thu 28/5

16:15-15:35

2 stops28h 20m

Boston Logan Intl

Thu 4/6

17:40-23:20

2 stops24h 40m

£540

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Mon 1/6

09:55-18:30

1 stop13h 35m

Boston Logan Intl

Mon 8/6

23:10-10:40

Nonstop6h 30m

£541

LondonBoston

LTN - BOS

LTNBOS

London Luton

Mon 1/6

07:55-19:25

1 stop16h 30m

Boston Logan Intl

Mon 8/6

21:20-13:45

1 stop11h 25m

£541

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 28/5

06:40-15:35

1 stop13h 55m

Boston Logan Intl

Mon 8/6

17:40-16:25

2 stops17h 45m

£545

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Thu 10/9

13:00-18:50

1 stop10h 50m

Boston Logan Intl

Sun 20/9

20:50-14:40

1 stop12h 50m

£545

Flights are sorted by cheapest return flights first.

Deals found on 30/4

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from London to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Boston

How far ahead should I book a flight from London to Boston?

The best time to book flights from London to Boston is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London to Boston?

Currently, September is the cheapest month in which you can book a flight from London to Boston (average of £395). Flying from London to Boston in January is currently the most expensive (average of £591). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to BOS?

Find hourly flight availability from London to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 May 2026.

It’s optimal to fly from London to Boston at midday. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from London to Boston?

Use this chart to determine the cheapest time to fly return from London to Boston. Price data was last updated on 25 April 2026.

Travellers seeking maximum savings on their London to Boston flight should consider departing on Wednesday at midday when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Boston

Explore weekly flight availability from London to Boston. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 3 May 2026.

The most flights from LON to BOS are scheduled on a Monday (30 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (16 on average).

How much does it cost for a return flight from London to Boston?

What’s the top stopover airport for flights from London to Boston?

Share of one-stop return flights from London to Boston chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 48% of one-stop itineraries from London to Boston on Cheapflights.

What’s the cheapest stopover airport for flights from London to Boston?

Average return fare for one-stop flights from London to Boston, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £336.

What’s the fastest stopover option from London to Boston?

Shortest average travel time for one-stop one-way flights from London to Boston, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 10h 12m.

Which airport typically offers the quickest stopover for flights from London to Boston?

Average stopover duration for one-stop one-way flights from London to Boston, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Philadelphia (PHL) offer the fastest connection on this route, with an average stopover time of 1h 23m.

How often are flights from London to Boston delayed?

About 9% of weekly flights between London and Boston have experienced delays in the past year, with the average delay time being 144 minutes.

What is the most punctual flight time for London to Boston flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Boston flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 5% of flights being delayed.

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated 3 May 2026.
See what other customers who have flown with KLM,Virgin Atlantic, andJetBlue from London to Boston have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,509 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,509 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Virgin Atlantic
7.4
Good
688 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
JetBlue
7.1
Good
2,967 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Icelandair
7.0
Good
646 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
7,937 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from London to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Boston from London?

    Boston Logan Intl (BOS), located 2.6 mi from the city center, is the airport you fly into when you book flights from London to Boston. 17 airlines have flights to Logan Intl from London on a regular basis. Booking flights from London to Boston Logan Intl should not be difficult; the airport handles an average of 26 inbound flights from London per day.

  • How long is the flight from London to Boston?

    There are many flights that can get you from London to Boston in 11h 55m. Fly via LEVEL, United Airlines, or British Airways to get the fastest option. There are 3254 mi between London and Boston. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from London to Boston round-trip?

    According to our current data, Delta (£146), TAP AIR PORTUGAL (£222), and Icelandair (£278) offers the cheapest pricing from London to Boston. Users have found that Delta is 68% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from London to Boston one-way?

    One-way options have recently been found by users for as low as £250 on JetBlue. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £251 and Air Canada from £268 one-way.

  • What are the most popular routes from London to Boston?

    The most popular route from London to Boston is London Heathrow - Boston Logan Intl. You may also consider London Gatwick - Boston Logan Intl or London City - Boston Logan Intl.

  • What are the most reliable airlines from London to Boston?

    The top 3 most reliable airlines when flying from London to Boston are KLM (85%), Gulf Air (85%) and Air France (84%).

  • What are the cheapest flights from London to Boston?

    Looking for the cheapest flight from London to Boston? While on average our users pay £938, our data indicates the cheapest price to be £337. The most popular route (London Heathrow - Boston Logan Intl), is priced around £382.

  • Can I find deals for flights from London to Boston that include hotel bookings?

    Yes. In addition to deals on London to Boston flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Boston.

  • Can I find deals for business class flights from London to Boston?

    Yes. Cheapflights offers flight deals from London to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London to Boston?

    Currently, September is the cheapest month in which you can book a flight from London to Boston (average of £395). Flying from London to Boston in January is currently the most expensive (average of £591). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Burlington
Canton
Waltham
Warwick
Cambridge
Peabody
Somerville
Quincy
Chelmsford

Browse thousands of different options on Cheapflights for your next trip

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Fly from London to Boston on these airlines

Choose from the following airlines for your flight from London to Boston. Flights are based on user searches made on Cheapflights and were last updated on 3 May 2026.
Virgin Atlantic flights from London to Boston Logan Intl
British Airways flights from London to Boston Logan Intl
Finnair flights from London to Boston Logan Intl

Top 10 airlines flying from London to Boston

Discover the top 10 airlines that operate flights from London to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 May 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£146Average£526FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£280Average£448FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£293Average£367FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£296Average£485FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
PLAYCheapest£299Average£421FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
LufthansaCheapest£303Average£388FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
JetBlueCheapest£316Average£506FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Aer LingusCheapest£323Average£545FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£329Average£394FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£345Average£440FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Boston?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Boston from London today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from London to Boston?

Millions of users choose and trust Cheapflights to book the best flight deals from London to Boston for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from London to Boston with no change fees?

Yes! Cheapflights helps users easily find flights from London to Boston with no change fees.

Can Cheapflights notify me if prices for flights from London to Boston become cheaper?

Yes! Start tracking prices for London to Boston flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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