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Cheap flights from London to Boston from £345

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
27 May — 3 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 27 April 2026.

Mon 1/608:15
LTN
-
BOS
1 stop15h 35m
Multiple Airlines
Mon 8/623:30
BOS
-
LTN
1 stop18h 20m
Multiple Airlines
Deal found 23/4£435
Fri 15/513:00
LGW
-
BOS
1 stop13h 05m
Multiple Airlines
Tue 3/1122:40
BOS
-
LGW
1 stop11h 00m
Multiple Airlines
Deal found 24/4£439
Thu 14/513:00
LGW
-
BOS
1 stop13h 05m
Multiple Airlines
Thu 5/1122:40
BOS
-
LGW
1 stop11h 00m
Multiple Airlines
Deal found 24/4£439
Fri 15/513:00
LGW
-
BOS
1 stop13h 05m
Multiple Airlines
Mon 18/523:00
BOS
-
LGW
1 stop10h 40m
Multiple Airlines
Deal found 23/4£440
Thu 14/513:35
LGW
-
BOS
1 stop12h 30m
Multiple Airlines
Mon 18/520:50
BOS
-
LGW
1 stop9h 55m
Multiple Airlines
Deal found 24/4£442
Sat 21/1116:35
LGW
-
BOS
1 stop27h 05m
TAP AIR PORTUGAL
Sat 28/1118:00
BOS
-
LGW
1 stop10h 50m
TAP AIR PORTUGAL
Deal found 24/4£443
Mon 29/613:05
LHR
-
BOS
1 stop13h 40m
Icelandair
Mon 13/720:50
BOS
-
LHR
1 stop10h 05m
Icelandair
Deal found 23/4£444
Thu 19/1110:40
LGW
-
BOS
1 stop14h 15m
TAP AIR PORTUGAL
Thu 26/1118:00
BOS
-
LGW
1 stop10h 50m
TAP AIR PORTUGAL
Deal found 22/4£444
Thu 15/1012:45
LTN
-
BOS
1 stop13h 30m
Multiple Airlines
Sun 25/1020:50
BOS
-
LTN
2 stops20h 15m
Multiple Airlines
Deal found 23/4£448
Wed 13/516:30
LGW
-
BOS
1 stop33h 35m
Multiple Airlines
Mon 18/523:00
BOS
-
LGW
2 stops12h 55m
Multiple Airlines
Deal found 24/4£448
Tue 19/520:50
LHR
-
BOS
1 stop29h 15m
LEVEL
Tue 26/522:50
BOS
-
LHR
1 stop29h 20m
LEVEL
Deal found 26/4£449
Fri 22/506:35
STN
-
BOS
2 stops16h 55m
Multiple Airlines
Mon 25/520:25
BOS
-
STN
2 stops21h 55m
Multiple Airlines
Deal found 24/4£450

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 27 April 2026.

Round-trip from

£434

One-way from

£345

Popular in

July

Cheapest in

September

Average price

£504

Good round-trip deal

£516 or less

Good one-way deal

£342 or less
LEVEL
  • LEVEL
  • 20/9-27/9
  • 2 total stops
  • 45h 30m total
  • London to Boston
Search Deals
19/5
  • 19/5
  • 2 total stops
  • 30h 40m total
  • London to Boston
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£38 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 April 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 27 April 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

LGW - BOS

LGWBOS

London Gatwick

Tue 12/5

07:20-21:05

1 stop18h 45m

Boston Logan Intl

Tue 26/5

22:50-07:15

1 stop27h 25m

£440

LondonBoston

STN - BOS

STNBOS

London Stansted

Sat 6/6

13:15-18:50

1 stop10h 35m

Boston Logan Intl

Sat 13/6

17:25-07:50

1 stop9h 25m

£465

LondonBoston

STN - BOS

STNBOS

London Stansted

Tue 12/5

07:55-21:05

1 stop18h 10m

Boston Logan Intl

Tue 26/5

22:50-19:00

1 stop15h 10m

£509

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Thu 17/9

08:40-16:35

1 stop12h 55m

Boston Logan Intl

Tue 22/9

23:10-10:40

Nonstop6h 30m

£515

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Thu 27/8

08:00-21:45

1 stop18h 45m

Boston Logan Intl

Thu 3/9

23:00-23:10

1 stop19h 10m

£525

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Sat 5/9

13:05-21:45

1 stop13h 40m

Boston Logan Intl

Mon 7/9

20:50-20:20

1 stop18h 30m

£526

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Fri 25/9

21:05-15:35

2 stops23h 30m

Boston Logan Intl

Mon 28/9

17:40-16:25

2 stops17h 45m

£529

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Wed 21/10

09:55-16:36

1 stop11h 41m

Boston Logan Intl

Wed 28/10

20:10-06:50

Nonstop6h 40m

£538

LondonBoston

LGW - BOS

LGWBOS

London Gatwick

Fri 15/5

15:40-21:45

1 stop11h 05m

Boston Logan Intl

Fri 13/11

19:50-10:55

1 stop10h 05m

£540

LondonBoston

LHR - BOS

LHRBOS

London Heathrow

Fri 29/5

09:55-16:25

1 stop11h 30m

Boston Logan Intl

Fri 5/6

21:30-09:15

Nonstop6h 45m

£541

Flights are sorted by cheapest return flights first.

Deals found on 23/4

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 £396). Flying from London to Boston in January is currently the most expensive (average of £592). 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 27 April 2026.

It’s optimal to fly from London to Boston in the afternoon. 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 27 April 2026.

The most flights from LON to BOS are scheduled on a Monday (30 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (26 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 £337.

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 15m.

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 27 April 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
1,508 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,508 reviews
KLM
7.8
Good
1,508 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.4
Good
688 reviews
KLM
7.8
Good
1,508 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
JetBlue
7.2
Good
2,967 reviews
KLM
7.8
Good
1,508 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Icelandair
7.0
Good
646 reviews
KLM
7.8
Good
1,508 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,927 reviews
KLM
7.8
Good
1,508 reviews
Check prices

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 29 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 12h 55m. Fly via LEVEL, Delta, or Scandinavian Airlines 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), Icelandair (£281), and TAP AIR PORTUGAL (£294) 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 £251 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 (81%), Gulf Air (80%) and Scandinavian Airlines (79%).

  • What are the cheapest flights from London to Boston?

    Looking for the cheapest flight from London to Boston? While on average our users pay £941, our data indicates the cheapest price to be £338. The most popular route (London Heathrow - Boston Logan Intl), is priced around £368.

  • 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 £396). Flying from London to Boston in January is currently the most expensive (average of £592). 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 27 April 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 27 April 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£146Average£532FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£281Average£450FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£294Average£368FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£297Average£486FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
PLAYCheapest£300Average£422FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
LufthansaCheapest£310Average£389FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
JetBlueCheapest£317Average£504FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Aer LingusCheapest£325Average£547FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£330Average£395FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£346Average£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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