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Cheap flights from Boston to London from $334

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 21/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LON
13 Feb — 20 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to London are usually found in October or September, booked 71 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Boston to London

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to London (LON). 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 14 January 2026.

Round-trip from

$738

One-way from

$334

Popular in

June

Cheapest in

October

Average price

$845

Good one-way deal

$2,250 or less
British Airways
  • British Airways
  • 25/1-27/2
  • Nonstop
  • 14h 30m total
  • Boston to London
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KLM
  • KLM
  • 15/4
  • Nonstop
  • 6h 45m total
  • Boston to London
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Highest demand for flights based on searches. 13% potential increase in price ($220 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($38 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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Price to beat on a one-way flight from Boston Logan Intl to London (LON).
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Find flight deals from Boston to London

Enter your travel dates to find the best prices.

Cheapest flights from Boston to London
Explore the most affordable flight options available from Boston to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 January 2026.

Wed 25/220:00
BOS
-
LHR
Nonstop6h 50m
Delta
Fri 6/309:40
LHR
-
BOS
Nonstop7h 45m
Delta
Deal found 14/1$738
Thu 12/310:15
BOS
-
LHR
1 stop16h 55m
United Airlines
Thu 19/313:45
LHR
-
BOS
1 stop11h 35m
United Airlines
Deal found 12/1$739
Mon 23/215:49
BOS
-
LGW
2 stops22h 11m
British Airways
Mon 2/319:40
LGW
-
BOS
1 stop24h 35m
British Airways
Deal found 14/1$739
Fri 13/206:00
BOS
-
LHR
1 stop10h 20m
United Airlines
Tue 17/213:45
LHR
-
BOS
1 stop11h 35m
United Airlines
Deal found 12/1$740
Tue 24/221:50
BOS
-
LHR
1 stop10h 10m
United Airlines
Thu 5/312:05
LHR
-
BOS
1 stop13h 15m
United Airlines
Deal found 14/1$742
Tue 10/313:55
BOS
-
LHR
1 stop14h 10m
Delta
Tue 24/309:40
LHR
-
BOS
Nonstop7h 45m
Delta
Deal found 13/1$743
Tue 3/222:40
BOS
-
LGW
1 stop28h 50m
LEVEL
Sun 8/221:40
LGW
-
BOS
1 stop28h 15m
LEVEL
Deal found 13/1$743
Fri 13/206:00
BOS
-
LHR
1 stop9h 35m
United Airlines
Thu 19/209:05
LHR
-
BOS
1 stop34h 00m
United Airlines
Deal found 12/1$745
Wed 7/1015:20
BOS
-
LHR
1 stop10h 10m
United Airlines
Wed 28/1011:10
LHR
-
BOS
1 stop12h 25m
United Airlines
Deal found 12/1$748
Thu 12/321:00
BOS
-
LHR
Nonstop6h 50m
Multiple Airlines
Tue 17/308:55
LHR
-
BOS
1 stop12h 25m
Multiple Airlines
Deal found 12/1$749
Tue 10/322:20
BOS
-
LGW
2 stops29h 35m
British Airways
Thu 19/311:45
LGW
-
BOS
1 stop13h 05m
British Airways
Deal found 12/1$749
Wed 6/519:00
BOS
-
LHR
Nonstop6h 45m
KLM
Wed 13/509:55
LHR
-
BOS
1 stop11h 38m
KLM
Deal found 12/1$751

Cheapflights Fare Finder

 
Customise your flight search to find flights from Boston to London 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 647,157 searches. Data last updated 14 January 2026.
Use the filters below to find and compare flights from Boston to London that are best for you.

Fly from

Boston

Fly to

London

Route

Depart

Return

Price

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 25/1

20:00-07:50

Nonstop6h 50m

London Heathrow

Tue 3/2

13:05-16:00

Nonstop7h 55m

$738

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 9/2

17:05-10:15

1 stop12h 10m

London Heathrow

Fri 20/2

13:05-16:00

Nonstop7h 55m

$745

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 12/3

21:00-07:50

Nonstop6h 50m

London Heathrow

Wed 18/3

09:00-17:20

1 stop12h 20m

$749

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 6/3

20:00-07:50

Nonstop6h 50m

London Heathrow

Tue 10/3

13:05-17:00

Nonstop7h 55m

$758

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sat 25/4

18:40-21:00

1 stop21h 20m

London Heathrow

Sat 9/5

12:10-15:30

1 stop32h 20m

$758

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 6/5

09:02-06:20

1 stop16h 18m

London Heathrow

Thu 14/5

09:55-16:33

1 stop11h 38m

$758

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 6/3

20:00-07:50

Nonstop6h 50m

London Heathrow

Tue 10/3

13:05-17:00

Nonstop7h 55m

$758

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 8/3

21:00-07:50

Nonstop6h 50m

London Heathrow

Sun 15/3

09:40-13:25

Nonstop7h 45m

$760

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 6/5

20:15-08:00

Nonstop6h 45m

London Heathrow

Tue 12/5

17:35-20:05

Nonstop7h 30m

$761

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 5/5

19:00-06:45

Nonstop6h 45m

London Heathrow

Thu 14/5

16:50-19:35

Nonstop7h 45m

$761

Flights are sorted by cheapest return flights first.

Deals found on 13/1

Showing 1-10 of 60 results
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Best time to book a flight from Boston to London

Have a flexible travel schedule? Discover the best time to fly to London from Boston 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 Boston to London

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

Use this chart to determine the optimal time to book a return flight from Boston to London. Price data was last updated on 9 January 2026.

Booking 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Boston to London (average of $464). Flying from Boston to London in June is currently the most expensive (average of $824). 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 BOS to LON?

Find hourly flight availability from Boston to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 January 2026.

When flying from Boston to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Boston to London

Explore weekly flight availability from Boston to London. 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 14 January 2026.

The most flights from BOS to LON are scheduled on a Monday (27 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (22 on average).

How often are flights from Boston to London delayed?

About 11% of weekly flights between Boston and London have experienced delays in the past year, with the average delay time being 140 minutes.

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

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

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

Friday 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 Boston to London flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 8% of flights being delayed.

Related info for your journey

Find useful and relevant information for your journey from Boston to London. 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 from for flights from Boston to London?

    If you book a flight to London from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 4.2 km from the centre of Boston. There are 24 flights from Logan Intl to London per day from 0 different airlines.

  • How long is the flight from Boston to London?

    A quick flight from Boston to London can take about 6h 35m. British Airways provides one of the quickest options available for as low as $740. Airlines will cover a distance of 5237 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    When deciding which route to take from Boston to London, consider Boston Logan Intl - London Stansted, Boston Logan Intl - London Luton or Boston Logan Intl - London Southend, as they are the most popular.

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

    Consider Malaysia Airlines (91%), KLM (84%) or Air France (84%) when booking your flight. These represent the most reliable airlines when flying from Boston to London.

  • What are the cheapest flights from Boston to London?

    On average you can expect to pay $3,332 for a flight from Boston to London. The cheapest flight overall is $2,250 while the most popular route, (Boston Logan Intl - London Stansted) is currently priced at $520.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to London 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 Boston to London?

    Currently, August is the cheapest month in which you can book a flight from Boston to London (average of $464). Flying from Boston to London in June is currently the most expensive (average of $824). 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 London?

Book flights to London if you plan to visit one of these locations
Kingston upon Thames
Hounslow
Horsham
Southall
Chatham
Dover
Braintree
Gatwick
Chertsey

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Cheapflights helps you find that perfect flight to London from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from Boston to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Yes! Start tracking prices for Boston to London 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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