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Cheap flights from Boston to London from C$ 399

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 20/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LON
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to London are usually found in October or January, booked 61 days in advance, depart on a Tuesday or Saturday and return on a Monday

Cheap 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 27 July 2026.

Wed 21/105:50 p.m.
BOS
-
LHR
2 stops58h 45m
Scandinavian Airlines
Sun 25/106:40 a.m.
LHR
-
BOS
1 stop14h 00m
Scandinavian Airlines
Deal found 27/7C$ 905
Fri 16/108:50 p.m.
BOS
-
LGW
1 stop12h 50m
Icelandair
Wed 21/103:40 p.m.
LGW
-
BOS
1 stop11h 05m
Icelandair
Deal found 24/7C$ 928
Thu 29/108:50 p.m.
BOS
-
LHR
1 stop10h 00m
Icelandair
Sun 15/1112:15 p.m.
LHR
-
BOS
1 stop10h 35m
Icelandair
Deal found 26/7C$ 929
Wed 30/911:00 p.m.
BOS
-
LHR
1 stop16h 20m
Icelandair
Fri 9/101:05 p.m.
LHR
-
BOS
1 stop10h 45m
Icelandair
Deal found 23/7C$ 931
Wed 30/98:50 p.m.
BOS
-
LGW
1 stop12h 50m
Icelandair
Sat 10/103:40 p.m.
LGW
-
BOS
1 stop32h 10m
Icelandair
Deal found 23/7C$ 931
Mon 19/105:50 p.m.
BOS
-
LHR
2 stops18h 10m
Scandinavian Airlines
Sun 25/107:50 p.m.
LHR
-
BOS
2 stops24h 50m
Scandinavian Airlines
Deal found 23/7C$ 934
Tue 20/105:40 p.m.
BOS
-
LHR
2 stops18h 20m
Scandinavian Airlines
Sun 25/107:50 p.m.
LHR
-
BOS
2 stops24h 50m
Scandinavian Airlines
Deal found 27/7C$ 935
Sat 5/95:40 p.m.
BOS
-
LHR
1 stop10h 40m
Scandinavian Airlines
Sat 12/96:40 a.m.
LHR
-
BOS
1 stop13h 55m
Scandinavian Airlines
Deal found 25/7C$ 936
Tue 13/105:40 p.m.
BOS
-
LHR
2 stops18h 20m
Scandinavian Airlines
Tue 20/109:05 p.m.
LHR
-
BOS
2 stops23h 30m
Scandinavian Airlines
Deal found 24/7C$ 939
Tue 29/98:50 p.m.
BOS
-
LGW
1 stop12h 50m
Icelandair
Wed 14/103:40 p.m.
LGW
-
BOS
1 stop11h 05m
Icelandair
Deal found 23/7C$ 939
Fri 25/98:50 p.m.
BOS
-
LHR
1 stop18h 30m
Icelandair
Sat 10/101:05 p.m.
LHR
-
BOS
1 stop10h 45m
Icelandair
Deal found 23/7C$ 941
Fri 18/98:50 p.m.
BOS
-
LGW
1 stop12h 50m
Icelandair
Wed 30/93:40 p.m.
LGW
-
BOS
1 stop32h 10m
Icelandair
Deal found 24/7C$ 941

Find 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 27 July 2026.

Round-trip from

C$ 905

One-way from

C$ 399

Popular in

June

Cheapest in

October

Average price

C$ 1,207

Good round-trip deal

C$ 877 or less

Good one-way deal

C$ 671 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 21/10-25/10
  • 3 total stops
  • 72h 45m total
  • Boston to London
Search Deals
JetBlue
  • JetBlue
  • 20/9
  • Nonstop
  • 6h 52m total
  • Boston to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 427 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to London (LON).
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 27 July 2026.
Use the filters below to find and compare flights from Boston to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Tue 13/10

5:40 p.m.-5:00 p.m.

2 stops18h 20m

London Heathrow

Mon 19/10

9:05 p.m.-3:35 p.m.

2 stops23h 30m

C$ 939

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 7/10

5:40 p.m.-4:25 p.m.

2 stops17h 45m

London Heathrow

Wed 14/10

9:05 p.m.-3:35 p.m.

2 stops23h 30m

C$ 958

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sat 26/9

5:40 p.m.-2:35 p.m.

2 stops15h 55m

London Heathrow

Wed 30/9

9:05 p.m.-3:35 p.m.

2 stops23h 30m

C$ 958

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 20/9

5:40 p.m.-4:25 p.m.

2 stops17h 45m

London Heathrow

Sat 26/9

5:30 p.m.-3:35 p.m.

2 stops27h 05m

C$ 980

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 13/9

5:40 p.m.-4:00 p.m.

1 stop17h 20m

London Heathrow

Thu 15/10

7:30 p.m.-3:35 p.m.

1 stop25h 05m

C$ 984

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 20/8

5:40 p.m.-5:40 p.m.

1 stop19h 00m

London Heathrow

Mon 7/9

7:05 a.m.-3:35 p.m.

2 stops37h 30m

C$ 1,032

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 6/9

5:40 p.m.-12:55 p.m.

2 stops14h 15m

London Heathrow

Sat 12/9

6:40 a.m.-3:35 p.m.

1 stop13h 55m

C$ 1,037

BostonLondon

BOS - LGW

BOSLGW

Boston Logan Intl

Thu 24/9

6:05 p.m.-9:45 a.m.

1 stop10h 40m

London Gatwick

Sun 27/9

9:15 p.m.-8:20 p.m.

1 stop28h 05m

C$ 1,049

BostonLondon

BOS - LGW

BOSLGW

Boston Logan Intl

Tue 13/10

10:45 p.m.-11:20 a.m.

2 stops31h 35m

London Gatwick

Mon 19/10

12:05 p.m.-8:20 p.m.

1 stop13h 15m

C$ 1,062

BostonLondon

BOS - LGW

BOSLGW

Boston Logan Intl

Tue 24/11

10:45 p.m.-9:50 a.m.

2 stops30h 05m

London Gatwick

Sun 29/11

9:05 a.m.-8:45 p.m.

1 stop16h 40m

C$ 1,069

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/7

Showing 1-10 of 45 resultsSorted by cheapest first
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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 round-trip 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

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

Currently, January is the cheapest month in which you can book a flight from Boston to London (average of C$ 742). Flying from Boston to London in June is currently the most expensive (average of C$ 1,437). 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 27 July 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boston to London as you normally would.

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 27 July 2026.

The most flights from BOS to LON are scheduled on a Friday (46 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (39 on average).

How much does it cost to fly round-trip from Boston to London?

Airfare is typical for this route at the moment.
Boston to London flights typically cost between C$ 726 and C$ 1,108 in October.
The cheapest round-trip price found within the last 5 days was C$ 905 on Scandinavian Airlines (21 Oct-25 Oct).

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 143 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?

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 Boston to London flights?

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

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

The best time to book flights from Boston to London is 23 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.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 27 July 2026.
Check out reviews from past customers who have flown with British Airways from Boston to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
8,130 reviews
Check prices

Entertainment

6.5

Food

6.4

Comfort

6.8

Overall

6.7

Boarding

7.0

Crew

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

IAH - LHR

Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.
British Airways
6.7
Okay
8,130 reviews
British Airways
6.7
Okay
8,130 reviews
Check prices

Entertainment

6.5

Food

6.4

Comfort

6.8

Overall

6.7

Boarding

7.0

Crew

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

IAH - LHR

Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.

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?

    Located just 4.2 km from the city centre, Boston Logan Intl is the airport most travellers will use when flying to London from Boston. Booking flights from Logan Intl (BOS) to London should be relatively easy as there are 41 daily outbound flights to London from 0 different airlines.

  • How long is the flight from Boston to London?

    Departing from Boston to London will take you 10h 40m. The distance between Boston and London is about 5266 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Consider Gulf Air (93%), JetBlue (85%) or TAP AIR PORTUGAL (85%) 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 C$ 860 for a flight from Boston to London. The cheapest flight overall is C$ 426 while the most popular route, (Boston Logan Intl - London Gatwick) is currently priced at C$ 921.

  • 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 vacation 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, January is the cheapest month in which you can book a flight from Boston to London (average of C$ 742). Flying from Boston to London in June is currently the most expensive (average of C$ 1,437). 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
Gatwick
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Twickenham
Ilford
Bromley
Sutton
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Watford
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Can Cheapflights find flights from Boston to London with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Boston to London, users can toggle the no change fees filter when performing a flight search.

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