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Cheap flights from Boise to London Heathrow Airport from £256

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 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
27 Mar — 3 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boise to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Boise to Heathrow
Explore the most affordable flight options available from Boise to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 February 2026.

Mon 20/413:29
BOI
-
LHR
1 stop14h 01m
Finnair
Fri 1/514:25
LHR
-
BOI
1 stop15h 29m
Finnair
Deal found 22/2£518
Mon 27/413:29
BOI
-
LHR
1 stop14h 01m
Finnair
Fri 8/514:25
LHR
-
BOI
1 stop15h 29m
Finnair
Deal found 22/2£519
Sat 3/1010:23
BOI
-
LHR
2 stops39h 57m
Scandinavian Airlines
Mon 12/1019:30
LHR
-
BOI
2 stops34h 38m
Scandinavian Airlines
Deal found 23/2£522
Tue 22/912:42
BOI
-
LHR
2 stops20h 18m
Scandinavian Airlines
Mon 5/1019:30
LHR
-
BOI
2 stops31h 47m
Scandinavian Airlines
Deal found 24/2£561
Sun 12/414:37
BOI
-
LHR
1 stop12h 03m
United Airlines
Tue 28/406:50
LHR
-
BOI
2 stops23h 07m
United Airlines
Deal found 21/2£604
Sun 26/413:52
BOI
-
LHR
1 stop15h 18m
Delta
Fri 8/511:45
LHR
-
BOI
2 stops17h 28m
Delta
Deal found 22/2£605
Wed 15/412:52
BOI
-
LHR
2 stops17h 23m
Delta
Thu 30/406:30
LHR
-
BOI
2 stops16h 44m
Delta
Deal found 21/2£608
Sat 25/419:03
BOI
-
LHR
1 stop29h 22m
United Airlines
Tue 12/506:50
LHR
-
BOI
2 stops22h 55m
United Airlines
Deal found 23/2£608
Sat 25/414:18
BOI
-
LHR
1 stop33h 07m
Delta
Thu 7/506:30
LHR
-
BOI
2 stops21h 04m
Delta
Deal found 22/2£610
Mon 27/406:15
BOI
-
LHR
2 stops20h 45m
Air Canada
Fri 8/515:05
LHR
-
BOI
2 stops32h 43m
Air Canada
Deal found 22/2£611

Find flight deals from Boise to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Heathrow (LHR). 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 25 February 2026.

Round-trip from

£518

One-way from

£256

Popular in

January

Cheapest in

April

Average price

£598
Finnair
  • Finnair
  • 20/4-1/5
  • 2 total stops
  • 29h 30m total
  • Boise to London
Search Deals
17/4
  • 17/4
  • 3 total stops
  • 39h 21m total
  • Boise to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£88 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Boise to Heathrow 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 25 February 2026.
Use the filters below to find and compare flights from Boise to London Heathrow Airport that are best for you.

Fly from

Boise

Fly to

Heathrow

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 10/5

12:15-15:35

1 stop20h 20m

London Heathrow

Thu 21/5

11:45-22:13

2 stops17h 28m

£605

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Mon 17/8

16:05-15:35

1 stop16h 30m

London Heathrow

Thu 17/9

11:15-22:32

1 stop18h 17m

£625

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 7/4

09:26-11:10

1 stop18h 44m

London Heathrow

Fri 17/4

06:50-22:57

2 stops23h 07m

£626

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 7/4

13:45-13:05

2 stops16h 20m

London Heathrow

Fri 17/4

06:30-16:14

2 stops16h 44m

£630

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Mon 13/4

10:35-09:40

1 stop16h 05m

London Heathrow

Tue 21/4

14:50-21:22

1 stop13h 32m

£648

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 10/4

05:00-09:40

1 stop21h 40m

London Heathrow

Fri 17/4

14:10-11:49

2 stops28h 39m

£674

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 8/5

15:14-13:05

2 stops14h 51m

London Heathrow

Wed 3/6

09:55-20:32

2 stops17h 37m

£676

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 13/8

17:22-12:20

1 stop11h 58m

London Heathrow

Sat 22/8

10:50-23:05

2 stops19h 15m

£679

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 1/5

12:30-11:10

1 stop15h 40m

London Heathrow

Sat 9/5

10:50-22:35

2 stops18h 45m

£679

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 20/5

08:02-10:10

1 stop19h 08m

London Heathrow

Mon 1/6

16:25-22:37

2 stops37h 12m

£694

Flights are sorted by cheapest return flights first.

Deals found on 21/2

Showing 1-10 of 20 results
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Best time to book a flight from Boise to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Boise 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 Boise to London Heathrow Airport

What is the cheapest month to book a flight from Boise to London Heathrow Airport?

Currently, October is the cheapest month in which you can book a flight from Boise to London Heathrow Airport (average of £461). Flying from Boise to London Heathrow Airport in June is currently the most expensive (average of £804). 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.

How much does it cost for a return flight from Boise to London Heathrow Airport?

Related info for your journey

Find useful and relevant information for your journey from Boise to Heathrow. 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 Boise to London Heathrow?

    Boise Air Term. Gowen Fld (BOI) is the airport you will fly out of if you book a flight from Boise to London Heathrow. You should not have trouble finding flights to London Heathrow from Air Term. Gowen Fld; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Boise airport to London Heathrow. It is only a 3.3 mi journey to Air Term. Gowen Fld (BOI) from Boise’s city center.

  • How long is the flight from Boise to London Heathrow Airport?

    Delta, KLM, and United Airlines can get you from Boise to London Heathrow Airport in just under 16h 30m. Your travel time can differ by up to 3h 50m. Boise and London Heathrow Airport are separated by a distance of 4829 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Boise to Heathrow that include hotel bookings?

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

  • How can I find direct flights from Boise to Heathrow?

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

  • Can I find deals for business class flights from Boise to Heathrow?

    Yes. Cheapflights offers flight deals from Boise to Heathrow 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 Boise to London Heathrow Airport?

    Currently, October is the cheapest month in which you can book a flight from Boise to London Heathrow Airport (average of £461). Flying from Boise to London Heathrow Airport in June is currently the most expensive (average of £804). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Wembley
Luton
Northampton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Kingston upon Thames
Eastbourne
Ipswich
Chelmsford
Swindon
Bedford

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Alternative routes for Boise to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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How does Cheapflights help users find flights from Boise to Heathrow?

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 Heathrow from Boise today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Boise to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Boise to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Boise to Heathrow with no change fees?

Certainly. Search results for flights to Heathrow from Boise shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Boise to Heathrow become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from Boise today and book when prices fit your budget.

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