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Cheap flights from Boise to London Heathrow Airport from £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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
20 Dec — 27 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Boise Air Term. Gowen Fld to London Heathrow are usually found in April or February, booked 8 days in advance, depart on a Monday or Tuesday and return on a Wednesday

Cheap 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 20 November 2025.

Round-trip from

£467

One-way from

£399

Popular in

June

Cheapest in

April

Average price

£845
Lufthansa
  • Lufthansa
  • 14/1-22/1
  • 3 total stops
  • 34h 28m total
  • Boise to London
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KLM
  • KLM
  • 12/3
  • 1 total stop
  • 14h 30m total
  • Boise to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£120 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 November 2025
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Find 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 20 November 2025.

Sun 23/1111:42BOI - LHR
1 stop15h 48mVirgin Atlantic
Tue 2/1214:45LHR - BOI
1 stop14h 31mVirgin Atlantic
Deal found 17/11£494
Fri 5/1212:16BOI - LHR
1 stop15h 59mUnited Airlines
Tue 9/1206:35LHR - BOI
2 stops18h 32mUnited Airlines
Deal found 17/11£509
Fri 5/1212:55BOI - LHR
1 stop14h 05mVirgin Atlantic
Tue 9/1212:20LHR - BOI
1 stop15h 00mVirgin Atlantic
Deal found 17/11£532
Sun 23/1106:15BOI - LHR
2 stops42h 15mUnited Airlines
Tue 2/1215:30LHR - BOI
2 stops33h 37mUnited Airlines
Deal found 17/11£574
Tue 16/1205:35BOI - LHR
1 stop18h 30mMultiple Airlines
Wed 14/106:30LHR - BOI
2 stops16h 52mMultiple Airlines
Deal found 18/11£607
Tue 16/1205:50BOI - LHR
2 stops18h 15mDelta
Wed 14/106:30LHR - BOI
2 stops16h 47mDelta
Deal found 17/11£610
Fri 5/1206:20BOI - LHR
2 stops19h 10mAir Canada
Tue 9/1211:10LHR - BOI
2 stops32h 07mAir Canada
Deal found 17/11£618

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 20 November 2025.
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

Wed 14/1

12:19-11:15

1 stop15h 56m

London Heathrow

Thu 22/1

06:35-18:07

2 stops18h 32m

£467

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

14:40-09:40

1 stop12h 00m

London Heathrow

Tue 24/2

07:30-21:32

2 stops21h 02m

£474

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

17:10-09:40

1 stop33h 30m

London Heathrow

Tue 24/2

11:10-23:23

2 stops19h 13m

£478

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

11:19-10:00

1 stop15h 41m

London Heathrow

Fri 27/2

06:30-16:05

2 stops16h 35m

£478

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/1

14:37-07:10

2 stops33h 33m

London Heathrow

Tue 27/1

13:25-12:39

2 stops30h 14m

£478

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/1

10:39-12:50

1 stop19h 11m

London Heathrow

Tue 27/1

06:30-16:17

2 stops16h 47m

£478

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/1

08:15-07:55

1 stop16h 40m

London Heathrow

Tue 27/1

06:35-18:07

2 stops18h 32m

£478

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

05:00-05:55

2 stops17h 55m

London Heathrow

Fri 27/2

11:10-23:48

2 stops19h 38m

£481

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 12/3

14:00-10:30

1 stop14h 30m

£399

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 12/3

07:07-12:00

2 stops22h 53m

£399

Flights are sorted by cheapest return flights first.

Deals found on 19/11

Showing 1-10 of 12 results
1
2

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

How far ahead should I book a flight from Boise to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from Boise to Heathrow. Price data was last updated on 14 November 2025.

To ensure you get the cheapest price possible for a flight from Boise to London Heathrow Airport, you should look to book at least 7 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, July is the cheapest month in which you can book a flight from Boise to London Heathrow Airport (average of £466). Flying from Boise to London Heathrow Airport in June is currently the most expensive (average of £828). 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 BOI to LHR?

Find hourly flight availability from Boise to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 November 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 43% on flights from Boise to London Heathrow Airport by exploring options for tickets in the evening.

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?

    Lufthansa, United Airlines, and KLM can get you from Boise to London Heathrow Airport in just under 15h 41m. Your travel time can differ by up to 17h 49m. 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, July is the cheapest month in which you can book a flight from Boise to London Heathrow Airport (average of £466). Flying from Boise to London Heathrow Airport in June is currently the most expensive (average of £828). 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
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

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Alternative routes for Boise to Heathrow

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

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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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