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$502+ Cheap flights from Heathrow (LHR) to Idaho

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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap flight deals from Heathrow to Idaho

Keep the following information in mind while searching for Heathrow to Idaho flight deals. Data was last updated November 6, 2025.

Round-trip from

$628
(Trip.com)

One-way from

$502
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$860
From London Heathrow to Idaho
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One-way flight from London Heathrow to Idaho
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Highest demand for flights based on searches. 14% potential increase in price ($160 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Heathrow to Idaho

Cheapest flights from Heathrow to Idaho
Explore the most affordable flight options available from Heathrow to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:35 amLHR - BOI
2 stops34h 24mUnited Airlines
Mon 12/159:40 amBOI - LHR
1 stop17h 00mUnited Airlines
Deal found 11/6$720
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:30 amLHR - BOI
2 stops19h 13mUnited Airlines
Mon 12/156:20 amBOI - LHR
2 stops17h 20mUnited Airlines
Deal found 11/6$723
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:35 amLHR - BOI
2 stops18h 32mUnited Airlines
Sun 12/145:25 pmBOI - LHR
1 stop33h 15mUnited Airlines
Deal found 11/6$731
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:35 amLHR - BOI
1 stop13h 32mLufthansa
Mon 12/152:49 pmBOI - LHR
1 stop11h 51mLufthansa
Deal found 11/6$736
This The Travel House deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/97:40 amLHR - BOI
2 stops17h 27mLufthansa
Sun 12/142:49 pmBOI - LHR
2 stops37h 01mLufthansa
Deal found 11/5$750
This Cheapflightsfares deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2010:05 amLHR - GEG
1 stop18h 50mIberia
Wed 12/35:17 amGEG - LHR
1 stop17h 33mIberia
Deal found 11/5$908
This Virgin Atlantic deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/201:05 pmLHR - GEG
2 stops18h 54mVirgin Atlantic
Wed 12/36:00 amGEG - LHR
2 stops17h 50mVirgin Atlantic
Deal found 11/5$916
This Expedia deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/228:35 pmLHR - SUN
2 stops44h 02mMultiple Airlines
Tue 12/910:50 amSUN - LHR
2 stops17h 00mMultiple Airlines
Deal found 11/6$928
This KLM deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/238:25 pmLHR - SUN
2 stops25h 15mKLM
Tue 12/91:06 pmSUN - LHR
1 stop13h 54mKLM
Deal found 11/6$957
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:20 amLHR - SUN
2 stops22h 39mDelta
Tue 12/97:30 amSUN - LHR
2 stops18h 15mDelta
Deal found 11/6$962
This TravelUp deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2211:15 amLHR - SUN
2 stops41h 44mVirgin Atlantic
Tue 12/93:21 pmSUN - LHR
1 stop11h 39mVirgin Atlantic
Deal found 11/6$965
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:45 amLHR - SUN
1 stop34h 55mDelta
Sun 12/73:21 pmSUN - LHR
2 stops32h 04mDelta
Deal found 11/6$974

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to Idaho 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 2,558,603 searches. Data last updated November 6, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Idaho that are best for you.

Fly from

Heathrow

Fly to

Idaho

Route

Depart

Return

Price

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 12/9

6:35 am-9:59 am

2 stops34h 24m

Boise Air Term. Gowen Fld

Mon 12/15

9:40 am-9:40 am

1 stop17h 00m

$720

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 12/8

6:30 am-7:43 pm

2 stops20h 13m

Boise Air Term. Gowen Fld

Mon 12/15

10:40 am-9:40 am

1 stop16h 00m

$723

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

6:35 am-9:20 pm

2 stops21h 45m

Spokane

Tue 3/17

6:05 am-6:20 am

2 stops17h 15m

$728

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

6:30 am-7:51 pm

2 stops20h 21m

Boise Air Term. Gowen Fld

Wed 2/18

10:53 am-7:25 am

1 stop13h 32m

$731

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

6:30 am-7:51 pm

2 stops20h 21m

Boise Air Term. Gowen Fld

Tue 2/17

2:40 pm-9:40 am

1 stop12h 00m

$731

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 12/9

6:35 am-6:07 pm

2 stops18h 32m

Boise Air Term. Gowen Fld

Sun 12/14

5:25 pm-9:40 am

1 stop33h 15m

$731

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

6:30 am-7:51 pm

2 stops20h 21m

Boise Air Term. Gowen Fld

Sun 2/15

12:16 pm-5:55 am

1 stop34h 39m

$743

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 4/20

7:25 am-7:16 pm

2 stops18h 51m

Boise Air Term. Gowen Fld

Thu 4/30

2:11 pm-12:20 pm

2 stops15h 09m

$744

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 5/4

8:45 am-11:38 pm

2 stops22h 53m

Spokane

Sun 5/10

7:02 am-2:10 pm

1 stop23h 08m

$779

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 3/13

11:10 am-12:40 pm

2 stops32h 30m

Spokane

Fri 3/27

6:30 pm-5:30 am

2 stops28h 00m

$808

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 58 results
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Best time to book a flight from Heathrow to Idaho

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

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

Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of $723). Flying from London Heathrow Airport to Idaho in July is currently the most expensive (average of $905). 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.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    United Airlines, KLM, and Delta can get you from London Heathrow Airport to Idaho in just under 22h 39m. Your travel time can differ by up to 11h 45m. London Heathrow Airport and Idaho are separated by a distance of 4774 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from London Heathrow Airport to Idaho one-way?

    $567 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Virgin Atlantic and American Airlines, with prices starting from $743 and $932, respectively.

  • What are the most popular routes from London Heathrow Airport to Idaho?

    While some choose either London Heathrow - Spokane or London Heathrow - Hailey Sun Valley-Friedman, London Heathrow - Boise Air Term. Gowen Fld is the most popular route from London Heathrow Airport to Idaho.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Idaho 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 Heathrow Airport to Idaho?

    Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of $723). Flying from London Heathrow Airport to Idaho in July is currently the most expensive (average of $905). 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

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Alternative routes for Heathrow to Idaho

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