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$612+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
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 13, 2025.

Round-trip from

$727
(United Airlines)

One-way from

$612
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$850
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. 12% potential increase in price ($144 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 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 13, 2025.

This United Airlines deal was found by Cheapflights users on 11/11. 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
Mon 12/156:20 amBOI - LHR
1 stop20h 20mUnited Airlines
Deal found 11/11$727
This United Airlines deal was found by Cheapflights users on 11/11. 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 11/11$737
This Kiwi.com deal was found by Cheapflights users on 11/11. 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.
Tue 12/911:35 amLHR - BOI
1 stop13h 32mLufthansa
Mon 12/152:49 pmBOI - LHR
1 stop11h 51mLufthansa
Deal found 11/11$738
This The Travel House deal was found by Cheapflights users on 11/11. 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 11/11$755
This Justfly.com deal was found by Cheapflights users on 11/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:35 amLHR - BOI
1 stop15h 08mLufthansa
Mon 12/1510:40 amBOI - LHR
1 stop16h 00mLufthansa
Deal found 11/11$807
This Delta deal was found by Cheapflights users on 11/11. 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 12/86:30 amLHR - GEG
2 stops21h 40mDelta
Tue 12/239:16 amGEG - LHR
1 stop19h 34mDelta
Deal found 11/11$866
This Cheapflightsfares deal was found by Cheapflights users on 11/13. 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 12/117:40 amLHR - BOI
2 stops17h 27mLufthansa
Fri 1/912:19 pmBOI - LHR
1 stop12h 36mLufthansa
Deal found 11/13$879
This Justfly.com deal was found by Cheapflights users on 11/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/81:25 pmLHR - BOI
2 stops40h 20mAir Canada
Mon 12/159:40 amBOI - LHR
2 stops18h 40mAir Canada
Deal found 11/11$881
This Expedia deal was found by Cheapflights users on 11/12. 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
Sat 12/610:50 amSUN - LHR
2 stops25h 40mMultiple Airlines
Deal found 11/12$961
This Expedia deal was found by Cheapflights users on 11/12. 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.
Mon 12/292:45 pmLHR - GEG
1 stop14h 30mVirgin Atlantic
Mon 1/51:15 pmGEG - LHR
2 stops35h 30mVirgin Atlantic
Deal found 11/12$991
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 12/88:30 amLHR - JAC
2 stops19h 07mLufthansa
Mon 12/152:49 pmJAC - LHR
1 stop11h 51mLufthansa
Deal found 11/12$1,060
This United Airlines deal was found by Cheapflights users on 11/12. 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 - JAC
2 stops20h 07mUnited Airlines
Mon 12/1512:02 pmJAC - LHR
2 stops15h 23mUnited Airlines
Deal found 11/12$1,092

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 13, 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-6:07 pm

2 stops18h 32m

Boise Air Term. Gowen Fld

Mon 12/15

6:20 am-9:40 am

1 stop20h 20m

$727

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

6:35 am-9:20 pm

2 stops21h 45m

Spokane

Tue 3/17

5:00 am-6:20 am

2 stops18h 20m

$732

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 12/9

11:35 am-6:07 pm

1 stop13h 32m

Boise Air Term. Gowen Fld

Mon 12/15

2:49 pm-9:40 am

1 stop11h 51m

$738

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 4/20

9:00 am-9:54 am

2 stops31h 54m

Boise Air Term. Gowen Fld

Mon 4/27

2:40 pm-12:20 pm

1 stop14h 40m

$751

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 4/29

10:50 am-10:35 pm

2 stops18h 45m

Boise Air Term. Gowen Fld

Sun 5/3

2:11 pm-10:10 am

1 stop36h 59m

$760

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 2/11

10:05 am-9:23 pm

1 stop18h 18m

Boise Air Term. Gowen Fld

Wed 2/18

6:25 am-9:40 am

1 stop20h 15m

$765

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

10:25 am-10:57 pm

1 stop19h 32m

Boise Air Term. Gowen Fld

Tue 2/17

10:53 am-7:25 am

1 stop13h 32m

$765

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

1:45 pm-9:23 pm

1 stop14h 38m

Boise Air Term. Gowen Fld

Wed 2/18

12:16 pm-7:55 am

1 stop12h 39m

$765

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 2/10

11:35 am-6:07 pm

1 stop13h 32m

Boise Air Term. Gowen Fld

Wed 2/18

2:40 pm-9:40 am

1 stop12h 00m

$765

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

1:45 pm-9:23 pm

1 stop14h 38m

Boise Air Term. Gowen Fld

Thu 2/19

10:25 am-9:40 am

1 stop16h 15m

$769

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 47 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 $722). Flying from London Heathrow Airport to Idaho in December is currently the most expensive (average of $969). 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 to fly round-trip from London Heathrow Airport to Idaho?

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, Lufthansa, and Virgin Atlantic can get you from London Heathrow Airport to Idaho in just under 13h 32m. Your travel time can differ by up to 19h 24m. London Heathrow Airport and Idaho are separated by a distance of 4829 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?

    $651 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Finnair and Delta, with prices starting from $928 and $966, respectively.

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

    While some choose either London Heathrow - Spokane or London Heathrow - Jackson Hole, 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 $722). Flying from London Heathrow Airport to Idaho in December is currently the most expensive (average of $969). 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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