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Idaho

$727+ Cheap flights from Heathrow (LHR) to Idaho

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
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 10, 2025.

Round-trip from

$727
(United Airlines)

Popular in

July

Cheapest in

September

Average price

$850
From London Heathrow to Idaho
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($144 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
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 10, 2025.

This United Airlines deal was found by Cheapflights users on 11/10. 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 12/87:40 amLHR - BOI
2 stops33h 19mUnited Airlines
Mon 12/159:40 amBOI - LHR
2 stops18h 10mUnited Airlines
Deal found 11/10$727
This United Airlines deal was found by Cheapflights users on 11/10. 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 11/10$738
This The Travel House deal was found by Cheapflights users on 11/9. 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 11/9$751
This Flightnetwork deal was found by Cheapflights users on 11/9. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/102:30 pmLHR - BOI
2 stops40h 14mMultiple Airlines
Tue 12/162:49 pmBOI - LHR
2 stops34h 06mMultiple Airlines
Deal found 11/9$783
This Flightnetwork deal was found by Cheapflights users on 11/9. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1011:35 amLHR - BOI
1 stop13h 32mLufthansa
Tue 12/162:49 pmBOI - LHR
2 stops34h 06mLufthansa
Deal found 11/9$802
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Sun 12/710:05 amLHR - BOI
1 stop20h 39mUnited Airlines
Sun 12/147:11 pmBOI - LHR
2 stops31h 29mUnited Airlines
Deal found 11/9$811
This Gotogate deal was found by Cheapflights users on 11/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/71:25 pmLHR - BOI
2 stops27h 34mMultiple Airlines
Sun 12/142:49 pmBOI - LHR
2 stops32h 51mMultiple Airlines
Deal found 11/9$818
This Netflights deal was found by Cheapflights users on 11/9. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:20 amLHR - GEG
2 stops22h 36mVirgin Atlantic
Tue 12/163:35 pmGEG - LHR
2 stops31h 15mVirgin Atlantic
Deal found 11/9$825
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Wed 12/1011:35 amLHR - BOI
1 stop13h 32mUnited Airlines
Tue 12/161:50 pmBOI - LHR
1 stop16h 40mUnited Airlines
Deal found 11/9$872
This United Airlines deal was found by Cheapflights users on 11/10. 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 12/87:40 amLHR - BOI
2 stops33h 19mUnited Airlines
Tue 12/162:49 pmBOI - LHR
1 stop11h 51mUnited Airlines
Deal found 11/10$874
This Delta deal was found by Cheapflights users on 11/7. 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.
Sat 11/226:20 amLHR - IDA
2 stops18h 57mDelta
Wed 11/266:57 pmIDA - LHR
2 stops29h 53mDelta
Deal found 11/7$1,009
This TravelUp deal was found by Cheapflights users on 11/9. 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.
Tue 12/99:30 amLHR - JAC
2 stops18h 07mLufthansa
Tue 12/162:49 pmJAC - LHR
1 stop11h 51mLufthansa
Deal found 11/9$1,062

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 10, 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

10:40 am-10:50 am

2 stops17h 10m

$727

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 12/8

7:40 am-9:59 am

2 stops33h 19m

Boise Air Term. Gowen Fld

Mon 12/15

9:40 am-10:50 am

2 stops18h 10m

$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-5:55 am

2 stops17h 55m

$733

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

$738

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 5/6

8:45 am-11:38 pm

2 stops22h 53m

Spokane

Mon 5/11

1:45 pm-12:20 pm

1 stop14h 35m

$746

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 5/6

11:25 am-9:09 pm

1 stop17h 44m

Spokane

Mon 5/11

7:02 am-2:10 pm

1 stop23h 08m

$772

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 1/12

7:40 am-7:16 pm

2 stops19h 36m

Spokane

Sat 1/24

11:25 am-10:50 am

2 stops15h 25m

$774

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

6:20 am-6:17 pm

2 stops18h 57m

Idaho Falls Fanning Field

Wed 11/26

6:57 pm-7:50 am

2 stops29h 53m

$1,009

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Sat 1/10

6:20 am-9:55 pm

2 stops22h 35m

Hailey Sun Valley-Friedman

Sat 1/17

12:43 pm-10:00 am

1 stop14h 17m

$1,042

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Sat 1/10

10:45 am-9:55 pm

1 stop18h 10m

Hailey Sun Valley-Friedman

Sat 1/17

12:43 pm-10:00 am

1 stop14h 17m

$1,052

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 35 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.

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, Delta, and Virgin Atlantic can get you from London Heathrow Airport to Idaho in just under 18h 57m. Your travel time can differ by up to 15h 27m. London Heathrow Airport and Idaho are separated by a distance of 4705 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?

    $1,087 is the cheapest one-way deal found within the past few days, from Virgin Atlantic. You may also be able to find cheap deals on Air France and Lufthansa, with prices starting from $1,112 and $1,237, 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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