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$523+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
ago. 26 — sep. 21
mar. 8/26
mar. 9/2
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 agosto 21, 2025.

Round-trip from

$700
(United Airlines)

One-way from

$523
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$1,175
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 ($158 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 August 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 agosto 21, 2025.

This United Airlines deal was found by Cheapflights users on 8/21. 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.
dom. 10/57:30 amLHR - GEG
2 stops23h 45mUnited Airlines
dom. 10/1212:35 pmGEG - LHR
1 stop17h 35mUnited Airlines
Deal found 8/21$700
This United Airlines deal was found by Cheapflights users on 8/20. 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.
sáb. 9/2011:25 amLHR - GEG
1 stop17h 38mUnited Airlines
vie. 9/2612:35 pmGEG - LHR
1 stop34h 50mUnited Airlines
Deal found 8/20$731
This United Airlines deal was found by Cheapflights users on 8/20. 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.
lun. 12/87:40 amLHR - BOI
2 stops33h 19mUnited Airlines
mar. 12/1610:35 amBOI - LHR
1 stop13h 50mUnited Airlines
Deal found 8/20$745
This United Airlines deal was found by Cheapflights users on 8/20. 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.
mié. 11/58:30 amLHR - BOI
2 stops21h 15mUnited Airlines
lun. 11/102:11 pmBOI - LHR
1 stop16h 19mUnited Airlines
Deal found 8/20$746
This United Airlines deal was found by Cheapflights users on 8/21. 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.
lun. 10/63:50 pmLHR - BOI
2 stops26h 49mUnited Airlines
lun. 10/135:39 pmBOI - LHR
1 stop11h 41mUnited Airlines
Deal found 8/21$783
This TravelUp deal was found by Cheapflights users on 8/21. 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.
sáb. 10/411:05 amLHR - BOI
1 stop14h 42mLufthansa
jue. 10/912:35 pmBOI - LHR
1 stop12h 45mLufthansa
Deal found 8/21$797
This ChecknFly deal was found by Cheapflights users on 8/21. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/264:00 pmLHR - BOI
2 stops26h 39mMultiple Airlines
lun. 10/62:39 pmBOI - LHR
1 stop12h 01mMultiple Airlines
Deal found 8/21$800
This United Airlines deal was found by Cheapflights users on 8/20. 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.
vie. 11/2111:10 amLHR - BOI
2 stops29h 48mUnited Airlines
dom. 11/306:20 amBOI - LHR
1 stop18h 05mUnited Airlines
Deal found 8/20$802
This United Airlines deal was found by Cheapflights users on 8/21. 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.
vie. 9/262:50 pmLHR - BOI
1 stop13h 34mUnited Airlines
lun. 10/62:39 pmBOI - LHR
1 stop12h 01mUnited Airlines
Deal found 8/21$804
This United Airlines deal was found by Cheapflights users on 8/21. 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.
vie. 10/178:30 amLHR - GEG
2 stops22h 45mUnited Airlines
mar. 11/257:00 amGEG - LHR
2 stops22h 30mUnited Airlines
Deal found 8/21$812
This American Airlines deal was found by Cheapflights users on 8/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/222:25 pmLHR - IDA
1 stop15h 09mAmerican Airlines
mié. 11/267:15 amIDA - LHR
2 stops21h 00mAmerican Airlines
Deal found 8/21$864
This Delta deal was found by Cheapflights users on 8/21. 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.
sáb. 11/226:20 amLHR - IDA
2 stops18h 54mDelta
mié. 11/266:05 amIDA - LHR
2 stops18h 00mDelta
Deal found 8/21$871

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 agosto 21, 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

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

dom. 10/5

7:30 am-11:15 pm

2 stops23h 45m

Spokane

dom. 10/12

12:35 pm-2:10 pm

1 stop17h 35m

$700

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

sáb. 9/20

2:50 pm-9:03 pm

1 stop14h 13m

Spokane

vie. 9/26

12:35 pm-11:10 am

2 stops38h 35m

$731

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

sáb. 10/4

10:00 am-8:24 pm

2 stops18h 24m

Spokane

sáb. 10/11

1:38 pm-12:20 pm

1 stop14h 42m

$731

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

lun. 12/8

7:40 am-9:59 am

2 stops33h 19m

Boise Air Term. Gowen Fld

mar. 12/16

10:35 am-7:25 am

1 stop13h 50m

$745

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

mié. 11/5

8:30 am-10:45 pm

2 stops21h 15m

Boise Air Term. Gowen Fld

lun. 11/10

2:11 pm-1:30 pm

1 stop16h 19m

$746

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

lun. 10/6

3:50 pm-11:39 am

2 stops26h 49m

Boise Air Term. Gowen Fld

lun. 10/13

5:39 pm-12:20 pm

1 stop11h 41m

$783

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

sáb. 10/4

11:05 am-6:47 pm

1 stop14h 42m

Boise Air Term. Gowen Fld

jue. 10/9

12:35 pm-8:20 am

1 stop12h 45m

$797

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

vie. 10/17

8:30 am-11:15 pm

2 stops22h 45m

Spokane

mar. 11/25

7:00 am-12:00 pm

1 stop21h 00m

$812

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

sáb. 11/22

2:25 pm-10:34 pm

1 stop15h 09m

Idaho Falls Fanning Field

mié. 11/26

7:15 am-11:15 am

2 stops21h 00m

$864

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

sáb. 11/22

6:20 am-6:14 pm

2 stops18h 54m

Idaho Falls Fanning Field

mié. 11/26

6:05 am-7:05 am

2 stops18h 00m

$871

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 33 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, October is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of $314). Flying from London Heathrow Airport to Idaho in June is currently the most expensive (average of $399). 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, American Airlines, and Delta can get you from London Heathrow Airport to Idaho in just under 15h 09m. Your travel time can differ by up to 8h 36m. 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 most popular routes from London Heathrow Airport to Idaho?

    While some choose either London Heathrow - Jackson Hole or London Heathrow - Spokane, 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, October is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of $314). Flying from London Heathrow Airport to Idaho in June is currently the most expensive (average of $399). 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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