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$482+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$632
(United Airlines)

One-way from

$482
(Thrive Travel)

Popular in

July

Cheapest in

February

Average price

$818
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. 13% potential increase in price ($152 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 September 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 September 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 10/306:35 amLHR - GEG
2 stops37h 10mUnited Airlines
Thu 11/65:10 amGEG - LHR
1 stop20h 30mUnited Airlines
Deal found 9/15$632
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/297:30 amLHR - GEG
2 stops20h 15mUnited Airlines
Wed 11/56:00 amGEG - LHR
1 stop22h 00mUnited Airlines
Deal found 9/14$634
This TravelUp deal was found by Cheapflights users on 9/15. 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.
Thu 10/3011:35 amLHR - GEG
1 stop16h 10mMultiple Airlines
Thu 11/612:45 pmGEG - LHR
1 stop34h 40mMultiple Airlines
Deal found 9/15$655
This TravelUp deal was found by Cheapflights users on 9/16. 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.
Sun 10/510:35 amLHR - GEG
1 stop20h 40mMultiple Airlines
Fri 10/177:15 amGEG - LHR
1 stop16h 10mMultiple Airlines
Deal found 9/16$657
This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:30 amLHR - BOI
2 stops21h 38mMultiple Airlines
Mon 11/108:41 amBOI - LHR
1 stop18h 59mMultiple Airlines
Deal found 9/15$664
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/512:20 pmLHR - GEG
1 stop18h 55mUnited Airlines
Fri 10/175:05 amGEG - LHR
2 stops20h 15mUnited Airlines
Deal found 9/16$665
This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/711:15 amLHR - BOI
2 stops18h 50mMultiple Airlines
Tue 10/143:37 pmBOI - LHR
1 stop17h 03mMultiple Airlines
Deal found 9/15$673
This TravelUp deal was found by Cheapflights users on 9/16. 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.
Fri 10/316:35 amLHR - BOI
2 stops45h 01mLufthansa
Fri 11/72:31 pmBOI - LHR
1 stop12h 09mLufthansa
Deal found 9/16$725
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/88:25 amLHR - BOI
2 stops20h 57mAmerican Airlines
Tue 10/147:00 amBOI - LHR
1 stop22h 45mAmerican Airlines
Deal found 9/15$727
This TravelUp deal was found by Cheapflights users on 9/16. 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.
Sun 10/52:30 pmLHR - GEG
2 stops17h 33mVirgin Atlantic
Fri 10/172:17 pmGEG - LHR
2 stops21h 43mVirgin Atlantic
Deal found 9/16$732
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 11/216:35 amLHR - BOI
2 stops34h 23mUnited Airlines
Sun 11/302:40 pmBOI - LHR
1 stop33h 45mUnited Airlines
Deal found 9/15$733
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/3111:10 amLHR - BOI
2 stops28h 48mUnited Airlines
Fri 11/72:40 pmBOI - LHR
2 stops33h 30mUnited Airlines
Deal found 9/16$735

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 September 16, 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

Thu 10/30

6:35 am-12:45 pm

2 stops37h 10m

Spokane

Thu 11/6

5:10 am-9:40 am

1 stop20h 30m

$632

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

6:35 am-1:09 pm

2 stops37h 34m

Spokane

Tue 3/17

2:05 pm-12:00 pm

1 stop14h 55m

$633

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 10/29

7:30 am-8:45 pm

2 stops20h 15m

Spokane

Wed 11/5

6:00 am-1:30 pm

2 stops23h 30m

$634

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 2/23

7:30 am-9:09 pm

2 stops21h 39m

Spokane

Fri 2/27

5:00 am-9:10 am

2 stops20h 10m

$634

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 10/30

11:35 am-8:45 pm

1 stop16h 10m

Spokane

Thu 11/6

12:45 pm-7:25 am

1 stop34h 40m

$655

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 10/5

10:35 am-11:15 pm

1 stop20h 40m

Spokane

Fri 10/17

7:15 am-7:25 am

1 stop16h 10m

$657

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

7:40 am-9:09 pm

2 stops20h 29m

Spokane

Tue 3/17

1:45 pm-10:50 am

2 stops38h 05m

$661

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 11/21

6:35 am-10:45 pm

2 stops23h 10m

Boise Air Term. Gowen Fld

Sun 11/30

5:00 am-9:40 am

1 stop21h 40m

$733

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 3/6

6:35 am-11:05 pm

2 stops23h 30m

Boise Air Term. Gowen Fld

Tue 3/10

6:48 am-7:25 am

1 stop18h 37m

$733

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

10:35 am-12:00 pm

1 stop18h 25m

$733

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, 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 $398). 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, Lufthansa, and Virgin Atlantic can get you from London Heathrow Airport to Idaho in just under 18h 17m. Your travel time can differ by up to 18h 53m. 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?

    $482 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on Lufthansa and Delta, with prices starting from $624 and $670, respectively.

  • 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 $398). 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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