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Idaho

$482+ Cheap flights from London (LON) 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.
LON — BOI
loka 16 — loka 231
to 10/16
to 10/23
1 adult, Economy
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Cheap flight deals from London to Idaho

Keep the following information in mind while searching for London to Idaho flight deals. Data was last updated syyskuu 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 (LON) to Idaho
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One-way flight from London (LON) 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 London to Idaho

Cheapest flights from London to Idaho
Explore the most affordable flight options available from London to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on syyskuu 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ti 10/289:30 amLHR - GEG
2 stops20h 59mUnited Airlines
ti 11/45:10 amGEG - LHR
1 stop20h 30mUnited Airlines
Deal found 9/13$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.
to 10/3011:35 amLHR - GEG
1 stop16h 10mMultiple Airlines
to 11/612:45 pmGEG - LHR
1 stop34h 40mMultiple Airlines
Deal found 9/15$655
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.
to 10/309:40 amLCY - GEG
2 stops32h 02mMultiple Airlines
to 11/612:45 pmGEG - LCY
2 stops20h 55mMultiple Airlines
Deal found 9/15$675
This Norse 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
pe 10/1710:55 amLGW - GEG
1 stop19h 41mMultiple Airlines
ti 10/211:52 pmGEG - LGW
1 stop37h 03mMultiple Airlines
Deal found 9/15$694
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ti 9/303:05 pmLGW - BOI
2 stops37h 43mAmerican Airlines
la 10/111:35 pmBOI - LGW
2 stops59h 35mAmerican Airlines
Deal found 9/14$723
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ti 9/303:05 pmLGW - BOI
2 stops52h 22mAmerican Airlines
ti 10/144:40 pmBOI - LGW
2 stops56h 30mAmerican Airlines
Deal found 9/14$726
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.
pe 11/216:35 amLHR - BOI
2 stops34h 23mUnited Airlines
su 11/302:40 pmBOI - LHR
1 stop33h 45mUnited Airlines
Deal found 9/15$733
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ti 10/287:30 amLHR - BOI
2 stops20h 06mUnited Airlines
ti 11/48:25 amBOI - LHR
2 stops17h 00mUnited Airlines
Deal found 9/13$735
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ke 11/128:30 amLHR - BOI
2 stops19h 51mLufthansa
ke 12/32:49 pmBOI - LHR
1 stop11h 51mLufthansa
Deal found 9/14$736
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.
to 11/206:50 amLHR - BOI
2 stops22h 55mUnited Airlines
ke 11/262:31 pmBOI - LHR
1 stop12h 09mUnited Airlines
Deal found 9/14$737
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ke 11/511:10 amLHR - BOI
2 stops18h 35mUnited Airlines
ke 11/128:17 amBOI - LHR
1 stop16h 38mUnited Airlines
Deal found 9/13$741
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ma 12/84:40 pmLHR - BOI
2 stops34h 03mUnited Airlines
ma 12/156:35 amBOI - LHR
1 stop17h 50mUnited Airlines
Deal found 9/13$743

Cheapflights Fare Finder

 
Customize your flight search to find flights from London 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 syyskuu 16, 2025.
Use the filters below to find and compare flights from London to Idaho that are best for you.

Fly from

London

Fly to

Idaho

Route

Depart

Return

Price

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ke 10/29

7:30 am-8:45 pm

2 stops20h 15m

Spokane

ke 11/5

6:00 am-1:30 pm

2 stops23h 30m

$634

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ma 2/23

7:30 am-9:09 pm

2 stops21h 39m

Spokane

pe 2/27

5:00 am-9:10 am

2 stops20h 10m

$634

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ti 10/28

9:30 am-11:29 pm

2 stops20h 59m

Spokane

ti 11/4

5:10 am-8:25 am

2 stops19h 15m

$634

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

to 10/30

1:30 pm-11:31 am

2 stops29h 01m

Spokane

to 11/6

12:45 pm-12:00 pm

1 stop15h 15m

$634

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ti 3/10

4:40 pm-9:24 pm

2 stops35h 44m

Spokane

ti 3/17

5:00 am-11:15 am

2 stops23h 15m

$641

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

to 10/30

11:35 am-8:45 pm

1 stop16h 10m

Spokane

to 11/6

12:45 pm-7:25 am

1 stop34h 40m

$655

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ti 3/10

11:10 am-9:09 pm

2 stops40h 59m

Spokane

ti 3/17

1:45 pm-11:15 am

2 stops14h 30m

$659

LondonSpokane

LCY - GEG

LCYGEG

London City

to 10/30

9:40 am-10:42 am

2 stops32h 02m

Spokane

to 11/6

12:45 pm-5:40 pm

2 stops20h 55m

$675

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

pe 10/17

10:55 am-10:36 pm

1 stop19h 41m

Spokane

ti 10/21

1:52 pm-10:55 am

1 stop37h 03m

$694

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

ti 9/30

3:05 pm-12:27 pm

2 stops52h 22m

Boise Air Term. Gowen Fld

ti 10/14

4:40 pm-8:10 am

2 stops56h 30m

$726

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 52 results
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Best time to book a flight from London to Idaho

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

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

Currently, October is the cheapest month in which you can book a flight from London to Idaho (average of $314). Flying from London 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.

How much does it cost to fly round-trip from London to Idaho?

Related info for your journey

Find useful and relevant information for your journey from London 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 to Idaho?

    A quick flight from London to Idaho can take about 18h 17m. United Airlines provides one of the quickest options available for as low as $793. Airlines will cover 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 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 $581 and $670, respectively.

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

    When deciding which route to take from London to Idaho consider London Heathrow - Boise Air Term. Gowen Fld, London Gatwick - Boise Air Term. Gowen Fld or London City - Boise Air Term. Gowen Fld as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 to Idaho?

    Currently, October is the cheapest month in which you can book a flight from London to Idaho (average of $314). Flying from London 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 London to Idaho

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