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$449+ Cheap flights from the United Kingdom 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from United Kingdom to Idaho

Keep the following information in mind while searching for United Kingdom to Idaho flight deals. Data was last updated September 15, 2025.

Round-trip from

$634
(United Airlines)

One-way from

$449
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$818
From United Kingdom to Idaho
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One-way flight from United Kingdom 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 United Kingdom to Idaho

Cheapest flights from United Kingdom to Idaho
Explore the most affordable flight options available from United Kingdom to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 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.
Tue 10/289:30 amLHR - GEG
2 stops20h 59mUnited Airlines
Tue 11/45:10 amGEG - LHR
2 stops19h 15mUnited Airlines
Deal found 9/13$634
This Expedia deal was found by Cheapflights users on 9/12. 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 10/277:30 pmLHR - GEG
2 stops34h 59mLufthansa
Mon 11/312:45 pmGEG - LHR
1 stop15h 15mLufthansa
Deal found 9/12$661
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Fri 9/192:10 pmLHR - GEG
2 stops30h 26mUnited Airlines
Sat 9/271:38 pmGEG - LHR
1 stop12h 02mUnited Airlines
Deal found 9/12$663
This Norse deal was found by Cheapflights users on 9/12. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1710:55 amLGW - GEG
1 stop19h 41mMultiple Airlines
Tue 10/211:52 pmGEG - LGW
1 stop37h 03mMultiple Airlines
Deal found 9/12$711
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.
Tue 9/303:05 pmLGW - BOI
2 stops37h 43mAmerican Airlines
Mon 10/131:26 pmBOI - LGW
2 stops35h 44mAmerican 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.
Tue 9/303:05 pmLGW - BOI
2 stops52h 22mAmerican Airlines
Tue 10/144:40 pmBOI - LGW
2 stops56h 30mAmerican Airlines
Deal found 9/14$726
This The Travel House deal was found by Cheapflights users on 9/12. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/194:40 pmLHR - GEG
2 stops36h 23mLufthansa
Sat 9/277:15 amGEG - LHR
2 stops43h 55mLufthansa
Deal found 9/12$730
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.
Fri 11/216:35 amLHR - BOI
2 stops23h 10mUnited Airlines
Sun 11/306:20 amBOI - LHR
1 stop22h 40mUnited Airlines
Deal found 9/13$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.
Tue 10/287:30 amLHR - BOI
2 stops20h 06mUnited Airlines
Tue 11/42:40 pmBOI - LHR
1 stop14h 20mUnited 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.
Wed 11/128:30 amLHR - BOI
2 stops19h 51mLufthansa
Wed 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.
Thu 11/206:50 amLHR - BOI
2 stops22h 55mUnited Airlines
Wed 11/2610:40 amBOI - LHR
2 stops17h 25mUnited 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.
Wed 11/511:10 amLHR - BOI
2 stops18h 35mUnited Airlines
Wed 11/128:17 amBOI - LHR
1 stop16h 38mUnited Airlines
Deal found 9/13$741

Cheapflights Fare Finder

 
Customize your flight search to find flights from United Kingdom 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 15, 2025.
Use the filters below to find and compare flights from the United Kingdom to Idaho that are best for you.

Fly from

United Kingdom

Fly to

Idaho

Route

Depart

Return

Price

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/28

9:30 am-11:29 pm

2 stops20h 59m

Spokane

Tue 11/4

5:10 am-8:25 am

2 stops19h 15m

$634

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

4:40 pm-9:24 pm

2 stops35h 44m

Spokane

Tue 3/17

5:00 am-11:15 am

2 stops23h 15m

$641

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

11:10 am-9:09 pm

2 stops40h 59m

Spokane

Tue 3/17

1:45 pm-11:15 am

2 stops14h 30m

$658

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 10/27

7:30 pm-11:29 pm

2 stops34h 59m

Spokane

Mon 11/3

12:45 pm-12:00 pm

1 stop15h 15m

$661

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Fri 10/17

10:55 am-10:36 pm

1 stop19h 41m

Spokane

Tue 10/21

1:52 pm-10:55 am

1 stop37h 03m

$711

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Tue 9/30

3:05 pm-12:27 pm

2 stops52h 22m

Boise Air Term. Gowen Fld

Tue 10/14

4:40 pm-8:10 am

2 stops56h 30m

$726

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

6:20 am-12:00 pm

1 stop22h 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

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 10/28

7:30 am-9:36 pm

2 stops20h 06m

Boise Air Term. Gowen Fld

Tue 11/4

2:40 pm-12:00 pm

1 stop14h 20m

$735

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 59 results
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Best time to book a flight from United Kingdom to Idaho

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

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

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

    Departing from United Kingdom to Idaho will take you 20h 59m. The distance between United Kingdom and Idaho is about 4643 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from United Kingdom to Idaho one-way?

    The cheapest airline one-way is Lufthansa, with whom users have recently found tickets for as low as $581. However, be on the lookout for offers from Iberia and KLM, as they are both options that can get you from United Kingdom to Idaho for a low price.

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

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

  • How can I find direct flights from United Kingdom to Idaho?

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to Idaho?

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