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$244+ Cheap flights from Idaho to the United Kingdom

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.
BOI — LHR
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Idaho to United Kingdom

Keep the following information in mind while searching for Idaho to United Kingdom flight deals. Data was last updated septiembre 11, 2025.

Round-trip from

$608
(United Airlines)

One-way from

$244
(Norse)

Popular in

June

Cheapest in

October

Average price

$792
From Idaho to United Kingdom
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One-way flight from Idaho to United Kingdom
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Highest demand for flights based on searches. 23% potential increase in price ($284 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($46 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 Idaho to United Kingdom

Cheapest flights from Idaho to United Kingdom
Explore the most affordable flight options available from Idaho to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/8. 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.
mar. 9/232:42 pmBOI - LHR
1 stop14h 38mUnited Airlines
mié. 10/12:05 pmLHR - BOI
2 stops28h 34mUnited Airlines
Deal found 9/8$606
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/59:45 amGEG - LHR
1 stop16h 15mDelta
mié. 11/196:20 amLHR - GEG
2 stops21h 43mDelta
Deal found 9/9$621
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/231:00 pmBOI - LHR
1 stop13h 50mDelta
mié. 10/16:15 amLHR - BOI
2 stops19h 01mDelta
Deal found 9/10$623
This Delta deal was found by Cheapflights users on 9/11. 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.
mié. 10/13:30 pmGEG - LHR
1 stop14h 45mDelta
mar. 10/79:00 amLHR - GEG
2 stops20h 05mDelta
Deal found 9/11$623
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/1412:51 pmGEG - LHR
1 stop16h 39mDelta
mar. 10/218:40 amLHR - GEG
2 stops18h 03mDelta
Deal found 9/9$624
This KLM deal was found by Cheapflights users on 9/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/233:20 pmBOI - LHR
1 stop14h 50mKLM
mié. 10/111:00 amLHR - BOI
1 stop17h 46mKLM
Deal found 9/8$629
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/215:05 amGEG - LHR
2 stops17h 40mDelta
mar. 12/166:30 amLHR - GEG
2 stops21h 39mDelta
Deal found 9/10$629
This KLM deal was found by Cheapflights users on 9/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/13:30 pmGEG - LHR
1 stop14h 45mKLM
mar. 10/710:55 amLHR - GEG
1 stop15h 30mKLM
Deal found 9/9$630
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/151:15 pmGEG - LHR
1 stop14h 05mDelta
mié. 10/2910:10 amLHR - GEG
2 stops19h 24mDelta
Deal found 9/9$635
This Virgin Atlantic deal was found by Cheapflights users on 9/11. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/35:45 amGEG - LHR
2 stops17h 05mVirgin Atlantic
mar. 11/181:00 pmLHR - GEG
2 stops18h 51mVirgin Atlantic
Deal found 9/11$636
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/16:45 amGEG - MAN
2 stops17h 50mDelta
mié. 10/82:15 pmMAN - GEG
2 stops17h 44mDelta
Deal found 9/9$649
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/16:45 amGEG - MAN
2 stops17h 50mDelta
mar. 10/712:35 pmMAN - GEG
1 stop31h 06mDelta
Deal found 9/10$655

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to United Kingdom 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 septiembre 11, 2025.
Use the filters below to find and compare flights from Idaho to the United Kingdom that are best for you.

Fly from

Idaho

Fly to

United Kingdom

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mar. 9/23

2:42 pm-12:20 pm

1 stop14h 38m

London Heathrow

mié. 10/1

2:05 pm-11:39 am

2 stops28h 34m

$606

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 11/12

7:05 am-10:30 am

1 stop19h 25m

London Heathrow

mié. 12/3

6:20 am-6:56 pm

2 stops20h 36m

$621

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mar. 10/14

12:51 pm-1:30 pm

1 stop16h 39m

London Heathrow

mar. 10/21

8:40 am-6:43 pm

2 stops18h 03m

$624

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 11/5

6:00 am-7:50 am

2 stops17h 50m

London Heathrow

mié. 11/19

6:20 am-8:03 pm

2 stops21h 43m

$626

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mar. 9/23

3:20 pm-1:10 pm

1 stop14h 50m

London Heathrow

mié. 10/1

11:00 am-9:46 pm

1 stop17h 46m

$629

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 10/15

3:37 pm-2:15 pm

1 stop14h 38m

London Heathrow

mié. 10/29

12:20 pm-6:43 pm

1 stop13h 23m

$630

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 10/8

3:37 pm-2:15 pm

1 stop14h 38m

London Heathrow

mié. 10/22

11:00 am-11:43 pm

1 stop20h 43m

$630

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 11/5

5:45 am-7:05 am

1 stop17h 20m

London Heathrow

mié. 11/19

10:45 am-6:33 pm

1 stop15h 48m

$630

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 10/1

3:30 pm-2:15 pm

1 stop14h 45m

London Heathrow

mar. 10/7

10:55 am-6:25 pm

1 stop15h 30m

$630

SpokaneManchester

GEG - MAN

GEGMAN

Spokane

mié. 10/1

6:45 am-8:35 am

2 stops17h 50m

Manchester

mié. 10/8

2:15 pm-11:59 pm

2 stops17h 44m

$650

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to United Kingdom

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

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

Currently, November is the cheapest month in which you can book a flight from Idaho to United Kingdom (average of $661). Flying from Idaho to United Kingdom in June is currently the most expensive (average of $1,098). 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.

What is the cheapest time of day to fly from ID to GB?

Find hourly flight availability from Idaho to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to United Kingdom as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Idaho to United Kingdom. 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 Idaho to United Kingdom?

    A quick flight from Idaho to United Kingdom can take about 14h 38m. United Airlines provides one of the quickest options available for as low as $606. There are 4829 mi between Idaho and United Kingdom. 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 Idaho to United Kingdom one-way?

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at $446. American Airlines flights start at $449 while deals on United Airlines start at $450 one-way.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Idaho to United Kingdom (average of $661). Flying from Idaho to United Kingdom in June is currently the most expensive (average of $1,098). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Idaho to United Kingdom

Discover the top 6 airlines that operate flights from Idaho to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$577Average$774FlexibilityNo cancel feeOn-time75%
DeltaCheapest$672Average$1,051FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$687Average$1,013FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$695Average$977FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$703Average$1,032FlexibilityNo cancel feeOn-time71%
IcelandairCheapest$1,097Average$1,354FlexibilityNo cancel feeOn-time76%

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