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$289+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This Air France deal was found by Cheapflights users on 10/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:30 amJAC - LHR
1 stop19h 30mMultiple Airlines
Tue 11/116:20 amLHR - JAC
2 stops17h 50mMultiple Airlines
Deal found 10/28$591
This Delta deal was found by Cheapflights users on 10/29. 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.
Wed 11/59:22 amGEG - LHR
1 stop17h 08mDelta
Wed 11/196:20 amLHR - GEG
2 stops20h 13mDelta
Deal found 10/29$591
This Virgin Atlantic deal was found by Cheapflights users on 10/29. 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.
Tue 12/25:35 amBOI - LHR
1 stop18h 30mVirgin Atlantic
Tue 12/96:20 amLHR - BOI
2 stops19h 31mVirgin Atlantic
Deal found 10/29$592
This Delta deal was found by Cheapflights users on 10/29. 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.
Wed 11/1911:42 amBOI - LHR
1 stop15h 48mDelta
Wed 11/268:40 amLHR - BOI
2 stops20h 47mDelta
Deal found 10/29$593
This Delta deal was found by Cheapflights users on 10/29. 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.
Wed 11/126:00 amGEG - LHR
1 stop20h 00mDelta
Wed 11/266:30 amLHR - GEG
2 stops21h 33mDelta
Deal found 10/29$593
This Delta deal was found by Cheapflights users on 10/29. 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.
Wed 11/126:00 amGEG - LHR
2 stops19h 00mDelta
Wed 12/36:30 amLHR - GEG
2 stops21h 40mDelta
Deal found 10/29$597
This Air France deal was found by Cheapflights users on 10/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:30 amJAC - LHR
1 stop19h 30mMultiple Airlines
Wed 11/1210:45 amLHR - JAC
1 stop13h 25mMultiple Airlines
Deal found 10/28$599
This Delta deal was found by Cheapflights users on 10/29. 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.
Sat 11/153:33 pmGEG - LHR
2 stops20h 37mDelta
Wed 11/2612:20 pmLHR - GEG
1 stop16h 41mDelta
Deal found 10/29$604
This Delta deal was found by Cheapflights users on 10/30. 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.
Thu 11/277:05 amGEG - LHR
1 stop19h 25mDelta
Thu 12/46:20 amLHR - GEG
2 stops17h 20mDelta
Deal found 10/30$616
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/115:10 amGEG - LHR
2 stops18h 00mUnited Airlines
Tue 11/256:35 amLHR - GEG
2 stops24h 54mUnited Airlines
Deal found 10/29$619
This KLM deal was found by Cheapflights users on 10/30. 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.
Sun 12/71:12 pmGEG - LHR
1 stop14h 28mKLM
Sun 12/1411:05 amLHR - GEG
1 stop17h 05mKLM
Deal found 10/30$624
This Air Canada deal was found by Cheapflights users on 10/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/79:40 amBOI - LHR
2 stops18h 40mAir Canada
Sun 12/141:25 pmLHR - BOI
2 stops40h 20mAir Canada
Deal found 10/30$632

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$570
(Netflights)

One-way from

$289
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$662
Provider with most accurate pricing for Boise Air Term. Gowen Fld-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-London (LON) flights.
Search Deals
From Idaho to United Kingdom
Search Deals
One-way flight from Idaho to United Kingdom
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($283 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 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

Tue 2/17

1:43 pm-11:40 am

1 stop14h 57m

London Heathrow

Thu 2/26

6:20 am-4:26 pm

2 stops17h 06m

$588

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 11/5

7:30 am-10:00 am

1 stop19h 30m

London Heathrow

Tue 11/11

6:20 am-5:10 pm

2 stops17h 50m

$591

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 11/5

7:30 am-10:00 am

1 stop19h 30m

London Heathrow

Wed 11/12

6:20 am-5:10 pm

2 stops17h 50m

$591

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 12/2

5:35 am-7:05 am

1 stop18h 30m

London Heathrow

Tue 12/9

6:20 am-6:51 pm

2 stops19h 31m

$592

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/12

7:05 am-10:30 am

1 stop19h 25m

London Heathrow

Wed 12/3

6:30 am-8:10 pm

2 stops21h 40m

$593

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 12/2

9:00 am-10:30 am

1 stop18h 30m

London Heathrow

Tue 12/9

12:20 pm-6:51 pm

1 stop13h 31m

$599

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 2/17

1:00 pm-12:50 pm

1 stop15h 50m

London Heathrow

Wed 3/4

6:20 am-6:46 pm

2 stops20h 26m

$599

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 2/18

9:10 am-10:30 am

1 stop17h 20m

London Heathrow

Thu 3/5

6:20 am-2:42 pm

2 stops16h 22m

$600

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

5:40 am-7:05 am

2 stops18h 25m

London Heathrow

Tue 2/24

6:20 am-4:26 pm

2 stops17h 06m

$604

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Mon 1/12

1:00 pm-11:40 am

2 stops15h 40m

London Heathrow

Sun 1/18

6:30 am-8:12 pm

2 stops20h 42m

$609

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 44 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, July is the cheapest month in which you can book a flight from Idaho to United Kingdom (average of $611). Flying from Idaho to United Kingdom in June is currently the most expensive (average of $1,085). 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 October 30, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 16% on flights from Idaho to United Kingdom by exploring options for tickets at noon.

What is the cheapest day to fly from Idaho to United Kingdom?

Use this chart to determine the cheapest time to fly round-trip from Idaho to United Kingdom. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Idaho to United Kingdom flight should consider departing on Sunday mornings when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 18h 30m. Virgin Atlantic provides one of the quickest options available for as low as $592. 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 New Zealand, which is currently one of the cheapest options available, starting at $397. United Airlines flights start at $399 while deals on American Airlines start at $432 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, July is the cheapest month in which you can book a flight from Idaho to United Kingdom (average of $611). Flying from Idaho to United Kingdom in June is currently the most expensive (average of $1,085). 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 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$577Average$774FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$639Average$1,030FlexibilityNo cancel feeOn-time69%
DeltaCheapest$672Average$978FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$695Average$881FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$703Average$1,092FlexibilityNo cancel feeOn-time71%
IcelandairCheapest$1,162Average$1,354FlexibilityNo cancel feeOn-time76%

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