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$399+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap 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 December 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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.
Wed 12/318:20 amBOI - LHR
1 stop14h 35mUnited Airlines
Thu 1/86:00 pmLHR - BOI
2 stops34h 52mUnited Airlines
Deal found 12/15$824
This Virgin Atlantic deal was found by Cheapflights users on 12/15. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:30 amBOI - LHR
1 stop18h 35mVirgin Atlantic
Thu 1/810:45 amLHR - BOI
1 stop19h 27mVirgin Atlantic
Deal found 12/15$841
This Booking.com deal was found by Cheapflights users on 12/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:00 amBOI - LHR
2 stops23h 20mAir Canada
Thu 1/81:25 pmLHR - BOI
2 stops31h 10mAir Canada
Deal found 12/15$842
This KLM deal was found by Cheapflights users on 12/13. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:00 amGEG - MAN
2 stops18h 20mKLM
Tue 1/65:25 pmMAN - GEG
2 stops29h 35mKLM
Deal found 12/13$1,113
This KLM deal was found by Cheapflights users on 12/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/299:16 amGEG - MAN
2 stops19h 29mKLM
Tue 1/65:25 pmMAN - GEG
2 stops29h 35mKLM
Deal found 12/14$1,161
This Icelandair deal was found by Cheapflights users on 12/12. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1611:45 amBOI - LHR
2 stops16h 05mMultiple Airlines
Wed 1/1412:15 pmLHR - BOI
2 stops15h 50mMultiple Airlines
Deal found 12/12$1,164
This Air Canada deal was found by Cheapflights users on 12/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:42 amBOI - LHR
3 stops17h 38mMultiple Airlines
Thu 1/81:25 pmLHR - BOI
2 stops27h 41mMultiple Airlines
Deal found 12/15$1,179
This Delta deal was found by Cheapflights users on 12/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:00 amGEG - LHR
1 stop17h 05mDelta
Tue 1/66:20 amLHR - GEG
2 stops16h 40mDelta
Deal found 12/13$1,469
This Expedia deal was found by Cheapflights users on 12/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:20 amBOI - LCY
2 stops17h 45mMultiple Airlines
Thu 1/89:40 amLCY - BOI
2 stops17h 05mMultiple Airlines
Deal found 12/15$1,491
This Delta deal was found by Cheapflights users on 12/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:33 pmGEG - MAN
1 stop27h 57mDelta
Tue 1/61:00 pmMAN - GEG
2 stops31h 07mDelta
Deal found 12/14$1,501
This Delta deal was found by Cheapflights users on 12/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:30 amBOI - LHR
1 stop18h 35mDelta
Wed 12/316:30 amLHR - BOI
2 stops24h 23mDelta
Deal found 12/13$1,547
This United Airlines deal was found by Cheapflights users on 12/13. 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 12/235:12 pmBOI - LHR
2 stops21h 08mUnited Airlines
Wed 12/316:35 amLHR - BOI
2 stops18h 28mUnited Airlines
Deal found 12/13$1,549

Find 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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$597
(Cheapflightsfares)

One-way from

$399
(United Airlines)

Popular in

June

Cheapest in

October

Average price

$949
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 ($276 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 15, 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

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

7:00 am-12:00 pm

1 stop21h 00m

London Heathrow

Mon 3/9

7:40 am-9:18 pm

2 stops20h 38m

$597

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Sun 1/18

6:30 am-10:15 am

2 stops19h 45m

Edinburgh Turnhouse

Mon 2/2

5:50 am-7:54 pm

2 stops22h 04m

$603

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

1:44 pm-5:05 pm

2 stops19h 21m

London Heathrow

Wed 3/11

6:35 am-9:03 pm

2 stops21h 28m

$605

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Tue 2/24

7:30 am-9:32 pm

2 stops21h 02m

$607

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 2/24

12:38 pm-12:00 pm

1 stop15h 22m

London Heathrow

Tue 3/10

9:30 am-9:18 pm

2 stops18h 48m

$607

SpokaneManchester

GEG - MAN

GEGMAN

Spokane

Tue 2/24

1:44 pm-11:20 pm

2 stops25h 36m

Manchester

Wed 3/11

6:25 am-9:18 pm

2 stops21h 53m

$608

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Tue 2/24

12:55 pm-4:50 pm

2 stops19h 55m

Edinburgh Turnhouse

Thu 3/12

11:25 am-12:23 am

2 stops19h 58m

$611

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Wed 1/28

7:20 am-3:10 pm

2 stops24h 50m

Edinburgh Turnhouse

Wed 2/4

6:35 pm-7:25 pm

2 stops31h 50m

$612

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

7:11 am-1:30 pm

1 stop23h 19m

London Heathrow

Thu 2/26

11:10 am-11:48 pm

2 stops19h 38m

$619

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Fri 1/30

6:10 am-7:55 am

2 stops18h 45m

Edinburgh Turnhouse

Tue 2/3

9:25 am-7:45 pm

2 stops17h 20m

$619

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 58 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 $603). 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 December 15, 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 19h 45m. Lufthansa provides one of the quickest options available for as low as $603. There are 4334 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.

  • 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 $603). 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$577Average$774FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$604Average$915FlexibilityNo cancel feeOn-time72%
DeltaCheapest$627Average$948FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$639Average$1,049FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$703Average$1,193FlexibilityNo cancel feeOn-time71%
IcelandairCheapest$1,162Average$1,354FlexibilityNo cancel feeOn-time76%

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