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$242+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$609
(KLM)

One-way from

$242
(Norse)

Popular in

June

Cheapest in

October

Average price

$1,232
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. 24% potential increase in price ($291 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This KLM deal was found by Cheapflights users on 7/30. 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 8/242:21 pmGEG - LHR
1 stop14h 49mKLM
Tue 9/96:30 amLHR - GEG
2 stops16h 15mKLM
Deal found 7/30$609
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/22:42 pmBOI - LHR
1 stop14h 38mUnited Airlines
Thu 9/115:40 pmLHR - BOI
2 stops26h 55mUnited Airlines
Deal found 7/30$613
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/178:00 amBOI - LGW
2 stops19h 55mMultiple Airlines
Mon 9/229:50 amLGW - BOI
1 stop20h 04mMultiple Airlines
Deal found 7/30$621
This Air France deal was found by Cheapflights users on 7/27. 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.
Sun 8/32:22 pmGEG - LHR
1 stop14h 48mMultiple Airlines
Tue 8/1910:55 amLHR - GEG
1 stop13h 18mMultiple Airlines
Deal found 7/27$621
This Delta deal was found by Cheapflights users on 7/29. 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.
Sun 9/145:45 amBOI - LHR
1 stop22h 35mDelta
Wed 10/86:15 amLHR - BOI
2 stops16h 51mDelta
Deal found 7/29$622
This Delta deal was found by Cheapflights users on 7/29. 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 10/19:15 amGEG - LHR
1 stop18h 05mDelta
Tue 10/76:15 amLHR - GEG
2 stops18h 29mDelta
Deal found 7/29$622
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/239:52 amBOI - LHR
2 stops16h 43mAir Canada
Wed 10/18:30 amLHR - BOI
2 stops21h 00mAir Canada
Deal found 7/29$627
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/15:15 amGEG - LHR
1 stop20h 25mUnited Airlines
Fri 9/122:05 pmLHR - GEG
2 stops29h 22mUnited Airlines
Deal found 7/30$627
This KLM deal was found by Cheapflights users on 7/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/143:20 pmBOI - LHR
1 stop14h 50mKLM
Wed 10/811:00 amLHR - BOI
1 stop17h 51mKLM
Deal found 7/29$629
This FlightHub deal was found by Cheapflights users on 7/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/285:10 amGEG - LHR
2 stops19h 00mAir Canada
Thu 11/66:00 pmLHR - GEG
2 stops37h 29mAir Canada
Deal found 7/28$636
This Lufthansa deal was found by Cheapflights users on 7/28. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/282:31 pmBOI - LHR
2 stops19h 19mLufthansa
Wed 11/59:30 amLHR - BOI
2 stops18h 51mLufthansa
Deal found 7/28$654
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:00 pmBOI - LHR
2 stops28h 30mMultiple Airlines
Sat 12/67:40 amLHR - BOI
2 stops19h 03mMultiple Airlines
Deal found 7/29$662

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 July 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

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 8/24

2:21 pm-1:10 pm

1 stop14h 49m

London Heathrow

Tue 9/9

6:30 am-2:45 pm

2 stops16h 15m

$609

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 10/14

2:39 pm-12:20 pm

1 stop14h 41m

London Heathrow

Fri 10/24

4:00 pm-1:33 pm

2 stops28h 33m

$613

BoiseLondon

BOI - LGW

BOILGW

Boise Air Term. Gowen Fld

Wed 9/17

8:00 am-10:55 am

2 stops19h 55m

London Gatwick

Mon 9/22

9:50 am-10:54 pm

1 stop20h 04m

$621

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/23

3:20 pm-1:10 pm

1 stop14h 50m

London Heathrow

Wed 10/1

11:30 am-11:57 pm

2 stops19h 27m

$621

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 8/3

2:22 pm-1:10 pm

1 stop14h 48m

London Heathrow

Tue 8/19

10:55 am-4:13 pm

1 stop13h 18m

$621

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 10/1

9:15 am-11:20 am

1 stop18h 05m

London Heathrow

Tue 10/7

6:15 am-4:44 pm

2 stops18h 29m

$622

LewistonLondon

LWS - LHR

LWSLHR

Lewiston Nez Perce Rgnl

Mon 1/5

7:05 am-11:00 am

1 stop19h 55m

London Heathrow

Tue 3/10

6:30 am-9:02 pm

2 stops21h 32m

$623

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/23

9:52 am-9:35 am

2 stops16h 43m

London Heathrow

Wed 10/1

8:30 am-10:30 pm

2 stops21h 00m

$627

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 9/1

5:15 am-9:40 am

1 stop20h 25m

London Heathrow

Fri 9/12

2:05 pm-11:27 am

2 stops29h 22m

$627

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/23

7:00 am-6:25 am

1 stop16h 25m

London Heathrow

Wed 10/1

10:30 am-9:48 pm

1 stop18h 18m

$629

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 $1,097). 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 July 30, 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.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to United Kingdom. Reviews last updated July 30, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Finnair from Idaho to the United Kingdom to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $359. Air Canada flights start at $394 while deals on United Airlines start at $399 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 $1,097). 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$555Average$774FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$644Average$940FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$679Average$1,045FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$703Average$926FlexibilityNo cancel feeOn-time71%
DeltaCheapest$723Average$1,011FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$1,097Average$1,354FlexibilityNo cancel feeOn-time76%

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