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$278+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$605
(Kiwi.com)

One-way from

$278
(Norse)

Popular in

June

Cheapest in

October

Average price

$1,417
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. 22% potential increase in price ($273 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 June 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 June 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:25 amGEG - LGW
1 stop19h 05mMultiple Airlines
Wed 10/810:55 amLGW - GEG
1 stop19h 32mMultiple Airlines
Deal found 6/11$605
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/158:18 amBOI - LGW
1 stop19h 37mMultiple Airlines
Mon 8/252:00 pmLGW - BOI
2 stops40h 59mMultiple Airlines
Deal found 6/11$614
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Sun 9/288:20 amBOI - EDI
1 stop17h 05mUnited Airlines
Wed 10/2211:30 amEDI - BOI
1 stop14h 17mUnited Airlines
Deal found 6/12$687
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3011:20 amGEG - EDI
1 stop13h 05mUnited Airlines
Wed 10/89:40 amEDI - GEG
2 stops21h 35mUnited Airlines
Deal found 6/10$692
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/83:05 pmBOI - LHR
2 stops20h 25mScandinavian Airlines
Fri 10/1710:20 amLHR - BOI
2 stops19h 44mScandinavian Airlines
Deal found 6/10$702
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/121:00 pmGEG - LHR
2 stops36h 20mScandinavian Airlines
Fri 9/266:40 amLHR - GEG
2 stops18h 17mScandinavian Airlines
Deal found 6/10$719
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2010:45 amBOI - EDI
2 stops18h 20mDelta
Sun 9/142:05 pmEDI - BOI
2 stops17h 12mDelta
Deal found 6/12$722
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/305:46 pmGEG - GLA
2 stops17h 54mMultiple Airlines
Wed 10/85:50 amGLA - GEG
2 stops19h 09mMultiple Airlines
Deal found 6/12$726
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/96:20 amBOI - LHR
2 stops22h 30mAir Canada
Fri 11/212:30 pmLHR - BOI
2 stops30h 14mAir Canada
Deal found 6/11$728
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/195:15 amGEG - LHR
1 stop23h 05mUnited Airlines
Fri 8/299:30 amLHR - GEG
2 stops33h 57mUnited Airlines
Deal found 6/11$728
This Iberia deal was found by Cheapflights users on 6/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:21 amBOI - LHR
1 stop17h 54mIberia
Wed 11/197:25 amLHR - BOI
2 stops20h 53mIberia
Deal found 6/11$733
This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/711:25 amGEG - LHR
2 stops59h 05mMultiple Airlines
Tue 11/187:40 amLHR - GEG
2 stops21h 05mMultiple Airlines
Deal found 6/11$733

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 June 12, 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 - LGW

GEGLGW

Spokane

Mon 9/29

6:25 am-9:30 am

1 stop19h 05m

London Gatwick

Wed 10/8

10:55 am-10:27 pm

1 stop19h 32m

$605

BoiseLondon

BOI - LGW

BOILGW

Boise Air Term. Gowen Fld

Fri 8/15

8:18 am-10:55 am

1 stop19h 37m

London Gatwick

Mon 8/25

2:00 pm-11:59 pm

2 stops40h 59m

$614

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Sun 9/28

8:20 am-8:25 am

1 stop17h 05m

Edinburgh Turnhouse

Wed 10/22

11:30 am-6:47 pm

1 stop14h 17m

$687

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Sun 9/28

1:43 pm-12:05 pm

1 stop15h 22m

Edinburgh Turnhouse

Wed 10/22

9:00 am-12:17 am

2 stops22h 17m

$692

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Tue 9/30

11:20 am-8:25 am

1 stop13h 05m

Edinburgh Turnhouse

Wed 10/8

9:40 am-11:15 pm

2 stops21h 35m

$692

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 10/8

3:05 pm-6:30 pm

2 stops20h 25m

London Heathrow

Fri 10/17

10:20 am-11:04 pm

2 stops19h 44m

$702

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 9/12

1:00 pm-9:20 am

2 stops36h 20m

London Heathrow

Fri 9/26

6:40 am-4:57 pm

2 stops18h 17m

$719

SpokaneGlasgow

GEG - GLA

GEGGLA

Spokane

Tue 9/30

5:46 pm-7:40 pm

2 stops17h 54m

Glasgow Intl

Wed 10/8

5:50 am-4:59 pm

2 stops19h 09m

$726

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 11/9

6:20 am-11:50 am

2 stops22h 30m

London Heathrow

Fri 11/21

2:30 pm-1:44 pm

2 stops30h 14m

$728

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 8/19

5:15 am-12:20 pm

1 stop23h 05m

London Heathrow

Fri 8/29

9:30 am-11:27 am

2 stops33h 57m

$728

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 $1,108). 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 June 12, 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.

Rainfall in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in United Kingdom ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit United Kingdom when rainfall is around 1.6 in.

Temperature in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average temperature totals by month.

If weather is an important factor for your trip to United Kingdom, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines and KLM from Idaho to 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
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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
1,290 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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 American Airlines, which is currently one of the cheapest options available, starting at $439. Air Canada flights start at $450 while deals on KLM start at $468 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 $1,108). 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

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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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Baltimore to Heathrow flights
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Boston to Lisbon flights
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$555Average$774FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$685Average$1,061FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$687Average$948FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$695Average$996FlexibilityNo cancel feeOn-time72%
DeltaCheapest$723Average$1,010FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$1,097Average$1,354FlexibilityNo cancel feeOn-time76%

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