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$304+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$626
(Expedia)

One-way from

$304
(Norse)

Popular in

June

Cheapest in

November

Average price

$804
Provider with most accurate pricing for Boise Air Term. Gowen Fld-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-London (LON) flights.
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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. 26% potential increase in price ($325 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This Expedia deal was found by Cheapflights users on 4/17. 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.
Tue 10/143:05 pmBOI - LHR
2 stops19h 35mScandinavian Airlines
Tue 10/217:30 pmLHR - BOI
2 stops30h 01mScandinavian Airlines
Deal found 4/17$626
This Kiwi.com deal was found by Cheapflights users on 4/17. 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.
Sun 5/47:00 amGEG - LGW
1 stop19h 55mMultiple Airlines
Wed 5/1410:55 amLGW - GEG
1 stop19h 34mMultiple Airlines
Deal found 4/17$686
This Gurufare deal was found by Cheapflights users on 4/17. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/171:00 pmGEG - LHR
2 stops19h 00mScandinavian Airlines
Sun 8/246:40 pmLHR - GEG
2 stops30h 19mScandinavian Airlines
Deal found 4/17$705
This United Airlines deal was found by Cheapflights users on 4/15. 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 5/1410:53 amIDA - LHR
1 stop15h 47mUnited Airlines
Wed 5/212:05 pmLHR - IDA
2 stops39h 46mUnited Airlines
Deal found 4/15$720
This Virgin Atlantic deal was found by Cheapflights users on 4/15. 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 5/1412:30 pmIDA - LHR
2 stops19h 05mVirgin Atlantic
Wed 5/2111:45 amLHR - IDA
2 stops18h 06mVirgin Atlantic
Deal found 4/15$722
This Mytrip deal was found by Cheapflights users on 4/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1912:16 pmBOI - LGW
2 stops35h 44mMultiple Airlines
Thu 5/2910:45 amLGW - BOI
2 stops31h 36mMultiple Airlines
Deal found 4/16$735
This Expedia deal was found by Cheapflights users on 4/17. 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.
Tue 10/141:41 pmBOI - LHR
1 stop14h 09mIberia
Tue 10/2112:00 pmLHR - BOI
1 stop16h 12mIberia
Deal found 4/17$746
This United Airlines deal was found by Cheapflights users on 4/17. 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 04mUnited Airlines
Deal found 4/17$749
This Delta deal was found by Cheapflights users on 4/17. 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 9/281:43 pmBOI - EDI
1 stop15h 22mDelta
Wed 10/229:00 amEDI - BOI
2 stops21h 38mDelta
Deal found 4/17$754
This Travelocity deal was found by Cheapflights users on 4/17. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/511:21 amGEG - LHR
2 stops16h 29mMultiple Airlines
Sun 9/218:05 pmLHR - GEG
2 stops32h 24mMultiple Airlines
Deal found 4/17$756
This United Airlines deal was found by Cheapflights users on 4/17. 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 11/47:00 amGEG - LHR
1 stop16h 25mUnited Airlines
Tue 11/182:30 pmLHR - GEG
2 stops28h 25mUnited Airlines
Deal found 4/17$763
This Booking.com deal was found by Cheapflights users on 4/17. 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 9/55:39 pmBOI - LHR
2 stops53h 51mAir Canada
Fri 9/192:05 pmLHR - BOI
2 stops30h 25mAir Canada
Deal found 4/17$769

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 April 17, 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 10/14

3:05 pm-5:40 pm

2 stops19h 35m

London Heathrow

Tue 10/21

7:30 pm-6:31 pm

2 stops30h 01m

$626

SpokaneLondon

GEG - LGW

GEGLGW

Spokane

Sun 5/4

7:00 am-10:55 am

1 stop19h 55m

London Gatwick

Wed 5/14

10:55 am-10:29 pm

1 stop19h 34m

$686

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 8/17

1:00 pm-4:00 pm

2 stops19h 00m

London Heathrow

Sun 8/24

6:40 pm-4:59 pm

2 stops30h 19m

$705

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 5/14

10:53 am-9:40 am

1 stop15h 47m

London Heathrow

Wed 5/21

2:05 pm-10:51 pm

2 stops39h 46m

$720

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 5/14

12:30 pm-2:35 pm

2 stops19h 05m

London Heathrow

Wed 5/21

11:45 am-10:51 pm

2 stops18h 06m

$722

BoiseLondon

BOI - LGW

BOILGW

Boise Air Term. Gowen Fld

Mon 5/19

12:16 pm-7:00 am

2 stops35h 44m

London Gatwick

Thu 5/29

10:45 am-11:21 am

2 stops31h 36m

$735

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 10/14

1:41 pm-10:50 am

1 stop14h 09m

London Heathrow

Tue 10/21

12:00 pm-9:12 pm

1 stop16h 12m

$746

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-6:34 pm

1 stop14h 04m

$749

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-11:38 pm

2 stops21h 38m

$754

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 9/5

11:21 am-11:50 am

2 stops16h 29m

London Heathrow

Sun 9/21

8:05 pm-8:29 pm

2 stops32h 24m

$756

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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 $1,110). 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 April 17, 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 April 17, 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
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Alaska Airlines
8.0
Very good
9,882 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,329 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 Air Canada, which is currently one of the cheapest options available, starting at $478. Delta flights start at $483 while deals on American Airlines start at $483 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 $1,110). 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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LaGuardia to Charles de Gaulle flights
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O'Hare Intl to Charles de Gaulle flights
Seattle to Heathrow flights
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LaGuardia to Leonardo da Vinci/Fiumicino flights
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LaGuardia to Athens flights
Boston to Leonardo da Vinci/Fiumicino flights
Newark to Frankfurt flights
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Boston to Athens flights
Dallas/Fort Worth to Charles de Gaulle flights

Top 5 airlines flying from Idaho to United Kingdom

Discover the top 5 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$648Average$917FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$687Average$1,154FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$695Average$885FlexibilityNo cancel feeOn-time72%
DeltaCheapest$723Average$1,142FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$1,072Average$1,354FlexibilityNo cancel feeOn-time76%

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