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$619+ Cheap flights from the United Kingdom to Idaho

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
1 adult, Economy
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Cheap flight deals from United Kingdom to Idaho

Keep the following information in mind while searching for United Kingdom to Idaho flight deals. Data was last updated April 2, 2025.

Round-trip from

$619
(United Airlines)

Popular in

August

Cheapest in

November

Average price

$884
From United Kingdom to Idaho
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($202 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from United Kingdom to Idaho

Cheapest flights from United Kingdom to Idaho
Explore the most affordable flight options available from United Kingdom to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2025.

This United Airlines deal was found by Cheapflights users on 4/1. 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.
Fri 5/1612:20 pmLHR - BOI
2 stops31h 19mUnited Airlines
Fri 5/2310:45 amBOI - LHR
1 stop16h 40mUnited Airlines
Deal found 4/1$619
This Trip.com deal was found by Cheapflights users on 4/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1610:55 amLGW - GEG
1 stop19h 27mMultiple Airlines
Sun 5/257:10 amGEG - LGW
1 stop19h 45mMultiple Airlines
Deal found 4/1$733
This United Airlines deal was found by Cheapflights users on 3/31. 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 5/68:45 amLCY - BOI
3 stops21h 07mMultiple Airlines
Tue 5/1311:02 amBOI - LCY
2 stops22h 23mMultiple Airlines
Deal found 3/31$762
This Air Canada deal was found by Cheapflights users on 4/1. 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.
Tue 5/69:30 amLHR - BOI
2 stops19h 12mMultiple Airlines
Tue 5/135:00 amBOI - LHR
3 stops18h 35mMultiple Airlines
Deal found 4/1$769
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Fri 5/168:40 amLHR - GEG
2 stops22h 58mUnited Airlines
Fri 5/236:20 amGEG - LHR
1 stop20h 05mUnited Airlines
Deal found 4/1$791
This EaseMyTrip deal was found by Cheapflights users on 4/1. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/161:25 pmLHR - GEG
1 stop13h 20mVirgin Atlantic
Sun 5/255:40 pmGEG - LHR
1 stop33h 40mVirgin Atlantic
Deal found 4/1$801
This United Airlines deal was found by Cheapflights users on 4/2. 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 9/1712:20 pmLHR - JAC
2 stops32h 23mUnited Airlines
Sat 9/271:28 pmJAC - LHR
2 stops15h 17mUnited Airlines
Deal found 4/2$811
This EaseMyTrip deal was found by Cheapflights users on 4/1. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/711:00 amLHR - IDA
1 stop14h 10mVirgin Atlantic
Tue 5/2012:30 pmIDA - LHR
2 stops19h 05mVirgin Atlantic
Deal found 4/1$818
This TravelUp deal was found by Cheapflights users on 4/1. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/711:45 amLHR - IDA
2 stops18h 06mKLM
Tue 5/2012:30 pmIDA - LHR
2 stops18h 45mKLM
Deal found 4/1$820
This KLM deal was found by Cheapflights users on 4/1. 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.
Tue 4/2210:55 amLHR - BOI
1 stop13h 08mKLM
Fri 5/22:15 pmBOI - LHR
1 stop13h 55mKLM
Deal found 4/1$839
This The Travel House deal was found by Cheapflights users on 4/1. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/212:20 pmLHR - BOI
1 stop15h 34mIberia
Wed 9/247:30 amBOI - LHR
2 stops31h 55mIberia
Deal found 4/1$845
This ChecknFly deal was found by Cheapflights users on 4/1. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2812:20 pmLHR - BOI
2 stops58h 35mLufthansa
Mon 7/74:40 pmBOI - LHR
1 stop35h 30mLufthansa
Deal found 4/1$860

Cheapflights Fare Finder

Customize your flight search to find flights from United Kingdom to Idaho 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 2, 2025.
Use the filters below to find and compare flights from the United Kingdom to Idaho that are best for you.

Fly from

United Kingdom

Fly to

Idaho

Route

Depart

Return

Price

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 5/16

4:15 pm-12:39 pm

2 stops27h 24m

Boise Air Term. Gowen Fld

Fri 5/23

7:50 am-11:10 am

2 stops20h 20m

$619

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Fri 5/16

10:55 am-10:22 pm

1 stop19h 27m

Spokane

Sun 5/25

7:10 am-10:55 am

1 stop19h 45m

$733

LondonBoise

LCY - BOI

LCYBOI

London City

Tue 5/6

8:45 am-10:52 pm

3 stops21h 07m

Boise Air Term. Gowen Fld

Tue 5/13

11:02 am-4:25 pm

2 stops22h 23m

$762

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 5/6

9:30 am-9:42 pm

2 stops19h 12m

Boise Air Term. Gowen Fld

Tue 5/13

5:00 am-6:35 am

3 stops18h 35m

$769

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 5/16

8:40 am-11:38 pm

2 stops22h 58m

Spokane

Fri 5/23

7:00 am-10:40 am

2 stops19h 40m

$791

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 5/16

1:25 pm-6:45 pm

1 stop13h 20m

Spokane

Sun 5/25

5:40 pm-11:20 am

1 stop33h 40m

$801

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Wed 9/17

12:20 pm-1:43 pm

2 stops32h 23m

Jackson Hole

Sat 9/27

1:28 pm-11:45 am

2 stops15h 17m

$811

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 5/7

11:00 am-6:10 pm

1 stop14h 10m

Idaho Falls Fanning Field

Tue 5/20

12:30 pm-2:35 pm

2 stops19h 05m

$818

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 5/7

11:45 am-10:51 pm

2 stops18h 06m

Idaho Falls Fanning Field

Tue 5/20

12:30 pm-2:15 pm

2 stops18h 45m

$820

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 4/22

10:55 am-5:03 pm

1 stop13h 08m

Boise Air Term. Gowen Fld

Fri 5/2

2:15 pm-11:10 am

1 stop13h 55m

$839

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 45 results
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Best time to book a flight from United Kingdom to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from United Kingdom 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 the United Kingdom to Idaho

What is the cheapest month to book a flight from United Kingdom to Idaho?

Currently, October is the cheapest month in which you can book a flight from United Kingdom to Idaho (average of $314). Flying from United Kingdom to Idaho in June is currently the most expensive (average of $419). 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.

Rainfall in Idaho by month

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

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

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

If weather is an important factor for your trip to Idaho, 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 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated April 2, 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair from United Kingdom to Idaho. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.4
Good
1,427 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,615 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Idaho. 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 United Kingdom to Idaho one-way?

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $626. However, be on the lookout for offers from Lufthansa and Icelandair, as they are both options that can get you from United Kingdom to Idaho for a low price.

  • Can I find deals for flights from United Kingdom to Idaho that include hotel bookings?

    Yes. In addition to deals on United Kingdom to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Idaho.

  • Can I find deals for business class flights from United Kingdom to Idaho?

    Yes. Cheapflights offers flight deals from United Kingdom to Idaho 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 United Kingdom to Idaho?

    Currently, October is the cheapest month in which you can book a flight from United Kingdom to Idaho (average of $314). Flying from United Kingdom to Idaho in June is currently the most expensive (average of $419). 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 United Kingdom to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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