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$333+ Cheap flights from London (LON) to Idaho

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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from London to Idaho

Keep the following information in mind while searching for London to Idaho flight deals. Data was last updated April 17, 2025.

Round-trip from

$685
(Kiwi.com)

One-way from

$333
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$898
From London (LON) to Idaho
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One-way flight from London (LON) to Idaho
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Highest demand for flights based on searches. 17% potential increase in price ($199 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 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 London to Idaho

Cheapest flights from London to Idaho
Explore the most affordable flight options available from London to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2210:45 amLGW - GEG
1 stop38h 28mMultiple Airlines
Sun 5/253:02 pmGEG - LGW
2 stops35h 53mMultiple Airlines
Deal found 4/16$685
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.
Fri 11/211:35 pmLHR - BOI
2 stops30h 55mUnited Airlines
Sun 11/306:48 amBOI - LHR
1 stop17h 37mUnited Airlines
Deal found 4/17$744
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/64:15 pmLHR - JAC
2 stops28h 28mUnited Airlines
Sat 9/2010:51 amJAC - LHR
1 stop18h 29mUnited Airlines
Deal found 4/16$828
This TravelUp 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 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 4/17$840
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/211:05 pmLHR - GEG
2 stops18h 54mIcelandair
Tue 10/2811:35 amGEG - LHR
2 stops16h 15mIcelandair
Deal found 4/16$867
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/246:15 amLHR - GEG
2 stops16h 30mDelta
Thu 7/35:35 pmGEG - LHR
1 stop12h 40mDelta
Deal found 4/16$868
This Virgin Atlantic 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/241:25 pmLHR - GEG
1 stop15h 42mVirgin Atlantic
Thu 7/311:42 amGEG - LHR
1 stop17h 28mVirgin Atlantic
Deal found 4/16$880
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/218:45 amLHR - GEG
2 stops22h 30mUnited Airlines
Tue 10/2811:40 amGEG - LHR
1 stop13h 15mUnited Airlines
Deal found 4/16$890
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/212:50 pmLHR - GEG
1 stop13h 42mMultiple Airlines
Tue 10/282:05 pmGEG - LHR
1 stop14h 55mMultiple Airlines
Deal found 4/16$902
This TravelUp 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/29:20 amLCY - BOI
2 stops18h 13mVirgin Atlantic
Tue 5/63:30 pmBOI - LCY
2 stops18h 10mVirgin Atlantic
Deal found 4/16$918
This The Travel House 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/188:30 amLHR - BOI
2 stops21h 22mLufthansa
Mon 6/232:35 pmBOI - LHR
2 stops32h 45mLufthansa
Deal found 4/17$934
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/218:45 amLCY - GEG
2 stops22h 30mLufthansa
Tue 10/282:05 pmGEG - LCY
2 stops20h 35mLufthansa
Deal found 4/16$936

Cheapflights Fare Finder

Customize your flight search to find flights from London 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 17, 2025.
Use the filters below to find and compare flights from London to Idaho that are best for you.

Fly from

London

Fly to

Idaho

Route

Depart

Return

Price

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Thu 5/22

10:45 am-5:13 pm

1 stop38h 28m

Spokane

Sun 5/25

3:02 pm-10:55 am

2 stops35h 53m

$685

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 6/1

2:50 pm-3:59 pm

2 stops32h 09m

Boise Air Term. Gowen Fld

Sun 6/8

7:07 pm-7:25 am

1 stop29h 18m

$761

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Sat 9/6

4:15 pm-1:43 pm

2 stops28h 28m

Jackson Hole

Sat 9/20

10:51 am-12:20 pm

1 stop18h 29m

$828

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

$840

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 6/24

6:15 am-2:45 pm

2 stops16h 30m

Spokane

Thu 7/3

6:50 am-6:25 am

2 stops15h 35m

$868

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 6/24

1:25 pm-9:07 pm

1 stop15h 42m

Spokane

Thu 7/3

11:42 am-1:10 pm

1 stop17h 28m

$880

LondonBoise

LCY - BOI

LCYBOI

London City

Fri 5/2

9:20 am-8:33 pm

2 stops18h 13m

Boise Air Term. Gowen Fld

Tue 5/6

3:30 pm-4:40 pm

2 stops18h 10m

$918

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 6/18

8:30 am-10:52 pm

2 stops21h 22m

Boise Air Term. Gowen Fld

Mon 6/23

2:35 pm-6:20 am

2 stops32h 45m

$934

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 6/1

6:50 am-9:56 pm

2 stops23h 06m

Spokane

Sun 6/8

3:29 pm-7:25 am

1 stop31h 56m

$942

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 5/7

1:25 pm-10:36 pm

1 stop16h 11m

Idaho Falls Fanning Field

Tue 5/20

4:20 pm-2:15 pm

1 stop14h 55m

$951

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 54 results
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Best time to book a flight from London to Idaho

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

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

Currently, October is the cheapest month in which you can book a flight from London to Idaho (average of $314). Flying from London 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 17, 2025.
Read through reviews of airlines operating flights from London to Idaho, such as Delta, KLM and Finnair. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
7,916 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
1,327 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
1,269 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
SWISS
7.5
Good
1,580 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

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
8,667 reviews
Delta
8.0
Very good
7,916 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

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 London 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 London to Idaho one-way?

    $671 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Lufthansa and Icelandair, with prices starting from $826 and $986, respectively.

  • What are the most popular routes from London to Idaho?

    When deciding which route to take from London to Idaho consider London Heathrow - Spokane, London Heathrow - Boise Air Term. Gowen Fld or London Gatwick - Boise Air Term. Gowen Fld as they are the most popular.

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

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

  • How can I find direct flights from London to Idaho?

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

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

    Yes. Cheapflights offers flight deals from London 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 London to Idaho?

    Currently, October is the cheapest month in which you can book a flight from London to Idaho (average of $314). Flying from London 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 London to Idaho

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