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Idaho

$420+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Round-trip from

$589
(United Airlines)

One-way from

$420
(Mytrip)

Popular in

August

Cheapest in

November

Average price

$915
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 ($197 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 28, 2025.

This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/114:15 pmLHR - BOI
2 stops27h 24mUnited Airlines
Sun 5/185:25 pmBOI - LHR
1 stop33h 15mUnited Airlines
Deal found 3/27$589
This TravelUp deal was found by Cheapflights users on 3/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/115:10 pmLHR - GEG
2 stops38h 05mVirgin Atlantic
Sun 5/185:40 pmGEG - LHR
2 stops29h 35mVirgin Atlantic
Deal found 3/27$724
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/216:30 amLHR - GEG
2 stops20h 15mDelta
Mon 5/51:15 pmGEG - LHR
2 stops15h 55mDelta
Deal found 3/27$756
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/118:45 amLHR - GEG
2 stops22h 53mUnited Airlines
Sun 5/183:25 pmGEG - LHR
1 stop35h 00mUnited Airlines
Deal found 3/27$760
This United Airlines deal was found by Cheapflights users on 3/27. 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 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 3/27$763
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/218:20 amLHR - GEG
1 stop21h 18mAmerican Airlines
Mon 5/56:27 amGEG - LHR
1 stop24h 13mAmerican Airlines
Deal found 3/27$769
This Air Canada deal was found by Cheapflights users on 3/27. 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 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 3/27$769
This TravelUp deal was found by Cheapflights users on 3/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1111:20 amLHR - BOI
1 stop18h 29mKLM
Sun 5/187:45 amBOI - LHR
1 stop19h 15mKLM
Deal found 3/27$801
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/14:15 pmLHR - JAC
2 stops28h 28mUnited Airlines
Mon 9/153:00 pmJAC - LHR
2 stops33h 25mUnited Airlines
Deal found 3/27$810
This ChecknFly deal was found by Cheapflights users on 3/27. 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 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 3/27$893
This Gurufare deal was found by Cheapflights users on 3/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/61:00 pmLGW - BOI
2 stops16h 39mIcelandair
Tue 5/134:20 pmBOI - LGW
2 stops15h 20mIcelandair
Deal found 3/27$900
This Norse deal was found by Cheapflights users on 3/27. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1110:55 amLGW - BOI
1 stop32h 47mMultiple Airlines
Sun 5/185:51 pmBOI - LGW
1 stop34h 04mMultiple Airlines
Deal found 3/27$909

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 March 28, 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

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 5/11

4:15 pm-12:39 pm

2 stops27h 24m

Boise Air Term. Gowen Fld

Sun 5/18

5:25 pm-9:40 am

1 stop33h 15m

$589

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 5/11

5:10 pm-11:15 pm

2 stops38h 05m

Spokane

Sun 5/18

5:40 pm-7:15 am

2 stops29h 35m

$724

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/21

6:30 am-6:45 pm

2 stops20h 15m

Spokane

Mon 5/5

1:15 pm-1:10 pm

2 stops15h 55m

$756

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 5/11

8:45 am-11:38 pm

2 stops22h 53m

Spokane

Sun 5/18

3:25 pm-10:25 am

1 stop35h 00m

$760

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

$763

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/21

8:20 am-9:38 pm

1 stop21h 18m

Spokane

Mon 5/5

6:27 am-2:40 pm

1 stop24h 13m

$769

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

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 5/11

11:20 am-10:49 pm

1 stop18h 29m

Boise Air Term. Gowen Fld

Sun 5/18

7:45 am-10:00 am

1 stop19h 15m

$801

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Mon 9/1

4:15 pm-1:43 pm

2 stops28h 28m

Jackson Hole

Mon 9/15

3:00 pm-7:25 am

2 stops33h 25m

$810

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 6/28

12:20 pm-3:55 pm

2 stops58h 35m

Boise Air Term. Gowen Fld

Mon 7/7

4:40 pm-11:10 am

1 stop35h 30m

$893

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 57 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 $421). 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 March 28, 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
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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
7,896 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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
1,321 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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
1,570 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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
1,424 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

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?

    $812 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Icelandair and Finnair, with prices starting from $905 and $991, respectively.

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

    When deciding which route to take from London to Idaho consider London Heathrow - Boise Air Term. Gowen Fld, London Heathrow - Jackson Hole or London Heathrow - Idaho Falls Fanning Field 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 $421). 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

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