HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$579+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 30, 2025.

Round-trip from

$775
(ChecknFly)

One-way from

$579
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$894
From London (LON) to Idaho
Search Deals
One-way flight from London (LON) to Idaho
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($198 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 30, 2025.

This ChecknFly deal was found by Cheapflights users on 4/29. 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.
Fri 9/265:40 pmLHR - BOI
2 stops26h 55mLufthansa
Mon 10/67:09 pmBOI - LHR
2 stops18h 31mLufthansa
Deal found 4/29$775
This Trip.com deal was found by Cheapflights users on 4/29. 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.
Mon 5/1910:45 amLGW - GEG
1 stop19h 37mMultiple Airlines
Mon 5/267:10 amGEG - LGW
1 stop19h 45mMultiple Airlines
Deal found 4/29$789
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 6/910:45 amLGW - BOI
1 stop34h 59mMultiple Airlines
Mon 6/308:18 amBOI - LGW
1 stop19h 37mMultiple Airlines
Deal found 4/28$830
This EaseMyTrip deal was found by Cheapflights users on 4/29. 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.
Mon 5/195:25 pmLHR - GEG
1 stop13h 25mVirgin Atlantic
Mon 5/269:45 amGEG - LHR
1 stop16h 05mVirgin Atlantic
Deal found 4/29$842
This Delta deal was found by Cheapflights users on 4/28. 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 6/249:55 amLHR - GEG
2 stops19h 12mDelta
Thu 7/39:40 amGEG - LHR
2 stops19h 30mDelta
Deal found 4/28$868
This United Airlines deal was found by Cheapflights users on 4/28. 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 6/111:45 pmLHR - GEG
2 stops41h 29mUnited Airlines
Wed 6/186:00 pmGEG - LHR
1 stop34h 20mUnited Airlines
Deal found 4/28$891
This United Airlines deal was found by Cheapflights users on 4/28. 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 6/97:25 amLHR - BOI
2 stops17h 36mUnited Airlines
Mon 6/308:30 amBOI - LHR
1 stop16h 50mUnited Airlines
Deal found 4/28$894
This American Airlines deal was found by Cheapflights users on 4/28. 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 6/243:10 pmLHR - GEG
1 stop16h 10mAmerican Airlines
Thu 7/33:10 pmGEG - LHR
1 stop15h 30mAmerican Airlines
Deal found 4/28$895
This Netflights deal was found by Cheapflights users on 4/28. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2512:00 pmLGW - GEG
2 stops20h 06mVirgin Atlantic
Mon 7/73:31 pmGEG - LGW
2 stops34h 29mVirgin Atlantic
Deal found 4/28$903
This The Travel House deal was found by Cheapflights users on 4/29. 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 6/189:25 pmLHR - BOI
2 stops56h 21mIcelandair
Mon 6/238:46 pmBOI - LHR
2 stops32h 09mIcelandair
Deal found 4/29$968
This ChecknFly deal was found by Cheapflights users on 4/29. 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 9/2712:20 pmLHR - JAC
2 stops31h 24mLufthansa
Sat 10/44:20 pmJAC - LHR
2 stops31h 00mLufthansa
Deal found 4/29$973
This EaseMyTrip deal was found by Cheapflights users on 4/29. 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 5/2811:00 amLHR - IDA
1 stop14h 10mVirgin Atlantic
Wed 6/113:04 pmIDA - LHR
2 stops32h 41mVirgin Atlantic
Deal found 4/29$997

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 30, 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

Fri 9/26

5:40 pm-1:35 pm

2 stops26h 55m

Boise Air Term. Gowen Fld

Mon 10/6

7:09 pm-8:40 pm

2 stops18h 31m

$775

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Mon 5/19

10:45 am-10:22 pm

1 stop19h 37m

Spokane

Mon 5/26

7:10 am-10:55 am

1 stop19h 45m

$789

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 6/9

10:45 am-2:44 pm

1 stop34h 59m

Boise Air Term. Gowen Fld

Mon 6/30

8:18 am-10:55 am

1 stop19h 37m

$830

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 5/19

5:25 pm-10:50 pm

1 stop13h 25m

Spokane

Mon 5/26

9:45 am-9:50 am

1 stop16h 05m

$842

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 6/24

9:55 am-9:07 pm

2 stops19h 12m

Spokane

Thu 7/3

9:40 am-1:10 pm

2 stops19h 30m

$868

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 6/11

1:45 pm-11:14 pm

2 stops41h 29m

Spokane

Wed 6/18

6:00 pm-12:20 pm

1 stop34h 20m

$891

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 6/9

7:25 am-6:01 pm

2 stops17h 36m

Boise Air Term. Gowen Fld

Mon 6/30

7:00 am-7:15 am

2 stops17h 15m

$894

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 6/24

3:10 pm-11:20 pm

1 stop16h 10m

Spokane

Thu 7/3

3:10 pm-2:40 pm

1 stop15h 30m

$895

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Wed 6/25

12:00 pm-12:06 am

2 stops20h 06m

Spokane

Mon 7/7

3:31 pm-10:00 am

2 stops34h 29m

$903

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 6/18

9:25 pm-10:46 pm

2 stops56h 21m

Boise Air Term. Gowen Fld

Mon 6/23

8:46 pm-11:55 am

2 stops32h 09m

$968

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 55 results
1
2
3
...
6

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 $406). 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 30, 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
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

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
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

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
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

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
1,275 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

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
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

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
1,446 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

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 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?

    $690 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 $819 and $996, 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 Heathrow - Jackson Hole 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 $406). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Heathrow to Los Angeles flights
London City to Newark flights
Gatwick to LaGuardia flights
Heathrow to Boston flights
Heathrow to Orlando flights
Heathrow to O'Hare Intl flights
Heathrow to Miami flights
Heathrow to Dallas/Fort Worth flights
Stansted to John F Kennedy Intl flights
Heathrow to San Francisco flights
Heathrow to Seattle flights
Heathrow to Hobby flights
Heathrow to Las Vegas flights
Heathrow to Dulles Intl flights
Luton to John F Kennedy Intl flights
Gatwick to Boston flights
Gatwick to Orlando flights
Manchester to Orlando flights
Manchester to John F Kennedy Intl flights
Heathrow to Baltimore flights
London City to Los Angeles flights
Heathrow to Atlanta flights
London City to Boston flights
Heathrow to George Bush Intcntl flights
Edinburgh to John F Kennedy Intl flights
Heathrow to Denver flights
Edinburgh to Newark flights
Manchester to Newark flights
Heathrow to Nashville flights
Luton to Los Angeles flights
Heathrow to Tampa flights
Heathrow to Raleigh flights
Heathrow to Detroit flights
Heathrow to Charlotte flights
Gatwick to Los Angeles flights
London City to O'Hare Intl flights
Luton to Newark flights
Gatwick to O'Hare Intl flights
London City to Miami flights
Manchester to LaGuardia flights
Stansted to Newark flights
Heathrow to Austin flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.