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$690+ Cheap flights from Heathrow (LHR) 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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Cheap flight deals from Heathrow to Idaho

Keep the following information in mind while searching for Heathrow to Idaho flight deals. Data was last updated April 30, 2025.

Round-trip from

$775
(ChecknFly)

One-way from

$690
(Cheapflightsfares)

Popular in

August

Cheapest in

November

Average price

$894
From London Heathrow to Idaho
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One-way flight from London Heathrow to Idaho
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Highest demand for flights based on searches. 17% potential increase in price ($198 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 Heathrow to Idaho

Cheapest flights from Heathrow to Idaho
Explore the most affordable flight options available from Heathrow 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 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 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
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1311:25 amLHR - BOI
1 stop17h 01mMultiple Airlines
Fri 6/205:43 pmBOI - LHR
1 stop11h 37mMultiple Airlines
Deal found 4/29$1,020
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/116:30 amLHR - IDA
2 stops23h 21mDelta
Fri 6/206:00 amIDA - LHR
2 stops24h 10mDelta
Deal found 4/29$1,026
This Netflights 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/229:50 amLHR - BOI
1 stop19h 52mBritish Airways
Mon 6/24:01 pmBOI - LHR
1 stop13h 59mBritish Airways
Deal found 4/29$1,031

Cheapflights Fare Finder

Customize your flight search to find flights from Heathrow 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 Heathrow Airport to Idaho that are best for you.

Fly from

Heathrow

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

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

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

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Sat 9/27

12:20 pm-12:44 pm

2 stops31h 24m

Jackson Hole

Sat 10/4

4:20 pm-6:20 am

2 stops31h 00m

$973

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 5/28

11:00 am-6:10 pm

1 stop14h 10m

Idaho Falls Fanning Field

Wed 6/11

3:04 pm-6:45 am

2 stops32h 41m

$997

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 6/13

11:25 am-9:26 pm

1 stop17h 01m

Boise Air Term. Gowen Fld

Fri 6/20

5:43 pm-12:20 pm

1 stop11h 37m

$1,020

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 44 results
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Best time to book a flight from Heathrow to Idaho

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

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

Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of $314). Flying from London Heathrow Airport 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 30, 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair from London to Idaho. 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
7,929 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

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
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

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
1,334 reviews
Delta
8.0
Very good
7,929 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

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
7,929 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

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
7,929 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

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
7,929 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

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 Heathrow 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 Heathrow Airport 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 $1,158, respectively.

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

    While some choose either London Heathrow - Boise Air Term. Gowen Fld or London Heathrow - Jackson Hole, London Heathrow - Spokane is the most popular route from London Heathrow Airport to Idaho.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow Airport to Idaho?

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

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