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$441+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from London to Idaho

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Idaho (USID). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$677
(The Travel House)

One-way from

$441
(Trip.com)
From London (LON) to Idaho
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One-way flight from London (LON) to Idaho
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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 January 21, 2025.

This The Travel House deal was found by Cheapflights users on 1/20. 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 2/197:30 amLHR - BOI
2 stops17h 20mLufthansa
Wed 2/268:30 amBOI - LHR
2 stops17h 40mLufthansa
Deal found 1/20$677
This The Travel House deal was found by Cheapflights users on 1/20. 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 2/211:25 amLHR - JAC
2 stops31h 42mFinnair
Sat 2/151:30 pmJAC - LHR
1 stop19h 30mFinnair
Deal found 1/20$702
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 3/68:55 amLHR - GEG
2 stops22h 49mUnited Airlines
Thu 3/135:00 amGEG - LHR
2 stops18h 55mUnited Airlines
Deal found 1/20$712
This United Airlines deal was found by Cheapflights users on 1/20. 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 3/2411:35 amLHR - BOI
1 stop31h 53mUnited Airlines
Sun 4/67:00 pmBOI - LHR
1 stop29h 25mUnited Airlines
Deal found 1/20$718
This The Travel House deal was found by Cheapflights users on 1/21. 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.
Thu 2/2012:30 pmLHR - BOI
1 stop17h 29mFinnair
Thu 2/277:05 amBOI - LHR
1 stop22h 00mFinnair
Deal found 1/21$730
This The Travel House deal was found by Cheapflights users on 1/21. 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.
Tue 9/22:20 pmLHR - BOI
1 stop15h 39mIberia
Fri 9/121:41 pmBOI - LHR
1 stop14h 09mIberia
Deal found 1/21$799
This TravelUp deal was found by Cheapflights users on 1/21. 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.
Mon 3/310:00 amLHR - IDA
2 stops43h 44mVirgin Atlantic
Sat 3/153:30 pmIDA - LHR
1 stop12h 30mVirgin Atlantic
Deal found 1/21$800
This Trip.com deal was found by Cheapflights users on 1/21. 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 3/31:15 pmLHR - IDA
1 stop16h 21mMultiple Airlines
Sat 3/158:00 amIDA - LHR
1 stop21h 10mMultiple Airlines
Deal found 1/21$806
This TravelUp deal was found by Cheapflights users on 1/21. 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.
Thu 2/209:20 amLCY - BOI
2 stops21h 38mVirgin Atlantic
Thu 2/2710:35 amBOI - LCY
2 stops38h 35mVirgin Atlantic
Deal found 1/21$846
This TravelUp deal was found by Cheapflights users on 1/21. 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.
Tue 9/26:15 amLHR - BOI
2 stops20h 05mVirgin Atlantic
Fri 9/127:15 amBOI - LHR
2 stops19h 10mVirgin Atlantic
Deal found 1/21$869
This TravelUp deal was found by Cheapflights users on 1/20. 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 3/196:30 amLHR - JAC
2 stops20h 34mLufthansa
Thu 3/272:40 pmJAC - LHR
1 stop13h 00mLufthansa
Deal found 1/20$906
This Delta deal was found by Cheapflights users on 1/20. 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.
Sat 2/159:10 amLHR - BOI
2 stops20h 52mDelta
Sat 3/1511:15 amBOI - LHR
1 stop16h 45mDelta
Deal found 1/20$913

Find flights from London to Idaho within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 2/19

7:30 am-5:50 pm

2 stops17h 20m

Boise Air Term. Gowen Fld

Wed 2/26

8:30 am-9:10 am

2 stops17h 40m

$677

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Sun 2/2

11:25 am-12:07 pm

2 stops31h 42m

Jackson Hole

Sat 2/15

1:30 pm-4:00 pm

1 stop19h 30m

$702

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 3/6

8:55 am-11:44 pm

2 stops22h 49m

Spokane

Thu 3/13

6:00 am-12:00 pm

1 stop23h 00m

$712

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 3/24

11:35 am-1:28 pm

1 stop31h 53m

Boise Air Term. Gowen Fld

Sun 4/6

7:00 pm-7:25 am

1 stop29h 25m

$718

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Thu 2/20

12:30 pm-10:59 pm

1 stop17h 29m

Boise Air Term. Gowen Fld

Thu 2/27

7:05 am-12:05 pm

1 stop22h 00m

$730

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 3/3

10:00 am-10:44 pm

2 stops43h 44m

Idaho Falls Fanning Field

Sat 3/15

3:30 pm-10:00 am

1 stop12h 30m

$800

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 3/3

1:15 pm-10:36 pm

1 stop16h 21m

Idaho Falls Fanning Field

Sat 3/15

8:00 am-11:10 am

1 stop21h 10m

$806

LondonBoise

LCY - BOI

LCYBOI

London City

Thu 2/20

9:20 am-11:58 pm

2 stops21h 38m

Boise Air Term. Gowen Fld

Thu 2/27

10:35 am-8:10 am

2 stops38h 35m

$846

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Wed 3/19

6:30 am-9:04 pm

2 stops20h 34m

Jackson Hole

Thu 3/27

2:40 pm-9:40 am

1 stop13h 00m

$906

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 2/15

12:10 pm-9:50 pm

1 stop16h 40m

Boise Air Term. Gowen Fld

Sat 3/15

1:36 pm-6:20 am

1 stop34h 44m

$909

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

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.

Travel insights for flights from London to Idaho

Get recent, data-driven insights about flights from London to Idaho including ideal travel times, pricing trends, and more.

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 $436). 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 January 21, 2025.
Read through reviews of airlines operating flights from London to Idaho, such as KLM, Icelandair 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
8,521 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 10

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

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 10

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

Air New Zealand
7.9
Good
483 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 10

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

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 10

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

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 10

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

Virgin Atlantic
7.5
Good
665 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 10

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?

    $725 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Icelandair and Finnair, with prices starting from $757 and $771, 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 Gatwick - Boise Air Term. Gowen Fld or London City - 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 $436). 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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