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Idaho

$504+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
Sep 3 — Sep 101
Thu 9/3
Thu 9/10
1 adult, Economy
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Cheap 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 August 4, 2026.

This Trip.com deal was found by Cheapflights users on 7/31. 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.
Fri 9/116:40 am
LHR
-
BOI
2 stops19h 00m
Scandinavian Airlines
Sat 9/2610:34 am
BOI
-
LHR
2 stops24h 06m
Scandinavian Airlines
Deal found 7/31$773
This Scandinavian Airlines deal was found by Cheapflights users on 8/3. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:40 am
LHR
-
GEG
2 stops18h 29m
Scandinavian Airlines
Sat 9/191:00 pm
GEG
-
LHR
3 stops19h 25m
Scandinavian Airlines
Deal found 8/3$789
This Scandinavian Airlines deal was found by Cheapflights users on 7/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:40 am
LHR
-
BOI
2 stops23h 14m
Scandinavian Airlines
Mon 12/74:14 pm
BOI
-
LHR
2 stops40h 46m
Scandinavian Airlines
Deal found 7/30$794
This Scandinavian Airlines deal was found by Cheapflights users on 8/2. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:40 am
LHR
-
BOI
2 stops22h 24m
Scandinavian Airlines
Sun 11/154:14 pm
BOI
-
LHR
2 stops19h 16m
Scandinavian Airlines
Deal found 8/2$825
This Rumbo deal was found by Cheapflights users on 8/1. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:40 am
LHR
-
GEG
2 stops18h 29m
Scandinavian Airlines
Tue 9/2211:10 am
GEG
-
LHR
2 stops20h 50m
Scandinavian Airlines
Deal found 8/1$888
This Trip.com deal was found by Cheapflights users on 7/30. 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.
Thu 9/173:40 pm
LGW
-
GEG
2 stops16h 19m
Multiple Airlines
Mon 9/217:03 am
GEG
-
LGW
2 stops23h 37m
Multiple Airlines
Deal found 7/30$911
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/82:50 pm
LHR
-
GEG
2 stops36h 01m
United Airlines
Wed 9/161:09 pm
GEG
-
LHR
1 stop14h 01m
United Airlines
Deal found 7/30$914
This United Airlines deal was found by Cheapflights users on 8/2. 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 9/164:40 pm
LHR
-
GEG
2 stops25h 50m
United Airlines
Wed 9/2311:00 am
GEG
-
LHR
2 stops15h 40m
United Airlines
Deal found 8/2$926
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sat 9/129:55 am
LHR
-
GEG
1 stop20h 43m
Multiple Airlines
Sat 9/197:00 am
GEG
-
LHR
2 stops20h 20m
Multiple Airlines
Deal found 8/3$927
This Expedia deal was found by Cheapflights users on 7/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:20 am
LGW
-
BOI
2 stops20h 39m
Multiple Airlines
Sun 11/11:51 pm
BOI
-
LGW
2 stops17h 59m
Multiple Airlines
Deal found 7/30$963
This The Travel House deal was found by Cheapflights users on 8/1. 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 9/81:00 pm
LGW
-
GEG
2 stops40h 48m
Icelandair
Tue 10/64:41 pm
GEG
-
LGW
2 stops13h 59m
Icelandair
Deal found 8/1$977
This Flightcatchers deal was found by Cheapflights users on 8/2. 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 Flightcatchers is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:25 am
LGW
-
GEG
2 stops21h 25m
Virgin Atlantic
Wed 10/143:30 pm
GEG
-
LGW
2 stops16h 30m
Virgin Atlantic
Deal found 8/2$1,003

Find flight deals from London to Idaho

Keep the following information in mind while searching for London to Idaho flight deals. Data was last updated August 4, 2026.

Round-trip from

$773
(Trip.com)

One-way from

$504
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,270
From London (LON) to Idaho
Search Deals
One-way flight from London (LON) to Idaho
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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 August 4, 2026.
Use the filters below to find and compare flights from London to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 9/12

6:40 am-5:09 pm

2 stops18h 29m

Spokane

Sat 9/19

1:00 pm-4:25 pm

3 stops19h 25m

$789

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 12/4

6:40 am-10:54 pm

2 stops23h 14m

Boise Air Term. Gowen Fld

Mon 12/7

4:14 pm-4:00 pm

2 stops40h 46m

$796

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 10/31

6:40 am-11:04 pm

2 stops22h 24m

Boise Air Term. Gowen Fld

Sun 11/15

4:14 pm-6:30 pm

2 stops19h 16m

$825

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 10/6

1:05 pm-11:59 pm

2 stops17h 54m

Boise Air Term. Gowen Fld

Sat 10/17

6:43 am-11:55 am

2 stops22h 12m

$904

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Thu 9/17

3:40 pm-11:59 pm

2 stops16h 19m

Spokane

Mon 9/21

7:03 am-2:40 pm

2 stops23h 37m

$911

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 9/8

2:50 pm-6:51 pm

2 stops36h 01m

Spokane

Wed 9/16

5:00 am-5:55 am

2 stops16h 55m

$914

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 9/21

11:05 am-7:16 pm

2 stops40h 11m

Spokane

Wed 9/30

4:08 pm-12:35 pm

1 stop12h 27m

$921

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 9/15

6:40 am-5:09 pm

2 stops18h 29m

Spokane

Tue 9/22

11:10 am-6:30 pm

2 stops23h 20m

$925

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/16

4:40 pm-10:30 am

2 stops25h 50m

Spokane

Wed 9/23

1:09 pm-11:10 am

1 stop14h 01m

$926

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Wed 10/14

10:20 am-11:59 pm

2 stops20h 39m

Boise Air Term. Gowen Fld

Sun 11/1

1:51 pm-2:50 pm

2 stops17h 59m

$963

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/2

Showing 1-10 of 60 resultsSorted by cheapest first
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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, January is the cheapest month in which you can book a flight from London to Idaho (average of $765). Flying from London to Idaho in August is currently the most expensive (average of $1,417). 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.

How much does it cost to fly round-trip from London to Idaho?

Airfare is below average for this route at the moment.
London to Idaho flights typically cost between $1,027 and $1,467 in September.
The cheapest round-trip price found within the last 5 days was $773 on Scandinavian Airlines (Sep 11-Sep 26).

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.

  • How long is the flight from London to Idaho?

    A quick flight from London to Idaho can take about 16h 19m. Scandinavian Airlines provides one of the quickest options available for as low as $1,001. Airlines will cover a distance of 4667 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 Gatwick - Spokane 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, January is the cheapest month in which you can book a flight from London to Idaho (average of $765). Flying from London to Idaho in August is currently the most expensive (average of $1,417). 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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