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Idaho

$439+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
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 January 14, 2026.

Round-trip from

$653
(The Travel House)

One-way from

$439
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$776
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. 8% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($54 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 14, 2026.

This The Travel House deal was found by Cheapflights users on 1/13. 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.
Mon 5/43:15 pm
LHR
-
GEG
1 stop29h 27m
Iberia
Sun 5/101:33 pm
GEG
-
LHR
2 stops36h 42m
Iberia
Deal found 1/13$653
This The Travel House deal was found by Cheapflights users on 1/13. 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 3/108:20 am
LHR
-
GEG
2 stops21h 54m
Iberia
Tue 3/176:00 am
GEG
-
LHR
2 stops17h 15m
Iberia
Deal found 1/13$670
This Trip.com deal was found by Cheapflights users on 1/14. 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.
Sat 2/2812:15 pm
LHR
-
IDA
2 stops18h 21m
Multiple Airlines
Sat 3/78:00 am
IDA
-
LHR
2 stops19h 50m
Multiple Airlines
Deal found 1/14$676
This United Airlines deal was found by Cheapflights users on 1/13. 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.
Fri 2/279:00 am
LHR
-
GEG
2 stops20h 07m
United Airlines
Fri 3/66:37 pm
GEG
-
LHR
1 stop31h 03m
United Airlines
Deal found 1/13$702
This United Airlines deal was found by Cheapflights users on 1/12. 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 2/56:35 am
LHR
-
GEG
2 stops20h 41m
United Airlines
Sun 2/86:53 am
GEG
-
LHR
1 stop21h 07m
United Airlines
Deal found 1/12$707
This United Airlines deal was found by Cheapflights users on 1/12. 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 2/106:50 am
LHR
-
GEG
2 stops36h 49m
United Airlines
Tue 2/177:00 am
GEG
-
LHR
1 stop14h 55m
United Airlines
Deal found 1/12$710
This Lufthansa deal was found by Cheapflights users on 1/13. 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 2/277:40 am
LHR
-
GEG
2 stops21h 27m
Lufthansa
Fri 3/612:41 pm
GEG
-
LHR
2 stops20h 09m
Lufthansa
Deal found 1/13$713
This United Airlines deal was found by Cheapflights users on 1/14. 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 5/48:40 am
LHR
-
GEG
2 stops34h 29m
United Airlines
Sun 5/101:45 pm
GEG
-
LHR
1 stop14h 35m
United Airlines
Deal found 1/14$718
This TravelUp deal was found by Cheapflights users on 1/12. 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 2/1011:05 am
LHR
-
GEG
1 stop16h 49m
Virgin Atlantic
Tue 2/171:25 pm
GEG
-
LHR
1 stop14h 30m
Virgin Atlantic
Deal found 1/12$722
This The Travel House deal was found by Cheapflights users on 1/13. 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 3/102:45 pm
LHR
-
GEG
1 stop37h 27m
Finnair
Tue 3/1712:25 pm
GEG
-
LHR
1 stop13h 10m
Finnair
Deal found 1/13$723
This Expedia deal was found by Cheapflights users on 1/14. 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 2/116:35 am
LHR
-
BOI
2 stops18h 32m
Lufthansa
Wed 2/188:05 am
BOI
-
LHR
1 stop14h 50m
Lufthansa
Deal found 1/14$723
This Cheapflightsfares deal was found by Cheapflights users on 1/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/141:45 pm
LHR
-
GEG
1 stop15h 22m
Lufthansa
Tue 2/177:00 am
GEG
-
LHR
1 stop16h 25m
Lufthansa
Deal found 1/12$729

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 January 14, 2026.
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

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 5/4

3:15 pm-12:42 pm

1 stop29h 27m

Spokane

Sun 5/10

1:33 pm-10:15 am

2 stops36h 42m

$653

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

8:20 am-11:14 pm

2 stops21h 54m

Spokane

Tue 3/17

6:00 am-6:15 am

2 stops17h 15m

$670

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 2/27

9:00 am-9:07 pm

2 stops20h 07m

Spokane

Fri 3/6

6:37 pm-9:40 am

1 stop31h 03m

$702

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 2/6

6:35 am-7:16 pm

2 stops20h 41m

Spokane

Sat 2/21

12:38 pm-1:30 pm

2 stops16h 52m

$707

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 2/5

11:10 am-10:44 am

2 stops31h 34m

Spokane

Sun 2/8

5:00 am-9:40 am

1 stop20h 40m

$707

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 2/10

6:50 am-11:39 am

2 stops36h 49m

Spokane

Tue 2/17

7:00 am-5:55 am

1 stop14h 55m

$710

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 2/27

7:40 am-9:07 pm

2 stops21h 27m

Spokane

Fri 3/6

12:41 pm-4:50 pm

2 stops20h 09m

$713

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 5/4

8:40 am-11:09 am

2 stops34h 29m

Spokane

Sun 5/10

1:45 pm-12:20 pm

1 stop14h 35m

$718

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 2/11

7:40 am-6:07 pm

2 stops17h 27m

Boise Air Term. Gowen Fld

Wed 2/18

2:40 pm-2:45 pm

2 stops17h 05m

$757

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 4/20

7:25 am-9:54 am

2 stops33h 29m

Boise Air Term. Gowen Fld

Mon 4/27

5:00 am-6:55 am

2 stops18h 55m

$767

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

Showing 1-10 of 59 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of $682). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of $955). 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 Heathrow Airport to Idaho?

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.

  • How long is the flight from London Heathrow Airport to Idaho?

    Iberia, United Airlines, and Lufthansa can get you from London Heathrow Airport to Idaho in just under 17h 27m. Your travel time can differ by up to 12h. London Heathrow Airport and Idaho are separated by a distance of 4829 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    While some choose either London Heathrow - Spokane or London Heathrow - Jackson Hole, London Heathrow - Boise Air Term. Gowen Fld 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of $682). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of $955). 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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