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Idaho Falls

$864+ Cheap flights from Heathrow (LHR) to Idaho Falls (IDA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IDA
Aug 26 — Sep 21
Tue 8/26
Tue 9/2
1 adult, Economy
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Cheap flight deals from Heathrow to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Idaho Falls (IDA). 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 August 21, 2025.

Round-trip from

$864
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$1,495
From London Heathrow to Idaho Falls Fanning Field
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($247 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($47 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Heathrow to Idaho Falls

Cheapest flights from Heathrow to Idaho Falls
Explore the most affordable flight options available from Heathrow to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2025.

This American Airlines deal was found by Cheapflights users on 8/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/222:25 pmLHR - IDA
1 stop15h 09mAmerican Airlines
Wed 11/267:15 amIDA - LHR
2 stops21h 00mAmerican Airlines
Deal found 8/21$864
This Delta deal was found by Cheapflights users on 8/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:20 amLHR - IDA
2 stops18h 54mDelta
Wed 11/266:05 amIDA - LHR
2 stops18h 00mDelta
Deal found 8/21$871

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to Idaho Falls 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 21, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Idaho Falls that are best for you.

Fly from

Heathrow

Fly to

Idaho Falls

Route

Depart

Return

Price

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

2:25 pm-10:34 pm

1 stop15h 09m

Idaho Falls Fanning Field

Wed 11/26

7:15 am-11:15 am

2 stops21h 00m

$864

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

6:20 am-6:14 pm

2 stops18h 54m

Idaho Falls Fanning Field

Wed 11/26

6:05 am-7:05 am

2 stops18h 00m

$871

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/21

Best time to book a flight from Heathrow to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls 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 Falls

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

Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho Falls (average of $380). Flying from London Heathrow Airport to Idaho Falls in December is currently the most expensive (average of $578). 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.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Idaho Falls from London Heathrow?

    Idaho Falls Fanning Field (IDA), located 3.8 mi from the city center, is the airport you fly into when you book flights from London Heathrow to Idaho Falls. 0 airlines have flights to Fanning Field from London Heathrow on a regular basis. Booking flights from London Heathrow to Idaho Falls Fanning Field should not be difficult; the airport handles an average of 0 inbound flights from London Heathrow per day.

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

    A quick flight from London Heathrow Airport to Idaho Falls can take about 15h 09m. American Airlines provides one of the quickest options available for as low as $864. London Heathrow Airport and Idaho Falls are separated by a distance of 4705 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho Falls (average of $380). Flying from London Heathrow Airport to Idaho Falls in December is currently the most expensive (average of $578). 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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