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Idaho Falls

$656+ Cheap flights from Heathrow (LHR) to Idaho Falls (IDA)

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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IDA
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Heathrow to Idaho Falls

Best flights from Heathrow to Idaho Falls
Discover carefully curated flight deals from Heathrow to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

This Finnair deal was found by Cheapflights users on 12/17. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/14:30 pmLHR - IDA
1 stop28h 07mMultiple Airlines
Sun 2/87:20 amIDA - LHR
1 stop22h 55mMultiple Airlines
Deal found 12/17$938
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Sun 2/14:30 pmLHR - IDA
1 stop28h 07mAmerican Airlines
Sun 2/87:20 amIDA - LHR
2 stops17h 30mAmerican Airlines
Deal found 12/17$966

Find 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 December 18, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Popular in

May

Cheapest in

November

Average price

$889
Provider with most accurate pricing for London Heathrow-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Idaho Falls Fanning Field flights.
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($168 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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

Sun 2/1

4:30 pm-1:37 pm

1 stop28h 07m

Idaho Falls Fanning Field

Sun 2/8

7:20 am-1:15 pm

1 stop22h 55m

$938

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 2/1

4:30 pm-1:37 pm

1 stop28h 07m

Idaho Falls Fanning Field

Sun 2/8

7:20 am-7:50 am

2 stops17h 30m

$966

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 4/21

10:05 am-9:56 pm

1 stop18h 51m

$656

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 4/21

6:15 am-6:14 pm

2 stops18h 59m

$672

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 6/5

8:20 am-9:05 pm

1 stop19h 45m

$825

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 6/5

9:55 am-10:14 pm

2 stops19h 19m

$835

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Idaho Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Idaho Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Idaho Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Idaho Falls flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Idaho Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho Falls (average of $820). Flying from London Heathrow Airport to Idaho Falls in December is currently the most expensive (average of $1,342). 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 28h 07m. American Airlines provides one of the quickest options available for as low as $966. London Heathrow Airport and Idaho Falls are separated by a distance of 4705 mi.

  • 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho Falls (average of $820). Flying from London Heathrow Airport to Idaho Falls in December is currently the most expensive (average of $1,342). 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

Traveling to a place near Idaho Falls?

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Rexburg

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