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Cheap flights from London Heathrow Airport to Idaho Falls from £555

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 19/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IDA
11 Jun — 18 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Idaho Falls

Enter your travel dates to find the best prices.

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 12 May 2026.

Tue 1/921:25
LHR
-
IDA
2 stops32h 31m
Icelandair
Fri 25/906:18
IDA
-
LHR
2 stops22h 37m
Icelandair
Deal found 8/5£789
Tue 1/921:25
LHR
-
IDA
2 stops32h 31m
Multiple Airlines
Fri 25/906:18
IDA
-
LHR
2 stops22h 37m
Multiple Airlines
Deal found 10/5£829
Thu 5/1114:45
LHR
-
IDA
1 stop14h 54m
Alaska Airlines
Mon 9/1106:15
IDA
-
LHR
1 stop23h 05m
Alaska Airlines
Deal found 7/5£849
Wed 11/1114:45
LHR
-
IDA
1 stop15h 57m
Alaska Airlines
Sun 15/1106:04
IDA
-
LHR
1 stop23h 16m
Alaska Airlines
Deal found 11/5£849
Tue 1/910:05
LHR
-
IDA
1 stop18h 15m
Finnair
Fri 25/913:44
IDA
-
LHR
1 stop15h 31m
Finnair
Deal found 11/5£854
Tue 1/912:55
LHR
-
IDA
1 stop15h 25m
Iberia
Fri 25/907:00
IDA
-
LHR
2 stops16h 25m
Iberia
Deal found 8/5£857
Tue 1/909:55
LHR
-
IDA
2 stops19h 19m
KLM
Fri 25/918:50
IDA
-
LHR
1 stop32h 10m
KLM
Deal found 10/5£858

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 12 May 2026.

Round-trip from

£789

One-way from

£555
Icelandair
  • Icelandair
  • 1/9-25/9
  • 4 total stops
  • 55h 08m total
  • London to Idaho Falls
Search Deals
19/10
  • 19/10
  • 3 total stops
  • 30h 21m total
  • London to Idaho Falls
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 12 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

21:25-22:56

2 stops32h 31m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£789

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

09:55-22:14

2 stops19h 19m

Idaho Falls Fanning Field

Fri 25/9

18:50-10:00

1 stop32h 10m

£858

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:15-21:20

2 stops18h 05m

Idaho Falls Fanning Field

Fri 25/9

13:44-12:15

1 stop15h 31m

£858

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

17:00-15:37

1 stop29h 37m

Idaho Falls Fanning Field

Tue 16/6

07:15-15:05

1 stop24h 50m

£889

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

10:55-18:17

1 stop14h 22m

Idaho Falls Fanning Field

Tue 16/6

06:00-13:05

2 stops24h 05m

£909

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 5/6

12:55-22:15

1 stop16h 20m

Idaho Falls Fanning Field

Mon 15/6

07:00-06:40

2 stops16h 40m

£931

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 5/6

06:30-22:42

2 stops23h 12m

Idaho Falls Fanning Field

Mon 15/6

06:00-13:15

2 stops24h 15m

£935
Fastest return journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 5/6

10:05-22:15

2 stops19h 10m

Idaho Falls Fanning Field

Mon 15/6

14:26-10:55

1 stop13h 29m

£946
Cheapest one-way
Fastest single journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 19/10

13:45-13:06

3 stops30h 21m

£555

Flights are sorted by cheapest return flights first.

Deals found on 10/5

Sorted by cheapest first

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 return 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’s the top stopover airport for flights from London Heathrow Airport to Idaho Falls?

Share of one-stop return flights from London Heathrow Airport to Idaho Falls chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Denver (DEN) – chosen by Cheapflights users on 62% of one-stop itineraries from London Heathrow Airport to Idaho Falls on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Idaho Falls?

Average return fare for one-stop flights from London Heathrow Airport to Idaho Falls, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Dallas (DFW) is the most affordable one-stop option, with an average return flight price of £725.

What’s the fastest stopover option from London Heathrow Airport to Idaho Falls?

Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Idaho Falls, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Denver (DEN) have the shortest average one-way travel time for one-stop routes: 13h 36m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Idaho Falls?

Average stopover duration for one-stop one-way flights from London Heathrow Airport to Idaho Falls, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average stopover time of 1h 52m.

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?

    Located just 3.8 mi from the city center, Idaho Falls Fanning Field is the airport most travelers will use when flying to Idaho Falls from London Heathrow. Booking flights from London Heathrow to Fanning Field (IDA) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.

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

    Departing from London Heathrow Airport to Idaho Falls will take you 19h 19m. Airlines will cover a distance of 4705 mi. Both multi-stop and direct 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 holiday 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.

See more FAQs

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How does Cheapflights help users find flights from Heathrow to Idaho Falls?

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to Idaho Falls?

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Idaho Falls by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Heathrow to Idaho Falls with no change fees?

Need flexible booking options for your flight to Idaho Falls from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Idaho Falls become cheaper?

Of course! You can now track prices for flights from Heathrow to Idaho Falls and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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