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Cheap flights from London Heathrow Airport to Idaho Falls from £770

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IDA
17 May — 24 May1
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 17 April 2026.

Tue 1/913:05
LHR
-
IDA
2 stops16h 51m
Multiple Airlines
Fri 25/906:18
IDA
-
LHR
2 stops22h 37m
Multiple Airlines
Deal found 12/4£770
Tue 1/913:05
LHR
-
IDA
2 stops16h 51m
Icelandair
Fri 25/906:18
IDA
-
LHR
2 stops22h 37m
Icelandair
Deal found 14/4£796
Tue 1/906:15
LHR
-
IDA
2 stops18h 59m
Delta
Fri 25/906:10
IDA
-
LHR
1 stop20h 50m
Delta
Deal found 14/4£835
Sat 7/1114:45
LHR
-
IDA
1 stop14h 54m
Alaska Airlines
Wed 11/1116:03
IDA
-
LHR
1 stop13h 17m
Alaska Airlines
Deal found 13/4£844
Tue 1/910:05
LHR
-
IDA
1 stop18h 15m
American Airlines
Fri 25/914:20
IDA
-
LHR
1 stop15h 30m
American Airlines
Deal found 13/4£849

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 17 April 2026.

Round-trip from

£796
Icelandair
  • Icelandair
  • 1/9-25/9
  • 4 total stops
  • 39h 28m 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 17 April 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

13:05-22:56

2 stops16h 51m

Idaho Falls Fanning Field

Fri 25/9

13:45-20:20

2 stops23h 35m

£807

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

06:15-18:14

2 stops18h 59m

Idaho Falls Fanning Field

Fri 25/9

06:10-10:00

1 stop20h 50m

£835

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 6/9

15:15-12:10

1 stop27h 55m

Idaho Falls Fanning Field

Sun 20/9

13:44-09:05

1 stop12h 21m

£906

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

06:30-22:31

2 stops23h 01m

Idaho Falls Fanning Field

Tue 16/6

06:00-06:25

2 stops17h 25m

£951
Fastest return journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

12:55-22:15

1 stop16h 20m

Idaho Falls Fanning Field

Tue 16/6

07:00-10:55

1 stop20h 55m

£979

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

10:20-22:53

2 stops19h 33m

Idaho Falls Fanning Field

Tue 16/6

13:43-17:05

2 stops20h 22m

£994
Cheapest one-way

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 9/5

21:25-22:40

3 stops56h 15m

£1,399
Fastest single journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 9/5

10:55-18:14

1 stop14h 19m

£3,686

Flights are sorted by cheapest return flights first.

Deals found on 15/4

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 67% 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 £728.

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 31m.

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 48m.

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho Falls. Reviews last updated 17 April 2026.
Read reviews from past customers who have flown with United Airlines from London Heathrow Airport to Idaho Falls. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,602 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,602 reviews
United Airlines
7.4
Good
9,602 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 1 airline.

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

    Departing from London Heathrow Airport to Idaho Falls will take you 18h 59m. Airlines will cover a distance of 4705 mi.

  • What is the cheapest airline to fly from London Heathrow Airport to Idaho Falls round-trip?

    Our cheapest airline available from London Heathrow Airport to Idaho Falls is United Airlines. Our recent data shows that you can find tickets from as low as £871 on this airline.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Heathrow to Idaho Falls

Discover the top airline that operate flights from Heathrow to Idaho Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£871Average£1,027FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Idaho Falls from Heathrow today with Cheapflights!

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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