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Cheap flights from London Heathrow Airport to Idaho Falls from £599

LHR — IDA
28 Sep — 5 Oct1
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

Mon 12/1011:40 -
1 stop18h 19m
Mon 19/1013:58 -
1 stop14h 22m
Deal found 28/8£764
Sun 11/1011:40 -
1 stop18h 19m
Sun 18/1013:58 -
1 stop18h 37m
Deal found 26/8£772
Tue 22/910:55 -
1 stop18h 27m
Tue 29/913:05 -
1 stop14h 55m
Deal found 25/8£814
Tue 22/920:55 -
2 stops32h 27m
Tue 29/913:05 -
2 stops19h 30m
Deal found 25/8£820
Mon 12/1017:00 -
2 stops27h 21m
Mon 19/1013:58 -
1 stop18h 07m
Deal found 28/8£821
Tue 22/906:15 -
2 stops19h 02m
Tue 29/906:00 -
1 stop22h 00m
Deal found 25/8£825
Tue 22/908:55 -
1 stop19h 25m
Tue 29/913:58 -
1 stop15h 17m
Deal found 25/8£840
Mon 12/1018:35 -
2 stops34h 35m
Mon 19/1013:05 -
2 stops35h 10m
Deal found 28/8£845
Tue 22/910:25 -
2 stops17h 53m
Tue 29/910:35 -
2 stops17h 05m
Deal found 25/8£910
Sun 11/1008:15 -
2 stops20h 27m
Sun 18/1006:37 -
2 stops18h 28m
Deal found 26/8£951

Find flight deals from Heathrow to Idaho Falls

Round-trip from

£722

One-way from

£599
Alaska Airlines
  • Alaska Airlines
  • 28/1-1/2
  • 2 total stops
  • 47h 00m total
  • London to Idaho Falls
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 8/1
  • 2 total stops
  • 29h 34m total
  • London to Idaho Falls
Search Deals

Cheapflights Fare Finder

 
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 London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 28/1

14:45-15:21

1 stop31h 36m

Idaho Falls Fanning Field

Mon 1/2

13:56-12:20

1 stop15h 24m

£722

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 22/9

06:15-18:17

2 stops19h 02m

Idaho Falls Fanning Field

Tue 29/9

06:00-11:00

1 stop22h 00m

£825
Fastest return journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 22/9

08:55-21:20

1 stop19h 25m

Idaho Falls Fanning Field

Tue 29/9

13:58-12:15

1 stop15h 17m

£840

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 12/10

18:35-22:10

2 stops34h 35m

Idaho Falls Fanning Field

Mon 19/10

13:05-07:15

2 stops35h 10m

£845

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 28/1

06:35-17:22

2 stops17h 47m

Idaho Falls Fanning Field

Mon 1/2

07:00-09:40

1 stop19h 40m

£892
Cheapest one-way

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 8/1

14:45-13:19

2 stops29h 34m

£599

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 8/1

13:00-21:08

3 stops39h 08m

£696
Fastest single journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 8/1

13:15-22:36

1 stop16h 21m

£1,453

Flights are sorted by cheapest return flights first.

Deals found on 28/8

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

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?

Denver (DEN) – chosen by Cheapflights users on 83% 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?

Salt Lake City (SLC) is the most affordable one-stop option, with an average return flight price of £926.

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

Flights via Denver (DEN) have the shortest average one-way travel time for one-stop routes: 12h 54m.

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

Flights via Denver (DEN) offer the fastest connection on this route, with an average stopover time of 1h 11m.

Reviews of airlines servicing Idaho Falls

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
10,136 reviews
Check prices

Food

6.7

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
United Airlines
7.4
Good
10,136 reviews
United Airlines
7.4
Good
10,136 reviews
Check prices

Food

6.7

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

Related info for your journey

  • 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 31h 36m. Airlines will cover 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 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

Top airline flying from Heathrow to Idaho Falls

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£1,027Average£1,136FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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