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Cheap flights from London Heathrow Airport to Idaho Falls from £534

LHR — IDA
10 Dec — 17 Dec1
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

Tue 8/1214:45 -
1 stop31h 22m
Fri 11/1206:00 -
1 stop23h 20m
Deal found 7/11£753
Sun 15/1114:45 -
1 stop15h 09m
Wed 18/1113:53 -
1 stop15h 27m
Deal found 10/11£917
Thu 24/1206:20 -
2 stops23h 15m
Thu 31/1205:40 -
2 stops22h 05m
Deal found 9/11£974
Thu 24/1209:35 -
2 stops19h 35m
Thu 31/1213:48 -
1 stop13h 37m
Deal found 9/11£979
Thu 24/1214:45 -
1 stop16h 00m
Thu 31/1213:52 -
1 stop15h 28m
Deal found 9/11£1,019
Thu 24/1207:40 -
2 stops20h 39m
Thu 31/1207:00 -
2 stops17h 40m
Deal found 9/11£1,250
Sun 15/1112:15 -
2 stops32h 01m
Wed 18/1106:00 -
2 stops18h 05m
Deal found 10/11£1,251
Tue 8/1212:15 -
2 stops33h 52m
Fri 11/1206:00 -
1 stop23h 20m
Deal found 7/11£1,267
Mon 16/1120:35 -
2 stops33h 19m
Wed 18/1113:53 -
1 stop15h 27m
Deal found 10/11£1,366

Find flight deals from Heathrow to Idaho Falls

Round-trip from

£753

One-way from

£534
Alaska Airlines
  • Alaska Airlines
  • 8/12-11/12
  • 2 total stops
  • 54h 42m total
  • London to Idaho Falls
Search Deals
16/11-31/12
  • 16/11-31/12
  • 3 total stops
  • 51h 48m 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

Mon 16/11

18:30-15:18

3 stops51h 48m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£534

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Sun 13/12

19:55-13:17

3 stops48h 22m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£577

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Sat 26/12

14:45-23:45

1 stop16h 00m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£656
Fastest return journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Sun 13/12

10:45-18:17

1 stop14h 32m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£728

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 28/12

06:35-09:54

2 stops34h 19m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£731

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Sun 27/12

07:40-21:19

2 stops20h 39m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£788

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Sat 26/12

11:35-13:28

1 stop32h 53m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£788

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 28/12

14:45-15:18

1 stop31h 33m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£801

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 28/12

13:45-13:15

3 stops30h 30m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£842

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 6/5

17:00-15:29

1 stop29h 29m

Idaho Falls Fanning Field

Mon 10/5

06:15-15:05

1 stop25h 50m

£850

Flights are sorted by cheapest return flights first.

Deals found on 10/11

Showing 1-10 of 14 resultsSorted by cheapest first
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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 77% 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?

Seattle (SEA) is the most affordable one-stop option, with an average return flight price of £677.

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
7.3
Good
10,471 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.3

Boarding

7.7

Food

6.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Asha,Sept 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
United Airlines
7.3
Good
10,471 reviews
United Airlines
7.3
Good
10,471 reviews
Check prices

Comfort

7.3

Crew

8.1

Overall

7.3

Boarding

7.7

Food

6.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Asha,Sept 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

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 20h 38m. 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

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Heathrow to Idaho Falls

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£1,039Average£1,150FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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.

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