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Cheap flights from London Heathrow Airport to Idaho Falls from £441

LHR — IDA
30 Oct — 6 Nov1
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 10/1114:45 -
1 stop15h 09m
Tue 17/1106:04 -
1 stop23h 16m
Deal found 26/9£731
Mon 26/1014:45 -
1 stop14h 14m
Mon 2/1106:04 -
1 stop23h 16m
Deal found 26/9£850
Sat 24/1017:00 -
1 stop29h 20m
Sat 31/1006:09 -
1 stop24h 11m
Deal found 26/9£877
Tue 10/1107:30 -
2 stops20h 39m
Tue 17/1110:35 -
2 stops17h 15m
Deal found 26/9£934
Sat 24/1011:40 -
2 stops17h 30m
Sat 31/1013:05 -
2 stops15h 35m
Deal found 26/9£979
Mon 26/1007:30 -
2 stops19h 39m
Mon 2/1114:35 -
2 stops23h 00m
Deal found 26/9£994
Sat 24/1012:55 -
1 stop15h 47m
Sat 31/1013:50 -
1 stop12h 45m
Deal found 26/9£1,012
Wed 30/917:00 -
1 stop29h 20m
Mon 2/1106:04 -
1 stop23h 16m
Deal found 26/9£1,198
Wed 30/908:00 -
2 stops16h 16m
Mon 2/1116:30 -
2 stops21h 05m
Deal found 26/9£1,318

Find flight deals from Heathrow to Idaho Falls

Round-trip from

£731

One-way from

£441
Alaska Airlines
  • Alaska Airlines
  • 10/11-17/11
  • 2 total stops
  • 38h 25m total
  • London to Idaho Falls
Search Deals
19/11-31/12
  • 19/11-31/12
  • 3 total stops
  • 31h 44m 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 19/11

14:50-15:34

3 stops31h 44m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£441

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 8/1

08:45-15:21

3 stops37h 36m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£536
Fastest return journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 19/11

14:45-15:09

1 stop31h 24m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£558

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 10/11

14:45-22:54

1 stop15h 09m

Idaho Falls Fanning Field

Tue 17/11

06:04-12:20

1 stop23h 16m

£731

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

£808

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 15/1

14:45-22:53

1 stop15h 08m

Idaho Falls Fanning Field

Thu 21/1

09:08-12:20

1 stop20h 12m

£817

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Sat 24/10

19:30-15:20

2 stops50h 50m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£828

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 15/1

12:15-22:53

2 stops17h 38m

Idaho Falls Fanning Field

Thu 21/1

09:08-10:50

2 stops18h 42m

£840

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 13/1

10:45-18:14

1 stop14h 29m

Idaho Falls Fanning Field

Mon 18/1

18:45-20:10

2 stops18h 25m

£849

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 8/1

16:35-22:19

2 stops36h 44m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£1,201

Flights are sorted by cheapest return flights first.

Deals found on 26/9

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 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 £685.

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
10,261 reviews
Check prices

Comfort

7.3

Food

6.7

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

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
7.4
Good
10,261 reviews
United Airlines
7.4
Good
10,261 reviews
Check prices

Comfort

7.3

Food

6.7

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

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 15h 09m. 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£1,053Average£1,165FlexibilityNo 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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