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Cheap flights from London Heathrow Airport to Idaho Falls from £403

LHR — IDA
29 Nov — 6 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 17/1111:50 -
1 stop16h 53m
Mon 30/1113:43 -
2 stops37h 42m
Deal found 27/10£872
Tue 17/1108:20 -
1 stop20h 23m
Mon 30/1108:00 -
1 stop21h 10m
Deal found 27/10£890
Tue 17/1106:35 -
2 stops34h 18m
Mon 30/1110:35 -
2 stops18h 25m
Deal found 27/10£981
Mon 14/1214:35 -
1 stop15h 27m
Mon 21/1206:15 -
1 stop24h 20m
Deal found 30/10£999
Mon 14/1211:00 -
2 stops19h 02m
Mon 21/1206:15 -
1 stop24h 20m
Deal found 30/10£1,002
Sat 26/1212:20 -
1 stop18h 25m
Sun 3/113:52 -
2 stops37h 58m
Deal found 29/10£1,005
Mon 14/1206:35 -
2 stops21h 24m
Mon 21/1207:00 -
2 stops17h 55m
Deal found 30/10£1,035
Sat 26/1214:45 -
1 stop16h 00m
Sun 3/113:52 -
1 stop15h 28m
Deal found 29/10£1,047
Fri 11/1216:30 -
2 stops27h 41m
Fri 18/1206:00 -
2 stops23h 05m
Deal found 27/10£1,086
Sat 12/1210:45 -
1 stop18h 40m
Sat 19/1213:09 -
1 stop13h 51m
Deal found 28/10£1,098

Find flight deals from Heathrow to Idaho Falls

Round-trip from

£725

One-way from

£403
Alaska Airlines
  • Alaska Airlines
  • 28/1-1/2
  • 2 total stops
  • 47h 00m total
  • London to Idaho Falls
Search Deals
3/12-31/12
  • 3/12-31/12
  • 3 total stops
  • 35h 18m 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 10/12

06:00-12:51

3 stops37h 51m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£446

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 11/1

15:20-13:19

2 stops28h 59m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£509

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 7/12

20:35-15:07

2 stops49h 32m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£546

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 9/12

11:35-15:29

1 stop34h 54m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£662

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

£725

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 3/12

14:35-23:02

1 stop15h 27m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£738
Fastest return journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 27/11

14:25-22:31

1 stop15h 06m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£749

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 17/11

11:50-21:43

1 stop16h 53m

Idaho Falls Fanning Field

Mon 30/11

13:43-10:25

2 stops37h 42m

£872

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 17/11

06:35-09:53

2 stops34h 18m

Idaho Falls Fanning Field

Mon 30/11

10:35-12:00

2 stops18h 25m

£981

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 14/12

14:35-23:02

1 stop15h 27m

Idaho Falls Fanning Field

Mon 21/12

06:15-13:35

1 stop24h 20m

£999

Flights are sorted by cheapest return flights first.

Deals found on 30/10

Showing 1-10 of 11 resultsSorted by cheapest first
1
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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
10,451 reviews
Check prices

Entertainment

7.1

Overall

7.3

Boarding

7.7

Crew

8.1

Food

6.7

Comfort

7.3

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
10,451 reviews
United Airlines
7.3
Good
10,451 reviews
Check prices

Entertainment

7.1

Overall

7.3

Boarding

7.7

Crew

8.1

Food

6.7

Comfort

7.3

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 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£1,040Average£1,150FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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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