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Cheap flights from London to Idaho Falls from £800

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.
LON — IDA
28 May — 4 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Idaho Falls

Enter your travel dates to find the best prices.

Cheapest flights from London to Idaho Falls
Explore the most affordable flight options available from London to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 April 2026.

Tue 1/913:05
LHR
-
IDA
2 stops16h 51m
Icelandair
Fri 25/906:18
IDA
-
LHR
2 stops31h 02m
Icelandair
Deal found 23/4£800
Tue 1/913:00
LGW
-
IDA
2 stops16h 56m
Multiple Airlines
Fri 25/913:45
IDA
-
LGW
2 stops17h 55m
Multiple Airlines
Deal found 27/4£811
Tue 1/913:05
LHR
-
IDA
2 stops16h 51m
Multiple Airlines
Fri 25/906:18
IDA
-
LHR
2 stops22h 37m
Multiple Airlines
Deal found 27/4£812
Mon 8/611:40
LHR
-
IDA
1 stop18h 13m
Multiple Airlines
Mon 15/613:43
IDA
-
LHR
1 stop15h 27m
Multiple Airlines
Deal found 24/4£825
Tue 9/617:00
LHR
-
IDA
1 stop29h 37m
Alaska Airlines
Tue 16/613:43
IDA
-
LHR
1 stop18h 22m
Alaska Airlines
Deal found 26/4£828
Tue 1/906:15
LHR
-
IDA
2 stops18h 59m
Delta
Fri 25/913:10
IDA
-
LHR
1 stop13h 50m
Delta
Deal found 27/4£841
Tue 1/910:05
LHR
-
IDA
1 stop18h 15m
American Airlines
Fri 25/914:20
IDA
-
LHR
1 stop17h 05m
American Airlines
Deal found 27/4£860
Mon 8/610:25
LGW
-
IDA
2 stops19h 28m
Multiple Airlines
Mon 15/607:15
IDA
-
LGW
2 stops19h 25m
Multiple Airlines
Deal found 24/4£919
Mon 27/415:40
LGW
-
IDA
2 stops30h 49m
Multiple Airlines
Mon 4/516:06
IDA
-
LGW
2 stops39h 34m
Multiple Airlines
Deal found 26/4£1,207
Thu 23/715:40
LGW
-
IDA
2 stops37h 59m
Multiple Airlines
Fri 31/716:14
IDA
-
LGW
2 stops15h 26m
Multiple Airlines
Deal found 26/4£1,411
Thu 16/713:00
LGW
-
IDA
2 stops16h 39m
Multiple Airlines
Fri 17/716:14
IDA
-
LGW
2 stops15h 26m
Multiple Airlines
Deal found 25/4£1,586
Thu 30/713:00
LGW
-
IDA
2 stops16h 39m
Multiple Airlines
Mon 3/813:43
IDA
-
LGW
2 stops17h 57m
Multiple Airlines
Deal found 26/4£1,593

Find flight deals from London to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 28 April 2026.

Round-trip from

£800
Icelandair
  • Icelandair
  • 1/9-25/9
  • 4 total stops
  • 47h 53m total
  • London to Idaho Falls
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 28 April 2026.
Use the filters below to find and compare flights from London to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

13:00-22:56

2 stops16h 56m

Idaho Falls Fanning Field

Fri 25/9

13:45-14:40

2 stops17h 55m

£811

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops16h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£828

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

17:00-15:37

1 stop29h 37m

Idaho Falls Fanning Field

Tue 16/6

13:43-15:05

1 stop18h 22m

£829

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

£841

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

08:55-21:20

1 stop19h 25m

Idaho Falls Fanning Field

Fri 25/9

14:20-14:25

1 stop17h 05m

£862

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

21:25-22:39

2 stops32h 14m

Idaho Falls Fanning Field

Tue 16/6

13:43-20:20

2 stops23h 37m

£881

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Mon 8/6

10:25-22:53

2 stops19h 28m

Idaho Falls Fanning Field

Mon 15/6

07:15-09:40

2 stops19h 25m

£919

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 5/6

06:30-22:42

2 stops23h 12m

Idaho Falls Fanning Field

Mon 15/6

15:25-13:05

2 stops14h 40m

£926

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Thu 23/7

15:40-22:39

2 stops37h 59m

Idaho Falls Fanning Field

Fri 31/7

16:14-14:40

2 stops15h 26m

£1,411
Fastest return journey

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Thu 16/7

13:00-22:39

2 stops16h 39m

Idaho Falls Fanning Field

Fri 17/7

16:14-14:40

2 stops15h 26m

£1,586

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Best time to book a flight from London to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from London 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 to Idaho Falls

What’s the top stopover airport for flights from London to Idaho Falls?

Share of one-stop return flights from London 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 70% of one-stop itineraries from London to Idaho Falls on Cheapflights.

What’s the cheapest stopover airport for flights from London to Idaho Falls?

Average return fare for one-stop flights from London 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 to Idaho Falls?

Shortest average travel time for one-stop one-way flights from London 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: 12h 59m.

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

Average stopover duration for one-stop one-way flights from London 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 17m.

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 28 April 2026.
Read through reviews of airlines operating flights from London to Idaho Falls, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,672 reviews
Check prices

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

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
9,672 reviews
United Airlines
7.4
Good
9,672 reviews
Check prices

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

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 London 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?

    For a flight from London to Idaho Falls, you will be flying into Fanning Field. Idaho Falls Fanning Field (IDA) is just 3.8 mi from the center of the city. Fanning Field is the only Idaho Falls airport and it handles 0 inbound flights from London per day. 1 airline has flights to Idaho Falls Fanning Field from London on a regular basis.

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

    For as low as £841, Alaska Airlines can have you in Idaho Falls from London in 18h 59m. There are 4705 mi between London and Idaho Falls. Both multi-stop and direct flights can be found to your destination and back.

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

    Our cheapest airline available from London to Idaho Falls is United Airlines. Our recent data shows that you can find tickets from as low as £872 on this airline.

  • Can I find deals for flights from London to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on London to Idaho Falls flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Idaho Falls.

  • Can I find deals for business class flights from London to Idaho Falls?

    Yes. Cheapflights offers flight deals from London 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

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Top airline flying from London to Idaho Falls

Discover the top airline that operate flights from London 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 28 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£872Average£1,027FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Deals for London to Idaho Falls flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Idaho Falls?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Idaho Falls for you. Better yet — we are completely free to use.

Can Cheapflights find flights from London to Idaho Falls with no change fees?

Certainly. Search results for flights to Idaho Falls from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to Idaho Falls become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Idaho Falls from London today and book when prices fit your budget.

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