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Cheap flights from London to Idaho Falls from £583

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IDA
14 Aug — 21 Aug1
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 15 July 2026.

Wed 16/912:55
LHR
-
IDA
1 stop15h 25m
Finnair
Sat 26/913:58
IDA
-
LHR
2 stops33h 22m
Finnair
Deal found 14/7£759
Tue 1/910:05
LHR
-
IDA
1 stop18h 15m
Finnair
Fri 25/907:00
IDA
-
LHR
2 stops20h 15m
Finnair
Deal found 15/7£774
Sat 10/1008:55
LHR
-
IDA
1 stop19h 47m
Finnair
Sun 18/1013:39
IDA
-
LHR
2 stops33h 36m
Finnair
Deal found 10/7£797
Wed 16/910:55
LHR
-
IDA
1 stop18h 27m
KLM
Sat 26/913:05
IDA
-
LHR
1 stop13h 55m
KLM
Deal found 14/7£809
Tue 1/910:55
LHR
-
IDA
1 stop14h 25m
Virgin Atlantic
Fri 25/913:05
IDA
-
LHR
1 stop13h 55m
Virgin Atlantic
Deal found 13/7£829
Tue 1/913:00
LGW
-
IDA
2 stops40h 56m
Multiple Airlines
Fri 25/914:01
IDA
-
LGW
2 stops17h 39m
Multiple Airlines
Deal found 14/7£878
Wed 4/1114:45
LHR
-
IDA
1 stop15h 57m
Alaska Airlines
Fri 6/1113:53
IDA
-
LHR
1 stop15h 27m
Alaska Airlines
Deal found 13/7£887
Wed 16/915:40
LGW
-
IDA
2 stops38h 16m
Multiple Airlines
Sat 26/914:01
IDA
-
LGW
2 stops17h 34m
Multiple Airlines
Deal found 14/7£1,014
Thu 23/715:40
LGW
-
IDA
2 stops37h 59m
Multiple Airlines
Fri 31/716:14
IDA
-
LGW
2 stops15h 26m
Multiple Airlines
Deal found 14/7£1,924

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 15 July 2026.

Round-trip from

£759

One-way from

£583
Finnair
  • Finnair
  • 16/9-26/9
  • 3 total stops
  • 48h 47m total
  • London to Idaho Falls
Search Deals
10/8
  • 10/8
  • 3 total stops
  • 49h 07m 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 15 July 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

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:05-21:20

1 stop18h 15m

Idaho Falls Fanning Field

Fri 25/9

07:00-10:15

2 stops20h 15m

£774

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 10/10

08:55-21:42

1 stop19h 47m

Idaho Falls Fanning Field

Sun 18/10

13:39-06:15

2 stops33h 36m

£797
Fastest return journey

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:55-18:20

1 stop14h 25m

Idaho Falls Fanning Field

Fri 25/9

13:05-10:00

1 stop13h 55m

£829

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

13:00-22:56

2 stops40h 56m

Idaho Falls Fanning Field

Fri 25/9

14:01-14:40

2 stops17h 39m

£878

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 4/11

14:45-23:42

1 stop15h 57m

Idaho Falls Fanning Field

Fri 6/11

13:53-12:20

1 stop15h 27m

£887

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Wed 16/9

15:40-22:56

2 stops38h 16m

Idaho Falls Fanning Field

Sat 26/9

14:01-14:35

2 stops17h 34m

£1,014
Cheapest one-way
Fastest single journey

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Mon 10/8

14:00-15:37

2 stops32h 37m

£623

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 10/8

19:50-13:06

3 stops48h 16m

£784

Flights are sorted by cheapest return flights first.

Deals found on 11/7

Sorted by cheapest first

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 81% 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.

Salt Lake City (SLC) is the most affordable one-stop option, with an average return flight price of £781.

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 54m.

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 05m.

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. 0 airlines have 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 £759, Finnair can have you in Idaho Falls from London in 15h 25m. There are 4705 mi between London and Idaho Falls.

  • 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

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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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