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Cheap flights from London to Idaho Falls from £501

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IDA
7 Jul — 14 Jul1
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 7 June 2026.

Tue 1/910:05
LHR
-
IDA
1 stop18h 15m
American Airlines
Fri 25/912:15
IDA
-
LHR
1 stop15h 40m
American Airlines
Deal found 6/6£832
Tue 1/912:55
LHR
-
IDA
1 stop15h 25m
Multiple Airlines
Fri 25/907:00
IDA
-
LHR
1 stop20h 55m
Multiple Airlines
Deal found 3/6£840
Tue 1/906:15
LHR
-
IDA
2 stops19h 05m
Delta
Fri 25/918:57
IDA
-
LHR
2 stops18h 13m
Delta
Deal found 6/6£845
Tue 1/915:40
LGW
-
IDA
2 stops38h 16m
Multiple Airlines
Fri 25/906:18
IDA
-
LGW
2 stops25h 22m
Multiple Airlines
Deal found 6/6£876
Tue 1/913:00
LGW
-
IDA
2 stops16h 56m
Icelandair
Fri 25/914:01
IDA
-
LGW
2 stops17h 39m
Icelandair
Deal found 4/6£960
Thu 23/715:40
LGW
-
IDA
2 stops37h 59m
Multiple Airlines
Fri 31/716:14
IDA
-
LGW
2 stops15h 26m
Multiple Airlines
Deal found 2/6£1,276
Tue 23/613:00
LGW
-
IDA
2 stops16h 39m
Multiple Airlines
Thu 9/713:43
IDA
-
LGW
2 stops17h 57m
Multiple Airlines
Deal found 3/6£1,299
Mon 20/715:40
LGW
-
IDA
2 stops37h 59m
Multiple Airlines
Mon 27/713:43
IDA
-
LGW
2 stops17h 57m
Multiple Airlines
Deal found 4/6£1,599
Thu 2/713:00
LGW
-
IDA
2 stops16h 39m
Multiple Airlines
Tue 1/914:01
IDA
-
LGW
2 stops17h 39m
Multiple Airlines
Deal found 6/6£1,633

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 7 June 2026.

Round-trip from

£832

One-way from

£501
American Airlines
  • American Airlines
  • 1/9-25/9
  • 2 total stops
  • 33h 55m total
  • London to Idaho Falls
Search Deals
4/9
  • 4/9
  • 3 total stops
  • 34h 34m 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 7 June 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

12:55-21:20

1 stop15h 25m

Idaho Falls Fanning Field

Fri 25/9

14:08-14:25

1 stop17h 17m

£833

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

06:15-18:20

2 stops19h 05m

Idaho Falls Fanning Field

Fri 25/9

18:57-20:10

2 stops18h 13m

£845

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 4/9

11:45-10:50

2 stops30h 05m

Idaho Falls Fanning Field

Sat 19/9

18:57-06:45

2 stops28h 48m

£871

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 30/9

17:00-15:20

1 stop29h 20m

Idaho Falls Fanning Field

Sun 4/10

13:46-15:05

1 stop18h 19m

£875

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

15:40-22:56

2 stops38h 16m

Idaho Falls Fanning Field

Fri 25/9

06:18-14:40

2 stops25h 22m

£876

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 10/7

17:00-15:37

1 stop29h 37m

Idaho Falls Fanning Field

Fri 28/8

14:01-15:05

1 stop18h 04m

£909

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 30/9

07:30-09:53

2 stops33h 23m

Idaho Falls Fanning Field

Sun 4/10

17:53-07:45

2 stops30h 52m

£932

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

£1,276

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Mon 20/7

15:40-22:39

2 stops37h 59m

Idaho Falls Fanning Field

Mon 27/7

13:43-14:40

2 stops17h 57m

£1,599

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Fri 10/7

15:40-22:39

2 stops37h 59m

Idaho Falls Fanning Field

Fri 28/8

14:01-14:40

2 stops17h 39m

£1,722

Flights are sorted by cheapest return flights first.

Deals found on 6/6

Showing 1-10 of 27 resultsSorted by cheapest first
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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 79% 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 £783.

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: 13h 02m.

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 11m.

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 £833, American Airlines can have you in Idaho Falls from London in 15h 25m. There are 4705 mi between London and Idaho Falls. Both multi-stop and direct flights can be found to your destination and back.

  • 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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