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Cheap flights from London to Idaho Falls from £329

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IDA
16 Jul — 23 Jul1
1 adult

Cheap 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 11 July 2025.

Round-trip from

£648

One-way from

£329

Popular in

May

Cheapest in

November

Average price

£883
American Airlines
  • American Airlines
  • 22/11-26/11
  • 3 total stops
  • 51h 56m total
  • London to Idaho Falls
14/9
  • 14/9
  • 3 total stops
  • 49h 30m total
  • London to Idaho Falls
Highest demand for flights based on searches. 11% potential increase in price (£73 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£15 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from London to Idaho Falls

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 11 July 2025.

Sat 22/1116:30LHR - IDA
1 stop26h 49mAmerican Airlines
Wed 26/1113:50IDA - LHR
1 stop15h 25mAmerican Airlines
Deal found 10/7£648
Sat 22/1106:20LHR - IDA
2 stops18h 54mDelta
Wed 26/1106:05IDA - LHR
2 stops17h 20mDelta
Deal found 9/7£655
Sat 6/913:00LGW - IDA
2 stops16h 39mMultiple Airlines
Sat 13/906:13IDA - LGW
2 stops25h 27mMultiple Airlines
Deal found 9/7£668
Sat 6/910:55LHR - IDA
1 stop14h 16mKLM
Sat 13/913:06IDA - LHR
2 stops18h 09mKLM
Deal found 9/7£695
Sat 6/909:50LHR - IDA
1 stop19h 49mMultiple Airlines
Sat 13/915:57IDA - LHR
1 stop14h 43mMultiple Airlines
Deal found 9/7£701
Mon 25/807:25LHR - IDA
2 stops20h 29mUnited Airlines
Mon 1/916:15IDA - LHR
1 stop34h 25mUnited Airlines
Deal found 11/7£799
Sun 24/815:10LHR - IDA
1 stop28h 06mBritish Airways
Sun 31/813:17IDA - LHR
1 stop34h 08mBritish Airways
Deal found 10/7£997

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 11 July 2025.
Use the filters below to find and compare flights from London to Idaho Falls that are best for you.

Fly from

London

Fly to

Idaho Falls

Route

Depart

Return

Price

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 22/11

16:30-12:19

1 stop26h 49m

Idaho Falls Fanning Field

Wed 26/11

13:50-12:15

1 stop15h 25m

£648

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 22/11

06:20-18:14

2 stops18h 54m

Idaho Falls Fanning Field

Wed 26/11

06:05-06:25

2 stops17h 20m

£655

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Sat 6/9

13:00-22:39

2 stops16h 39m

Idaho Falls Fanning Field

Sat 13/9

06:13-14:40

2 stops25h 27m

£668

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 6/9

10:55-18:11

1 stop14h 16m

Idaho Falls Fanning Field

Sat 13/9

13:06-14:15

2 stops18h 09m

£695

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 6/9

09:50-22:39

1 stop19h 49m

Idaho Falls Fanning Field

Sat 13/9

15:57-13:40

1 stop14h 43m

£701

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 25/8

07:25-20:54

2 stops20h 29m

Idaho Falls Fanning Field

Mon 1/9

16:15-09:40

1 stop34h 25m

£799

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 24/8

15:10-12:16

1 stop28h 06m

Idaho Falls Fanning Field

Sun 31/8

13:17-06:25

1 stop34h 08m

£997

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 14/9

20:50-15:20

3 stops49h 30m

£329

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Wed 16/7

08:50-17:04

3 stops39h 14m

£662

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 17/7

10:55-22:29

1 stop18h 34m

£2,071

Flights are sorted by cheapest return flights first.

Deals found on 9/7

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
No data available for this route at this time. Please check back soon.

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 11 July 2025.
Read through reviews of airlines operating flights from London to Idaho Falls, such as Delta, United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
8.0
Very Good

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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. 3 airlines have flights to Idaho Falls Fanning Field from London on a regular basis.

  • What are the cheapest airlines flying from London to Idaho Falls round-trip?

    Our cheapest airline available from London to Idaho Falls is American Airlines. Our recent data shows that you can find tickets from as low as £648 on this airline. Additional options worth looking into are Delta and United Airlines, starting at £655 and £799 round-trip. American Airlines is 15% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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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Top 3 airlines flying from London to Idaho Falls

Discover the top 3 airlines 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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£584Average£653FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£641Average£947FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£731Average£966FlexibilityNo 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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