LON - IDA

£692 Find Cheap Flights from London to Idaho Falls – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£729
Typical prices: £821-£1,142
Alaska Airlines
Sun 28/1Thu 1/2
LHR - IDA • 1 stop
Cheapest one-way flight
£692
Typical prices: £517-£872
Alaska Airlines
Mon 8/1
LHR - IDA • 1 stop
Direct flights
Not available
There are currently no direct flights between London and Idaho Falls. You'll need to take a connecting flight to reach the destination.
Insights
Insights
Top routes
LGW - IDA
Cheapest • 20% average savings
LHR - IDA
Most popular
Insights
Insights
When to travel
January
Cheapest • 32% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Seattle/Tacoma Intl (SEA)
Cheapest • Avg £748 (return)
Denver Intl (DEN)
Shortest trip • 12h 27m (one-way)
Insights
Insights
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We hope you enjoy your trip to Idaho Falls!
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Flight Deals

Cheap Flights from London to Idaho Falls (LON-IDA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from London to Idaho Falls

Thu, 28 Jan - Mon, 1 Feb
Alaska Airlines Logo
14:45 - 15:21LHR  London Heathrow-IDA Idaho Falls Fanning Field
31h 36m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
08:00 - 12:20IDA  Idaho Falls Fanning Field-LHR London Heathrow
21h 20m1 stop Seattle/Tacoma Intl
£729Alaska Airlines
Thu, 28 Jan - Mon, 1 Feb
Alaska Airlines Logo
14:45 - 15:21LHR  London Heathrow-IDA Idaho Falls Fanning Field
31h 36m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
13:56 - 12:20IDA  Idaho Falls Fanning Field-LHR London Heathrow
15h 24m1 stop Seattle/Tacoma Intl
£730Alaska Airlines
Thu, 28 Jan - Mon, 1 Feb
Alaska Airlines Logo
14:45 - 15:21LHR  London Heathrow-IDA Idaho Falls Fanning Field
31h 36m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
08:00 - 12:20IDA  Idaho Falls Fanning Field-LHR London Heathrow
21h 20m1 stop Seattle/Tacoma Intl
£731Alaska Airlines
Wed, 18 Nov - Sun, 22 Nov
Finnair Logo
17:15 - 21:51LHR  London Heathrow-IDA Idaho Falls Fanning Field
35h 36m2 stops Toronto Pearson Intl Dallas/Fort Worth
Finnair Logo
13:43 - 07:50IDA  Idaho Falls Fanning Field-LHR London Heathrow
35h 07m2 stops Dallas/Fort Worth Philadelphia
£856Finnair
Wed, 18 Nov - Sun, 22 Nov
Finnair Logo
17:15 - 21:51LHR  London Heathrow-IDA Idaho Falls Fanning Field
35h 36m2 stops Toronto Pearson Intl Dallas/Fort Worth
Finnair Logo
13:43 - 06:50IDA  Idaho Falls Fanning Field-LHR London Heathrow
34h 07m1 stop Dallas/Fort Worth
£856Finnair
Mon, 14 Dec - Mon, 21 Dec
American Airlines Logo
11:15 - 13:11LGW  London Gatwick-IDA Idaho Falls Fanning Field
32h 56m2 stops Orlando Dallas/Fort Worth
American Airlines Logo
06:00 - 07:30IDA  Idaho Falls Fanning Field-LGW London Gatwick
18h 30m2 stops Dallas/Fort Worth Orlando
£894American Airlines
Wed, 18 Nov - Sun, 22 Nov
American Airlines Logo
10:05 - 21:43LHR  London Heathrow-IDA Idaho Falls Fanning Field
18h 38m1 stop Dallas/Fort Worth
American Airlines Logo
08:00 - 08:15IDA  Idaho Falls Fanning Field-LHR London Heathrow
17h 15m1 stop Dallas/Fort Worth
£921American Airlines
Tue, 15 Dec - Tue, 22 Dec
Finnair Logo
08:20 - 21:49LHR  London Heathrow-IDA Idaho Falls Fanning Field
20h 29m1 stop Dallas/Fort Worth
Finnair Logo
06:00 - 08:15IDA  Idaho Falls Fanning Field-LHR London Heathrow
19h 15m1 stop Dallas/Fort Worth
£924Finnair
Thu, 28 Jan - Mon, 1 Feb
United Airlines Logo
06:35 - 21:10LHR  London Heathrow-IDA Idaho Falls Fanning Field
21h 35m2 stops Munich Franz Josef Strauss Denver Intl
United Airlines Logo
07:00 - 06:40IDA  Idaho Falls Fanning Field-LHR London Heathrow
16h 40m2 stops Denver Intl Washington, D.C. Dulles Intl
£1,010United Airlines
Thu, 28 Jan - Mon, 1 Feb
United Airlines Logo
06:35 - 21:10LHR  London Heathrow-IDA Idaho Falls Fanning Field
21h 35m2 stops Munich Franz Josef Strauss Denver Intl
United Airlines Logo
14:30 - 09:40IDA  Idaho Falls Fanning Field-LHR London Heathrow
12h 10m1 stop Denver Intl
£1,010United Airlines
Booking Insights

Price, demand, and travel trends for London to Idaho Falls flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a return flight from London to Idaho Falls?

Return flights from London to Idaho Falls typically range from £821 to £1,142. The lowest price found in the past 5 days was £729 on Alaska Airlines.

What is the cheapest London to Idaho Falls flight route?

London Gatwick Airport (LGW) to Idaho Falls (IDA) is the cheapest London to Idaho Falls route, averaging £697 return. Other London to Idaho Falls routes average £1,055, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from London to Idaho Falls?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from London to Idaho Falls. It's 31% cheaper than the average day, while Monday is the most expensive, with prices 27% higher.

Find deals

Key details for London to Idaho Falls flights

Low season

October

Cheapest flight

£692
Beat the crowds with an average 75% drop in traveller numbers.
The most popular month to fly with an average 124% increase in traveller numbers.
One-way flight from London Heathrow Airport to Idaho Falls

When to book flights from London to Idaho Falls

Are your dates flexible? Find out the best times to travel from London to Idaho Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your London to Idaho Falls flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from London to Idaho Falls?

    Only Economy class is available on flights from London to Idaho Falls.

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

    A direct flight from London to Idaho Falls takes 00m, covering 4,714 miles.

  • Do I need a passport to fly from London to Idaho Falls?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a London to Idaho Falls flight?

    Return flights from London to Idaho Falls range from £821 to £1,142, with an average of £1,026 over the past 12 months. Anything below £821 counts as a good deal.

  • Have flight prices from London to Idaho Falls changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £729 to £4,874. That means the highest observed fare was about 7x higher than the lowest one.

  • How are flight prices from London to Idaho Falls looking right now?

    One-way fares from London to Idaho Falls are currently higher than usual. Average one-way flight prices are about £692, which is 14% above the typical average for this route.

  • Which car hire options are available at Idaho Falls Fanning Field Airport (IDA)?

    Idaho Falls Fanning Field Airport (IDA) hosts 5 major car hire companies, with daily rates averaging £72 for economy cars. Top options include:

    • Alamo
    • Hertz
    • Enterprise Rent-A-Car
    • National
    • Budget

  • Which airports can I use when flying from London to Idaho Falls?

    Flights from London to Idaho Falls may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN). Flights usually arrive at Idaho Falls Fanning Field (IDA).

  • Which airports do connecting flights from London to Idaho Falls pass through?

    One-stop flights from London to Idaho Falls most commonly connect through:

    • Denver Intl (DEN) – 60% of one-stop connections
    • Salt Lake City (SLC) – 19% of one-stop connections
    • Seattle/Tacoma Intl (SEA) – 12% of one-stop connections
    • Dallas/Fort Worth (DFW) – 9% of one-stop connections

  • Can I save money by using flexible dates for flights from London to Idaho Falls?

    Yes. Flexible dates can save you up to 46% on flights from London to Idaho Falls. Wednesday is the cheapest departure day at £715 return on average, while Monday is the most expensive at £1,305, a difference of £590.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different stopover airport from London to Idaho Falls?

    Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time of 12h 27m, compared to 13h 46m via Salt Lake City (SLC) and 15h 12m via Dallas/Fort Worth (DFW).

  • What is the time difference between London and Idaho Falls?

    Idaho Falls is 7 hours behind London (Mountain Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking London to Idaho Falls flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Monday. On this route, Wednesday flights average £715, about £590 less than Monday fares (45% savings) based on the last 12 months.
  • If you can choose when to travel, plan your London to Idaho Falls trip for January. Fares historically average £697 return in that month – typically £461 less than the most expensive month, which is August (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Idaho Falls Fanning Field Airport.

    • Comfort Suites Idaho Falls
    • Best Western Plus CottonTree Inn
    • Quality Inn Idaho Falls

More options for your flight from London to Idaho Falls

Complete your trip to Idaho Falls with a hotel stay or car hire

Car hire in Idaho Falls
Hotels in Idaho Falls