LHR - IDA

£568 Find Cheap Flights from London Heathrow Airport to Idaho Falls – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£714
Typical prices: £863-£1,153
Multiple Airlines
Mon 22/10Wed 31/10
LHR - IDA • 2 stops
Cheapest one-way flight
£568
Typical prices: £518-£875
Alaska Airlines
Mon 8/1
LHR - IDA • 1 stop
Direct flights
Not available
There are currently no direct flights between London Heathrow Airport and Idaho Falls. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
January
Cheapest • 33% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Seattle/Tacoma Intl (SEA)
Cheapest • Avg £769 (return)
Denver Intl (DEN)
Shortest trip • 12h 25m (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 Heathrow to Idaho Falls (LHR-IDA)

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

Recent return flight deals from Heathrow to Idaho Falls

Thu, 22 Oct - Sat, 31 Oct
Multiple Airlines Logo
06:30 - 22:59LHR  London Heathrow-IDA Idaho Falls Fanning Field
23h 29m2 stops Frankfurt am Main Seattle/Tacoma Intl
Multiple Airlines Logo
06:09 - 11:50IDA  Idaho Falls Fanning Field-LHR London Heathrow
47h 41m2 stops Seattle/Tacoma Intl Vancouver Intl
£714Multiple 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
£808Alaska 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
£811Alaska 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
£812Alaska Airlines
Thu, 22 Oct - Sat, 31 Oct
Alaska Airlines Logo
17:00 - 15:20LHR  London Heathrow-IDA Idaho Falls Fanning Field
29h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
13:58 - 12:20IDA  Idaho Falls Fanning Field-LHR London Heathrow
16h 22m1 stop Seattle/Tacoma Intl
£818Alaska Airlines
Mon, 5 Oct - Sun, 11 Oct
Finnair Logo
16:25 - 21:42LHR  London Heathrow-IDA Idaho Falls Fanning Field
36h 17m1 stop Dallas/Fort Worth
Finnair Logo
13:39 - 06:15IDA  Idaho Falls Fanning Field-LHR London Heathrow
33h 36m2 stops Dallas/Fort Worth Toronto Pearson Intl
£820Finnair
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
£844Alaska Airlines
Mon, 5 Oct - Sun, 11 Oct
Finnair Logo
16:55 - 21:42LHR  London Heathrow-IDA Idaho Falls Fanning Field
35h 47m2 stops Los Angeles Los Angeles Dallas/Fort Worth
Finnair Logo
13:39 - 06:15IDA  Idaho Falls Fanning Field-LHR London Heathrow
33h 36m2 stops Dallas/Fort Worth Toronto Pearson Intl
£848Finnair
Thu, 28 Jan - Mon, 1 Feb
United Airlines Logo
06:35 - 21:08LHR  London Heathrow-IDA Idaho Falls Fanning Field
21h 33m2 stops Munich Franz Josef Strauss Denver Intl
United Airlines Logo
10:45 - 10:15IDA  Idaho Falls Fanning Field-LHR London Heathrow
16h 30m2 stops Denver Intl Houston George Bush Intcntl
£974United Airlines
Thu, 28 Jan - Mon, 1 Feb
United Airlines Logo
06:35 - 21:08LHR  London Heathrow-IDA Idaho Falls Fanning Field
21h 33m2 stops Munich Franz Josef Strauss Denver Intl
United Airlines Logo
10:45 - 10:15IDA  Idaho Falls Fanning Field-LHR London Heathrow
16h 30m2 stops Denver Intl Houston George Bush Intcntl
£976United Airlines
Booking Insights

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

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from London Heathrow Airport to Idaho Falls with more confidence.

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

Wednesday is the cheapest day of the week to fly from London Heathrow Airport to Idaho Falls and is 33% cheaper than the average day. Monday is the most expensive day with flight prices 24% higher than average. Based on deals found by KAYAK users in the last 12 months.

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Key details for London Heathrow Airport to Idaho Falls flights

Low season

October

Cheapest flight

£568
Best time to beat the crowds (23% less expensive on average)
Most popular time to fly (9% more expensive on average)
Flights from London Heathrow Airport to Idaho Falls

When to book flights from Heathrow to Idaho Falls

Are your dates flexible? Find out the best times to travel from Heathrow 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 Heathrow Airport to Idaho Falls flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

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

    Flights from London Heathrow Airport to Idaho Falls usually depart from London Heathrow (LHR) and arrive at Idaho Falls Fanning Field (IDA).

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

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

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

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

    • Denver Intl (DEN) – 61% of one-stop connections
    • Salt Lake City (SLC) – 22% of one-stop connections
    • Dallas/Fort Worth (DFW) – 8% of one-stop connections
    • Seattle/Tacoma Intl (SEA) – 8% of one-stop connections

    Denver Intl (DEN) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 46% on the London Heathrow Airport to Idaho Falls route. Wednesday is the cheapest departure day at £717 return on average, while Monday is the most expensive at £1,309, a difference of £592. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

    A direct flight from London Heathrow Airport to Idaho Falls takes 0h 00m, covering 4,705 miles.

  • Do I need a passport to fly from London Heathrow Airport 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.

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

    Yes. Based on fares seen in the past 5 days, return prices on this route varied from about £714 to £980. That means the highest observed fare was about 37% higher than the lowest one.

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

    One-way fares from London Heathrow Airport to Idaho Falls are currently lower than usual. Average one-way flight prices are about £568, which is 10% below the typical average for this route.

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

    Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time of 12h 25m, compared to 13h 54m via Salt Lake City (SLC) and 15h 12m via Dallas/Fort Worth (DFW).

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

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

  • 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 starting from around £25 for economy cars. Top options include:
    • Alamo
    • Hertz
    • Enterprise Rent-A-Car
    • Budget
    • National

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

    Return flights from London Heathrow Airport to Idaho Falls range from £863 to £1,153, with an average of £1,055 over the past 12 months. Anything below £863 counts as a good deal.

Your guide to booking London Heathrow Airport 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 instead of Monday. On this route, Wednesday flights average £717 – about £592 less than Monday (45% savings) based on the last 12 months.
  • If you can choose when to travel, plan your London Heathrow Airport to Idaho Falls trip for January. Fares historically average £707 return in that month – typically £454 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.
    - Quality Inn Idaho Falls
    - Best Western Driftwood Inn
    - Comfort Suites Idaho Falls

More options for your flight from Heathrow 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