LHR - IDA

£814 Find Cheap Flights from London Heathrow Airport to Idaho Falls

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Idaho Falls departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Idaho Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Idaho Falls, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
£814
Multiple Airlines
Tue 1/9Fri 25/9
LHR - IDA • 2 stops
Top airlines
Alaska Airlines
Cheapest • from £836 (return)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Heathrow and Idaho Falls. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
Dallas (DFW)
Cheapest • Avg £759 (return)
Denver (DEN)
Shortest trip • 12h 55m (one-way)
Insights
Insights
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Insights
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Idaho Falls!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to Idaho Falls (LHR-IDA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Idaho Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Idaho Falls

Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
13:05 - 22:56
LHR
-
IDA
16h 51m
2 stops
Multiple Airlines Logo
06:18 - 20:20
IDA
-
LHR
31h 02m
2 stops
£814Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
13:05 - 22:56
LHR
-
IDA
16h 51m
2 stops
Multiple Airlines Logo
06:18 - 20:20
IDA
-
LHR
31h 02m
2 stops
£817Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
13:05 - 22:56
LHR
-
IDA
16h 51m
2 stops
Multiple Airlines Logo
06:18 - 20:20
IDA
-
LHR
31h 02m
2 stops
£830Multiple Airlines
Tue, 9 Jun - Tue, 16 Jun
Alaska Airlines Logo
17:00 - 15:37
LHR
-
IDA
29h 37m
1 stop
Alaska Airlines Logo
07:15 - 15:05
IDA
-
LHR
24h 50m
1 stop
£836Alaska Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
12:55 - 21:20
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
14:20 - 10:55
IDA
-
LHR
13h 35m
1 stop
£842Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
12:55 - 21:20
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
12:12 - 10:55
IDA
-
LHR
15h 43m
1 stop
£846Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
Multiple Airlines Logo
12:55 - 21:20
LHR
-
IDA
15h 25m
1 stop
Multiple Airlines Logo
07:00 - 10:55
IDA
-
LHR
20h 55m
1 stop
£848Multiple Airlines
Tue, 1 Sep - Fri, 25 Sep
KLM Logo
09:55 - 22:14
LHR
-
IDA
19h 19m
2 stops
KLM Logo
18:50 - 10:00
IDA
-
LHR
32h 10m
1 stop
£859KLM
Tue, 1 Sep - Fri, 25 Sep
KLM Logo
09:55 - 22:14
LHR
-
IDA
19h 19m
2 stops
KLM Logo
18:50 - 10:00
IDA
-
LHR
32h 10m
1 stop
£871KLM
Tue, 1 Sep - Fri, 25 Sep
KLM Logo
09:55 - 22:14
LHR
-
IDA
19h 19m
2 stops
KLM Logo
18:50 - 10:00
IDA
-
LHR
32h 10m
1 stop
£874KLM
Booking Insights

KAYAK’s insights & trends for Heathrow to Idaho Falls flights

Get data-powered insights and trends into flights from Heathrow to Idaho Falls to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from London Heathrow Airport to Idaho Falls?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest return tickets from London Heathrow Airport to Idaho Falls were found on Alaska Airlines (£836) and KLM (£859).

Find deals

Good to know - Cheap tickets from London Heathrow Airport to Idaho Falls

Cheapest flight£814
Flight 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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking London Heathrow Airport to Idaho Falls flights

  • What is the cheapest flight from London Heathrow Airport to Idaho Falls?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Idaho Falls was £814 for a return ticket.

  • Which airports will I be using when flying from London Heathrow Airport to Idaho Falls?

    When flying out of London Heathrow Airport you will be using London Heathrow. You will be landing at Idaho Falls, also known as Idaho Falls Fanning Field.

  • Which aircraft models fly most regularly from London Heathrow Airport to Idaho Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London Heathrow Airport to Idaho Falls?

    Star Alliance is the only airline alliance operating flights between London Heathrow Airport and Idaho Falls.

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Idaho Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Idaho Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Idaho Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Idaho Falls from London Heathrow Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Idaho Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Idaho Falls with an airline and back to London Heathrow Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Idaho Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Idaho Falls from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Heathrow to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from London to Idaho Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Idaho Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9684 reviews
7.1Entertainment
6.6Food
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

6.0 GoodAnonymous, May 2026
DEN - ORD
Read more United Airlines reviews

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

Seats were not super comfortable and food was not good at all. If I had a chance I would definitely fly a different airline. Of course they are better than any budget airline, but not by much.

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

Very friendly and helpful staff on board and United was excellent when I missed my onward flight due to the delay in London. Very well organised meant much less stress

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Everything you need to know for your flight from Heathrow to Idaho Falls

Information on your arrival and departure airports

London Heathrow Airport (LHR)
Idaho Falls (IDA)