LON - IDA

£456 Find Cheap Flights from London to Idaho Falls

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Idaho Falls departing on 16/10. 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

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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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London 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 London to Idaho Falls

Thu, 30 Oct - Thu, 6 Nov
 Logo
10:05 - 21:49LHR-IDA
17h 44m1 stop
 Logo
13:58 - 11:40IDA-LHR
14h 42m1 stop
Sat, 22 Nov - Wed, 26 Nov
American Airlines Logo
14:25 - 22:34LHR-IDA
15h 09m1 stop
American Airlines Logo
07:10 - 20:00IDA-LHR
29h 50m2 stops
£595American Airlines
Find Deal
Sat, 22 Nov - Wed, 26 Nov
Delta Logo
06:20 - 18:17LHR-IDA
18h 57m2 stops
Delta Logo
06:00 - 10:00IDA-LHR
21h 00m1 stop
£601Delta
Find Deal
Sat, 22 Nov - Wed, 26 Nov
American Airlines Logo
10:05 - 22:34LHR-IDA
19h 29m2 stops
American Airlines Logo
07:10 - 20:00IDA-LHR
29h 50m2 stops
£602American Airlines
Find Deal
Sat, 22 Nov - Wed, 26 Nov
American Airlines Logo
10:05 - 22:34LHR-IDA
19h 29m2 stops
American Airlines Logo
07:10 - 20:00IDA-LHR
29h 50m2 stops
£603American Airlines
Find Deal
Sat, 22 Nov - Wed, 26 Nov
Delta Logo
10:45 - 22:33LHR-IDA
18h 48m1 stop
Delta Logo
06:00 - 10:00IDA-LHR
21h 00m1 stop
£610Delta
Find Deal
Sat, 22 Nov - Wed, 26 Nov
Delta Logo
10:45 - 18:17LHR-IDA
14h 32m1 stop
Delta Logo
06:00 - 10:00IDA-LHR
21h 00m1 stop
£611Delta
Find Deal
Thu, 30 Oct - Thu, 6 Nov
British Airways Logo
11:15 - 12:41LHR-IDA
31h 26m2 stops
British Airways Logo
07:10 - 10:25IDA-LHR
20h 15m2 stops
£642British Airways
Find Deal
Sat, 22 Nov - Wed, 26 Nov
United Airlines Logo
11:10 - 22:52LHR-IDA
18h 42m2 stops
United Airlines Logo
05:00 - 05:55IDA-LHR
17h 55m2 stops
£663United Airlines
Find Deal
Wed, 29 Oct - Wed, 5 Nov
United Airlines Logo
07:30 - 21:03LHR-IDA
19h 33m2 stops
United Airlines Logo
14:45 - 09:40IDA-LHR
11h 55m1 stop
£665United Airlines
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from £595 (return)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest return fare
£594
Multi-carrier
Thu 30/10Thu 6/11
LHR - IDA • 1 stop
Cheapest one-way flight
£456
Multi-carrier
Thu 16/10
LHR - IDA • 2 stops
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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!
Booking Insights

KAYAK's insights & trends for London to Idaho Falls flights

Get data-powered insights and trends into flights from London 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 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 to Idaho Falls were found on American Airlines (£595) and Delta (£601).

Good to know - Cheap tickets from London to Idaho Falls

Low seasonNovember
Cheapest flight£456
Best time to beat the crowds (19% less expensive on average)
Most popular time to fly (25% more expensive on average)
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
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 flights from London to Idaho Falls

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

    In the last 3 days, the lowest price for a flight from London to Idaho Falls was £620 for a one-way ticket and £807 for a return.

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

    On your way to Idaho Falls, you’ll fly out from one of these London airports: London Gatwick or London Heathrow. You’ll be landing at Idaho Falls Fanning Field.

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

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

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

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between London and Idaho Falls, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from London to Idaho Falls, Virgin Atlantic or United Airlines?

    The two airlines most popular with KAYAK users for flights from London to Idaho Falls are Virgin Atlantic and United Airlines. With an average price for the route of £848 and an overall rating of 7.4, Virgin Atlantic is the most popular choice. United Airlines is also a great choice for the route, with an average price of £1,041 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from London 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 to Idaho Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London 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 is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from London 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 London 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 8929 reviews
7.3Comfort
6.6Food
7.7Boarding
8.1Crew
7.1Entertainment
Airline reviews

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

6.0 GoodKaren Andrea, Sept 2025IAH - MCO
Read more United Airlines reviews

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

My flight was delayed about 1 1/2 hours in Chicago, but other then that it was a good flight.

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

Food was excellent. Service was very good. Staff was very helpful to all passengers.

The crew was excellent as ever on Virgin. The special meal was poor unfortunately. More significantly when we arrived at Manchester Airport there was no air bridge provided and we had to exit the plane down a rickety stair case. This is unacceptable for a transatlantic flight. Whilst I understand that this is the airport’s fault at the end of the day the airline is responsible for our transportation and needs to do something.

Super friendly and helpful staff, from check-in desk to cabin crew.

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

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