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£591 Cheap Flights from Reykjavik (KEF) to Idaho Falls (IDA)

View £591 flight on Wed, 7 Oct 2026Opens in a new window

Flight 1

Popular airlines from Keflavik International Airport (KEF) to Idaho Falls Regional Airport (IDA)

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Cheap Flights from Reykjavik (KEF) to Idaho Falls (IDA)

Prices were available within the past 7 days and start at £591 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) cost?
You can find one-way and return flights from KEF to IDA with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when KEF to IDA ticket fares go up or down.
What is the cheapest month to fly from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
The cheapest months to fly from KEF to IDA are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
Enter KEF to IDA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
To find a cheap flight from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
There are approximately 5 connecting flights per day from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional). Some common connection points include Seattle - Tacoma Intl. (SEA), Vantaa (HEL), and Portland Intl. (PDX).
What is the earliest flight from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from KEF to IDA. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
There are no nonstop flights from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional). The journey covers a distance of approximately 5,731 kilometres. Flights with one stop typically take around 12 hours. If your journey involves two or more stops, you can expect the total travel time to be longer, usually around 20 hours. Keep in mind that these are average times, and actual flight durations can vary depending on the specific routing, layover times, and factors like wind patterns.
Can you fly business or first class from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
Select the "Business class" and "First class" filters when looking for KEF to IDA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight with Expedia?
It's easy to earn miles on a Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) at the last minute?
Typically, booking a last minute flight from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight and hotel package?
Securing a Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional)?
If you booked your Reykjavik (KEF-Keflavik Intl.) to Idaho Falls, ID (IDA-Idaho Falls Regional) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Keflavik Intl.
Destination airport
Idaho Falls Regional
Distance
5697 km

Book with confidence

Compare flights from Reykjavik to Idaho Falls easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Reykjavik to Idaho Falls. Operating between them flights per day, 6 airlines cover the route. And fly direct, getting you to Idaho Falls Regional in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Keflavik Intl. to Idaho Falls Regional.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Keflavik Intl. (KEF) to Idaho Falls Regional (IDA)

The easiest way to view the best deals on flights from Reykjavik to Idaho Falls today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Keflavik Intl. to Idaho Falls Regional start at just and range up to .  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Reykjavik and Idaho Falls
  • booking your flight during , the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Reykjavik to Idaho Falls flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Keflavik Intl. to Idaho Falls Regional for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Reykjavik to Idaho Falls easily and book with confidence

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