$733 Cheap Flights from Reykjavik (KEF) to Idaho Falls (IDA)

View $733 flight on Sat, Jul 25, 2026Opens in a new window

Popular airlines from Reykjavik–Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA)

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

Prices were available within the past 7 days and start at $733 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Reykjavik (KEF) to Idaho Falls (IDA)
Origin airport
Keflavik Intl.
Destination airport
Idaho Falls Regional
Distance
3561 mi

Reykjavik to Idaho Falls Flights

The cheapest times to fly from Reykjavik to Idaho Falls

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Reykjavik to Idaho Falls are during the month of . You can find some of the cheapest flights from Reykjavik to Idaho Falls with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Reykjavik to Idaho Falls

Sunday is one of the best days to book for cheap flights from Reykjavik to Idaho Falls: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Reykjavik to Idaho Falls

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Reykjavik to Idaho Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $733 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Reykjavik to Idaho Falls flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Reykjavik to Idaho Falls airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA) cost?
Grab a cheap one-way flight from $733 or cheap return flight from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA)?
is the cheapest month to fly from KEF to IDA. Traveling during an off-peak travel window is often the key to scoring lower fares.
What is the cheapest airline that flies from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA)?
To find the cheapest airline flying from KEF to IDA, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA)?
There aren't any daily nonstop flights available from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from KEF to IDA?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on a number of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA)?
To avoid possible delays on the Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA) route, travel before 3 PM. Later departures have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA) last-minute?
Booking your ticket from KEF to IDA shortly before your getaway is typically more expensive. But if you're flexible with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a KEF to IDA flight and hotel package?
Compared with arranging hotels and flights separately, booking a KEF to IDA flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place takes the hassle out of travel planning. Simply secure your flights and select from our extensive range of hotels, then tailor your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Keflavik Intl. Airport (KEF) to Idaho Falls Regional Airport (IDA)?
Usually, it's possible to cancel or reschedule your KEF to IDA flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.