HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Keflavik Intl

$513+ Cheap flights from Idaho to Keflavik Intl (KEF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — KEF
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to Keflavik Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Idaho to Keflavik Intl

Keep the following information in mind while searching for Idaho to Keflavik Intl flight deals. Data was last updated septiembre 11, 2025.

Round-trip from

$520
(Trip.com)

One-way from

$513
(KAYAK)

Popular in

December

Cheapest in

February

Average price

$987
From Idaho to Reykjavik Keflavik Intl
Search Deals
One-way flight from Idaho to Reykjavik Keflavik Intl
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Idaho to Keflavik Intl

Cheapest flights from Idaho to Keflavik Intl
Explore the most affordable flight options available from Idaho to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/74:25 pmBOI - KEF
1 stop11h 00mMultiple Airlines
mié. 10/154:50 pmKEF - BOI
1 stop12h 15mMultiple Airlines
Deal found 9/10$520
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/57:35 amGEG - KEF
1 stop14h 40mMultiple Airlines
mié. 11/195:00 pmKEF - GEG
1 stop15h 22mMultiple Airlines
Deal found 9/9$541
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/610:05 amBOI - KEF
1 stop13h 10mMultiple Airlines
vie. 11/145:00 pmKEF - BOI
1 stop12h 20mMultiple Airlines
Deal found 9/10$625
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/1311:43 amBOI - KEF
1 stop11h 32mMultiple Airlines
lun. 11/175:00 pmKEF - BOI
1 stop12h 20mMultiple Airlines
Deal found 9/10$666
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/1711:21 amGEG - KEF
1 stop14h 09mUnited Airlines
mar. 9/239:50 amKEF - GEG
2 stops55h 49mUnited Airlines
Deal found 9/10$673
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/711:43 amBOI - KEF
1 stop11h 32mMultiple Airlines
vie. 11/145:00 pmKEF - BOI
1 stop12h 20mMultiple Airlines
Deal found 9/10$678
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/242:28 pmBOI - KEF
1 stop12h 57mMultiple Airlines
mié. 10/17:45 pmKEF - BOI
1 stop20h 52mMultiple Airlines
Deal found 9/10$708
This Orbitz deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/610:39 amBOI - KEF
2 stops22h 06mLufthansa
vie. 11/144:50 pmKEF - BOI
2 stops35h 46mLufthansa
Deal found 9/10$717
This Ovago deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/710:39 amBOI - KEF
2 stops29h 56mLufthansa
vie. 11/144:50 pmKEF - BOI
2 stops35h 46mLufthansa
Deal found 9/10$727
This Priceline deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/177:23 amGEG - KEF
2 stops41h 47mMultiple Airlines
lun. 9/2212:25 amKEF - GEG
2 stops29h 40mMultiple Airlines
Deal found 9/10$740
This Expedia deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/133:54 pmBOI - KEF
2 stops25h 01mScandinavian Airlines
lun. 11/1711:30 amKEF - BOI
2 stops42h 24mScandinavian Airlines
Deal found 9/10$742
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/27:15 amGEG - KEF
2 stops17h 55mMultiple Airlines
mié. 10/1512:25 amKEF - GEG
2 stops29h 50mMultiple Airlines
Deal found 9/10$860

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Keflavik Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
Use the filters below to find and compare flights from Idaho to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Idaho

Fly to

Keflavik Intl

Route

Depart

Return

Price

SpokaneReykjavik

GEG - KEF

GEGKEF

Spokane

mié. 11/5

7:35 am-6:15 am

1 stop14h 40m

Reykjavik Keflavik Intl

mié. 11/19

5:00 pm-12:22 am

1 stop15h 22m

$541

BoiseReykjavik

BOI - KEF

BOIKEF

Boise Air Term. Gowen Fld

jue. 11/13

7:30 am-6:15 am

2 stops15h 45m

Reykjavik Keflavik Intl

lun. 11/17

5:00 pm-10:20 pm

1 stop12h 20m

$705

BoiseReykjavik

BOI - KEF

BOIKEF

Boise Air Term. Gowen Fld

vie. 11/7

5:54 am-6:15 am

2 stops17h 21m

Reykjavik Keflavik Intl

vie. 11/14

5:00 pm-10:20 pm

1 stop12h 20m

$705

BoiseReykjavik

BOI - KEF

BOIKEF

Boise Air Term. Gowen Fld

jue. 11/6

10:39 am-3:45 pm

2 stops22h 06m

Reykjavik Keflavik Intl

vie. 11/14

4:50 pm-9:36 pm

2 stops35h 46m

$717

BoiseReykjavik

BOI - KEF

BOIKEF

Boise Air Term. Gowen Fld

mié. 9/24

5:00 am-8:15 am

2 stops21h 15m

Reykjavik Keflavik Intl

mié. 10/1

9:30 am-6:47 pm

2 stops39h 17m

$771

BoiseReykjavik

BOI - KEF

BOIKEF

Boise Air Term. Gowen Fld

mié. 9/24

5:00 am-8:15 am

2 stops21h 15m

Reykjavik Keflavik Intl

mié. 10/1

9:30 am-11:44 pm

2 stops44h 14m

$771

BoiseReykjavik

BOI - KEF

BOIKEF

Boise Air Term. Gowen Fld

vie. 11/7

4:00 pm-10:45 am

2 stops35h 45m

Reykjavik Keflavik Intl

vie. 11/14

11:30 am-10:54 pm

2 stops42h 24m

$802

SpokaneReykjavik

GEG - KEF

GEGKEF

Spokane

jue. 10/2

7:15 am-8:10 am

2 stops17h 55m

Reykjavik Keflavik Intl

mié. 10/15

12:25 am-11:15 pm

2 stops29h 50m

$860

SpokaneReykjavik

GEG - KEF

GEGKEF

Spokane

sáb. 10/25

6:02 am-9:15 am

2 stops44h 13m

Reykjavik Keflavik Intl

sáb. 11/1

6:00 pm-9:55 pm

2 stops34h 55m

$863

SpokaneReykjavik

GEG - KEF

GEGKEF

Spokane

jue. 11/6

7:35 am-6:15 am

1 stop14h 40m

Reykjavik Keflavik Intl

vie. 11/7

5:00 pm-10:59 pm

1 stop13h 59m

$960

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 22 results
1
2
3

Best time to book a flight from Idaho to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from Idaho with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Reykjavik Keflavik Intl Airport

What is the cheapest time of day to fly from ID to KEF?

Find hourly flight availability from Idaho to Keflavik Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Reykjavik Keflavik Intl Airport as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Keflavik Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Idaho to Reykjavik Keflavik Intl Airport?

    Airlines like Lufthansa and Virgin Atlantic fly from Idaho to Reykjavik Keflavik Intl Airport in about 22h 06m. The time it takes to get you to your destination can typically vary by up to 16h 24m. There are 3672 mi between Idaho and Reykjavik Keflavik Intl Airport. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Idaho to Reykjavik Keflavik Intl Airport?

    Most travelers choose Boise Air Term. Gowen Fld - Reykjavik Keflavik Intl, Spokane - Reykjavik Keflavik Intl or Jackson Hole - Reykjavik Keflavik Intl when deciding on the best route from Idaho to Reykjavik Keflavik Intl Airport.

  • Can I find deals for flights from Idaho to Keflavik Intl that include hotel bookings?

    Yes. In addition to deals on Idaho to Keflavik Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Keflavik Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Keflavik Intl.

  • Can I find deals for business class flights from Idaho to Keflavik Intl?

    Yes. Cheapflights offers flight deals from Idaho to Keflavik Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to Reykjavik Keflavik Intl Airport?

    Currently, November is the cheapest month in which you can book a flight from Idaho to Reykjavik Keflavik Intl Airport (average of $328). Flying from Idaho to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $655). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Keflavik
Hveragerdi

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Idaho to Keflavik Intl

Discover the top airline that operate flights from Idaho to Keflavik Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$386Average$1,029FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.