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Keflavik Intl

$374+ Cheap flights from Denver (DEN) 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 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KEF
Mar 29 — Apr 51
Sun 3/29
Sun 4/5
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Reykjavik Keflavik Intl are usually found in January or October, booked 20 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from Denver to Keflavik Intl

Cheapest flights from Denver to Keflavik Intl
Explore the most affordable flight options available from Denver to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 27, 2026.

This CrystalTravel deal was found by Cheapflights users on 2/24. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/34:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Fri 4/104:50 pm
KEF
-
DEN
Nonstop8h 10m
Icelandair
Deal found 2/24$532
This CrystalTravel deal was found by Cheapflights users on 2/23. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/314:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Thu 9/1010:45 am
KEF
-
DEN
Nonstop7h 55m
Icelandair
Deal found 2/23$556
This CrystalTravel deal was found by Cheapflights users on 2/23. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/94:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Sat 10/174:50 pm
KEF
-
DEN
Nonstop8h 10m
Icelandair
Deal found 2/23$561
This CrystalTravel deal was found by Cheapflights users on 2/23. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Sat 9/1210:45 am
KEF
-
DEN
Nonstop7h 55m
Icelandair
Deal found 2/23$564
This CrystalTravel deal was found by Cheapflights users on 2/23. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:10 pm
DEN
-
KEF
Nonstop7h 15m
Icelandair
Fri 6/510:45 am
KEF
-
DEN
Nonstop7h 55m
Icelandair
Deal found 2/23$566
This CrystalTravel deal was found by Cheapflights users on 2/23. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:10 pm
DEN
-
KEF
Nonstop7h 15m
Icelandair
Sat 8/294:50 pm
KEF
-
DEN
Nonstop8h 10m
Icelandair
Deal found 2/23$570
This FlightHub deal was found by Cheapflights users on 2/25. 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.
Mon 4/204:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Wed 4/294:50 pm
KEF
-
DEN
Nonstop8h 10m
Icelandair
Deal found 2/25$571
This Cheapflightsfares deal was found by Cheapflights users on 2/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/194:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Tue 10/274:55 pm
KEF
-
DEN
Nonstop8h 10m
Icelandair
Deal found 2/24$573
This Gotogate deal was found by Cheapflights users on 2/23. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/204:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Fri 4/244:50 pm
KEF
-
DEN
Nonstop8h 10m
Icelandair
Deal found 2/23$578
This CrystalTravel deal was found by Cheapflights users on 2/23. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/104:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Sun 5/174:50 pm
KEF
-
DEN
Nonstop8h 10m
Icelandair
Deal found 2/23$579
This Booking.com deal was found by Cheapflights users on 2/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/274:40 pm
DEN
-
KEF
Nonstop7h 20m
Icelandair
Sat 10/34:50 pm
KEF
-
DEN
Nonstop8h 10m
Icelandair
Deal found 2/26$580

Find flight deals from Denver to Keflavik Intl

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Keflavik Intl (KEF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$532
(CrystalTravel)

One-way from

$374
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$587

Good round-trip deal

$494 or less

Good one-way deal

$362 or less
Provider with most accurate pricing for Denver Intl-Reykjavik Keflavik Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Reykjavik Keflavik Intl flights.
Search Deals
From Denver Intl to Reykjavik Keflavik Intl
Search Deals
One-way flight from Denver Intl to Reykjavik Keflavik Intl
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Denver Intl to Reykjavik Keflavik Intl.
Search Deals
Price to beat on a one-way flight from Denver Intl to Reykjavik Keflavik Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver 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 February 27, 2026.
Use the filters below to find and compare flights from Denver to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Tue 4/28

12:44 pm-9:30 am

1 stop14h 46m

Reykjavik Keflavik Intl

Mon 5/4

11:25 am-7:42 pm

1 stop14h 17m

$604

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 4/25

1:46 pm-9:30 am

1 stop13h 44m

Reykjavik Keflavik Intl

Mon 5/4

11:25 am-10:48 pm

1 stop17h 23m

$604

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 4/25

1:46 pm-9:30 am

1 stop13h 44m

Reykjavik Keflavik Intl

Wed 5/6

11:25 am-10:48 pm

1 stop17h 23m

$604

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Tue 4/21

12:30 pm-9:30 am

2 stops15h 00m

Reykjavik Keflavik Intl

Wed 4/29

11:25 am-12:36 am

2 stops19h 11m

$614

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 8/19

11:25 am-7:55 am

1 stop14h 30m

Reykjavik Keflavik Intl

Mon 8/31

9:15 am-7:00 pm

1 stop15h 45m

$647

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Mon 5/18

4:10 pm-7:40 am

1 stop9h 30m

Reykjavik Keflavik Intl

Tue 5/26

9:30 am-3:36 pm

1 stop12h 06m

$664

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 5/16

1:15 pm-9:30 am

1 stop14h 15m

Reykjavik Keflavik Intl

Mon 5/25

9:30 am-8:15 pm

1 stop16h 45m

$684

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Tue 6/2

7:21 pm-9:00 am

1 stop31h 39m

Reykjavik Keflavik Intl

Tue 6/9

12:45 pm-11:59 pm

1 stop17h 14m

$701

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 3/25

12:33 pm-9:15 am

2 stops38h 42m

Reykjavik Keflavik Intl

Wed 4/1

5:15 pm-10:37 pm

2 stops35h 22m

$714

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sun 8/2

8:10 pm-9:25 am

Nonstop7h 15m

Reykjavik Keflavik Intl

Mon 8/10

10:45 am-12:40 pm

Nonstop7h 55m

$809

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/24

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Denver to Keflavik Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Keflavik Intl in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Reykjavik Keflavik Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Reykjavik Keflavik Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Reykjavik Keflavik Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Reykjavik Keflavik Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Denver to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from Denver 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 Denver to Reykjavik Keflavik Intl Airport

How far ahead should I book a flight from Denver to Reykjavik Keflavik Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Keflavik Intl. Price data was last updated on February 20, 2026.

To ensure you get the cheapest price possible for a flight from Denver to Reykjavik Keflavik Intl Airport, you should look to book at least 20 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, November is the cheapest month in which you can book a flight from Denver to Reykjavik Keflavik Intl Airport (average of $370). Flying from Denver to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $557). 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.

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

Find hourly flight availability from Denver 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 February 27, 2026.

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

Reviews of airlines servicing Keflavik Intl

Get insights into the airlines that provide service to Keflavik Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Keflavik Intl. Reviews last updated February 27, 2026.
Peruse reviews from past customers who have flown with Icelandair from Denver to Reykjavik Keflavik Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Icelandair
7.1
Good
617 reviews

Boarding

7.2

Food

6.2

Entertainment

7.0

Comfort

7.0

Crew

8.1

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
Icelandair
7.1
Good
617 reviews
Icelandair
7.1
Good
617 reviews

Boarding

7.2

Food

6.2

Entertainment

7.0

Comfort

7.0

Crew

8.1

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.

Related info for your journey

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

  • What airport do you fly from for flights from Denver to Reykjavik Keflavik Intl?

    Denver Intl (DEN), located 18.5 mi from the city center, is the airport you fly out of when you book flights from Denver to Reykjavik Keflavik Intl. 1 airline have flights from Denver Intl to Reykjavik Keflavik Intl on a regular basis. Booking flights from Denver Intl to Reykjavik Keflavik Intl should not be difficult; the airport handles an average of 0 outbound flights to Reykjavik Keflavik Intl per day.

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

    A quick flight from Denver to Reykjavik Keflavik Intl Airport can take about 13h 44m. Delta provides one of the quickest options available for as low as $604. The distance from Denver to Reykjavik Keflavik Intl Airport is about 3556 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Denver to Reykjavik Keflavik Intl Airport round-trip?

    Currently priced at $414, Icelandair will fly you from Denver to Reykjavik Keflavik Intl Airport and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Icelandair is priced at 31% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from Denver to Reykjavik Keflavik Intl Airport?

    On average you can expect to pay $1,381 for a flight from Denver to Reykjavik Keflavik Intl Airport. The cheapest flight overall is $245 while the most popular route, (Denver Intl - Reykjavik Keflavik Intl) is currently priced at $532.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver 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 Denver to Reykjavik Keflavik Intl Airport?

    Currently, November is the cheapest month in which you can book a flight from Denver to Reykjavik Keflavik Intl Airport (average of $370). Flying from Denver to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $557). 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

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Alternative routes for Denver to Keflavik Intl

See prices for flight routes from nearby airports that may be better suited for you.
Colorado Springs to Keflavik Intl flights

Top airline flying from Denver to Keflavik Intl

Discover the top airline that operate flights from Denver 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 February 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$414Average$611FlexibilityNo cancel feeOn-time76%

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