HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Keflavik Intl

$339+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KEF
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver 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.

Cheapflights Tip: The best prices from Denver Intl to Reykjavik Keflavik Intl are usually found in October or November, 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 December 12, 2025.

This CrystalTravel deal was found by Cheapflights users on 12/10. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/303:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Tue 1/134:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 12/10$611
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/153:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Sat 12/274:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 12/9$629
This FlightHub deal was found by Cheapflights users on 12/10. 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.
Tue 12/305:35 pmDEN - KEF
2 stops60h 45mMultiple Airlines
Tue 1/133:20 pmKEF - DEN
2 stops35h 35mMultiple Airlines
Deal found 12/10$639
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/163:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Fri 12/264:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 12/9$701
This FlightHub deal was found by Cheapflights users on 12/10. 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.
Wed 12/104:20 pmDEN - KEF
1 stop14h 55mMultiple Airlines
Sat 12/132:20 pmKEF - DEN
2 stops38h 36mMultiple Airlines
Deal found 12/10$759
This FlightHub deal was found by Cheapflights users on 12/10. 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.
Tue 12/308:20 pmDEN - KEF
1 stop34h 55mLufthansa
Tue 1/133:20 pmKEF - DEN
1 stop29h 20mLufthansa
Deal found 12/10$762
This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/103:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Sun 12/149:55 amKEF - DEN
1 stop20h 04mIcelandair
Deal found 12/10$771
This Ovago deal was found by Cheapflights users on 12/10. 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.
Wed 12/104:20 pmDEN - KEF
1 stop14h 55mLufthansa
Sun 12/143:20 pmKEF - DEN
1 stop31h 40mLufthansa
Deal found 12/10$785
This FlightHub deal was found by Cheapflights users on 12/10. 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.
Wed 12/104:20 pmDEN - KEF
1 stop14h 55mLufthansa
Sat 12/133:10 pmKEF - DEN
1 stop34h 45mLufthansa
Deal found 12/10$871
This FlightHub deal was found by Cheapflights users on 12/10. 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.
Wed 12/103:40 pmDEN - KEF
Nonstop7h 25mMultiple Airlines
Fri 12/199:55 amKEF - DEN
1 stop13h 57mMultiple Airlines
Deal found 12/10$874

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$512
(CrystalTravel)

One-way from

$339
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,005

Good round-trip deal

$450 or less

Good one-way deal

$396 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. 11% potential increase in price ($84 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 2025.
Use the filters below to find and compare flights from Denver to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Denver

Fly to

Keflavik Intl

Route

Depart

Return

Price

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Thu 2/26

3:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Mon 3/2

5:00 pm-1:52 pm

1 stop27h 52m

$738

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 1/10

11:35 am-6:05 am

2 stops35h 30m

Reykjavik Keflavik Intl

Sat 1/24

5:00 pm-12:45 pm

1 stop26h 45m

$738

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Fri 2/6

5:09 pm-6:15 am

1 stop30h 06m

Reykjavik Keflavik Intl

Tue 2/10

5:00 pm-11:35 pm

1 stop13h 35m

$798

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 2/25

6:16 pm-6:15 am

1 stop28h 59m

Reykjavik Keflavik Intl

Sat 2/28

5:00 pm-11:59 pm

1 stop13h 59m

$798

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sun 1/11

7:00 am-6:15 am

1 stop16h 15m

Reykjavik Keflavik Intl

Sun 1/18

5:00 pm-12:38 pm

1 stop26h 38m

$809

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sun 2/1

7:00 am-6:15 am

1 stop16h 15m

Reykjavik Keflavik Intl

Sat 2/14

5:00 pm-6:56 pm

1 stop32h 56m

$824

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 2/21

7:00 am-6:15 am

1 stop16h 15m

Reykjavik Keflavik Intl

Fri 2/27

5:00 pm-11:59 pm

1 stop13h 59m

$828

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Mon 2/23

7:00 am-6:15 am

1 stop16h 15m

Reykjavik Keflavik Intl

Fri 3/6

5:00 pm-6:56 pm

1 stop32h 56m

$838

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 1/10

6:41 am-4:50 pm

2 stops27h 09m

Reykjavik Keflavik Intl

Sat 1/24

11:25 am-10:46 pm

2 stops42h 21m

$841

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 2/21

7:52 pm-6:15 am

1 stop27h 23m

Reykjavik Keflavik Intl

Sun 3/1

5:00 pm-11:59 pm

1 stop13h 59m

$854

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 22 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 5, 2025.

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 $372). Flying from Denver to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $576). 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 December 12, 2025.

One of the essential ways to save on airfare from Denver to Reykjavik Keflavik Intl Airport is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 21% on airfare.

What is the cheapest day to fly from Denver to Reykjavik Keflavik Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Denver to Keflavik Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Denver to Reykjavik Keflavik Intl Airport flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 12, 2025.
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
7.0
Good
589 reviews

Comfort

6.9

Boarding

7.2

Food

6.2

Crew

8.0

Entertainment

7.0

Overall

7.0

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
7.0
Good
589 reviews
Icelandair
7.0
Good
589 reviews

Comfort

6.9

Boarding

7.2

Food

6.2

Crew

8.0

Entertainment

7.0

Overall

7.0

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 30h 06m. Alaska Airlines provides one of the quickest options available for as low as $798. The distance from Denver to Reykjavik Keflavik Intl Airport is about 3556 mi.

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

    Currently priced at $425, 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 34% 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 $1,415 for a flight from Denver to Reykjavik Keflavik Intl Airport. The cheapest flight overall is $324 while the most popular route, (Denver Intl - Reykjavik Keflavik Intl) is currently priced at $512.

  • 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 $372). Flying from Denver to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $576). 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.

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
Durango 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$425Average$625FlexibilityNo 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.