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Keflavik Intl

$327+ 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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KEF
Sep 3 — Sep 101
Thu 9/3
Thu 9/10
1 adult, Economy
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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 August 4, 2026.

This Flightnetwork deal was found by Cheapflights users on 8/3. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:50 pm -
2 stops30h 05m
Wed 10/79:15 am -
2 stops19h 53m
Deal found 8/3$384
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 10/159:40 am -
1 stop16h 15m
Fri 10/239:15 am -
2 stops33h 06m
Deal found 7/30$410
This United Airlines deal was found by Cheapflights users on 8/3. 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.
Sun 10/116:00 am -
1 stop20h 50m
Fri 10/239:15 am -
2 stops36h 22m
Deal found 8/3$411
This United deal was found by Cheapflights users on 7/30. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:10 pm -
1 stop32h 40m
Fri 10/169:15 am -
2 stops37h 43m
Deal found 7/30$412

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 August 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$384
(Flightnetwork)

One-way from

$327
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$653

Good round-trip deal

$635 or less

Good one-way deal

$293 or less
Provider with most accurate pricing for Denver Intl-Reykjavik Keflavik Intl flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Reykjavik Keflavik Intl flights.
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From Denver Intl to Reykjavik Keflavik Intl
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One-way flight from Denver Intl to Reykjavik Keflavik Intl
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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in August 2026
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Price to beat on a round-trip flight from Denver Intl to Reykjavik Keflavik Intl.
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Price to beat on a one-way flight from Denver Intl to Reykjavik Keflavik Intl.
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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 August 4, 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

Cheapest round-trip

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 10/10

6:10 pm-8:50 am

1 stop32h 40m

Reykjavik Keflavik Intl

Fri 10/16

9:15 am-4:58 pm

2 stops37h 43m

$412

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sun 10/4

6:00 am-8:45 am

2 stops20h 45m

Reykjavik Keflavik Intl

Fri 10/9

9:15 am-6:25 pm

2 stops39h 10m

$420

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sun 8/16

11:59 pm-8:30 am

1 stop26h 31m

Reykjavik Keflavik Intl

Mon 8/24

9:15 am-10:33 am

1 stop31h 18m

$425

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 8/15

8:29 pm-8:50 am

1 stop30h 21m

Reykjavik Keflavik Intl

Fri 8/28

9:15 am-10:33 am

1 stop31h 18m

$426

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 8/26

11:59 pm-8:30 am

1 stop26h 31m

Reykjavik Keflavik Intl

Fri 9/4

9:15 am-10:33 am

1 stop31h 18m

$426

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Fri 8/14

6:18 pm-8:50 am

1 stop32h 32m

Reykjavik Keflavik Intl

Wed 8/26

9:50 am-10:35 am

1 stop30h 45m

$430

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Fri 8/21

7:05 pm-8:30 am

1 stop31h 25m

Reykjavik Keflavik Intl

Wed 8/26

9:50 am-10:35 am

1 stop30h 45m

$430

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 9/23

5:30 am-8:50 am

1 stop21h 20m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-10:22 am

2 stops31h 07m

$433
Quickest round-trip

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 10/24

5:45 pm-10:00 am

2 stops34h 15m

Reykjavik Keflavik Intl

Thu 10/29

12:00 pm-9:48 pm

1 stop15h 48m

$436
Cheapest one-way

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 8/29

11:21 am-7:55 am

2 stops38h 34m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 19 resultsSorted by cheapest first
1
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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 August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 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?

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 3 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, January is the cheapest month in which you can book a flight from Denver to Reykjavik Keflavik Intl Airport (average of $520). Flying from Denver to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $730). 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 August 4, 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.

How much does it cost to fly round-trip from Denver to Reykjavik Keflavik Intl Airport?

Airfare is below average for this route at the moment.

Denver to Reykjavik Keflavik Intl Airport flights typically cost between $605 and $973 in September.
The cheapest round-trip price found within the last 5 days was $384 on Air Canada (Sep 28-Oct 7).

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 August 4, 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
6.9
Okay
720 reviews

Overall

6.9

Food

6.1

Boarding

7.1

Entertainment

6.8

Comfort

6.9

Crew

8.0

Reviews

1 / 20
6.0
Good

William,Jun 2026

SEA - KEF

First time Iceland Air. Ridiculously small amount of leg room, flight was hotter than hades and people kept requesting for cooler air that never came. You pay for everything, no food of any kind unless you pay which I've never seen on a flight of this length. Just seemed like they are cheap as possible about everything. Won't fly with them again if I can avoid it.
Icelandair
6.9
Okay
720 reviews
Icelandair
6.9
Okay
720 reviews

Overall

6.9

Food

6.1

Boarding

7.1

Entertainment

6.8

Comfort

6.9

Crew

8.0

Reviews

1 / 20
6.0
Good

William,Jun 2026

SEA - KEF

First time Iceland Air. Ridiculously small amount of leg room, flight was hotter than hades and people kept requesting for cooler air that never came. You pay for everything, no food of any kind unless you pay which I've never seen on a flight of this length. Just seemed like they are cheap as possible about everything. Won't fly with them again if I can avoid it.

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 2 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 20h 45m. United Airlines provides one of the quickest options available for as low as $420. 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 $433, 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 $1,619 for a flight from Denver to Reykjavik Keflavik Intl Airport. The cheapest flight overall is $198 while the most popular route, (Denver Intl - Reykjavik Keflavik Intl) is currently priced at $410.

  • 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, January is the cheapest month in which you can book a flight from Denver to Reykjavik Keflavik Intl Airport (average of $520). Flying from Denver to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $730). 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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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 August 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$433Average$625FlexibilityNo cancel feeOn-time76%

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