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Keflavik Intl

$289+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KEF
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
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 July 24, 2026.

This Ticket deal was found by Cheapflights users on 7/22. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2611:25 am
DEN
-
KEF
1 stop14h 30m
Air Canada
Tue 8/49:15 am
KEF
-
DEN
1 stop15h 40m
Air Canada
Deal found 7/22$366
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Tue 10/611:25 am
DEN
-
KEF
1 stop14h 30m
United Airlines
Fri 10/169:15 am
KEF
-
DEN
2 stops39h 10m
United Airlines
Deal found 7/20$410
This United Airlines deal was found by Cheapflights users on 7/21. 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.
Fri 9/186:00 am
DEN
-
KEF
1 stop19h 00m
United Airlines
Fri 10/29:15 am
KEF
-
DEN
2 stops39h 10m
United Airlines
Deal found 7/21$411
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Tue 9/155:30 am
DEN
-
KEF
1 stop21h 20m
United Airlines
Fri 10/29:15 am
KEF
-
DEN
1 stop31h 16m
United Airlines
Deal found 7/20$412
This United Airlines deal was found by Cheapflights users on 7/21. 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.
Fri 10/168:29 pm
DEN
-
KEF
2 stops29h 26m
United Airlines
Fri 10/239:15 am
KEF
-
DEN
2 stops39h 10m
United Airlines
Deal found 7/21$414
This United Airlines deal was found by Cheapflights users on 7/21. 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.
Mon 10/1211:35 am
DEN
-
KEF
1 stop15h 10m
United Airlines
Fri 10/169:15 am
KEF
-
DEN
2 stops39h 10m
United Airlines
Deal found 7/21$415
This United Airlines deal was found by Cheapflights users on 7/22. 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 10/46:00 am
DEN
-
KEF
1 stop20h 50m
United Airlines
Fri 10/99:15 am
KEF
-
DEN
2 stops37h 38m
United Airlines
Deal found 7/22$416
This United Airlines deal was found by Cheapflights users on 7/21. 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.
Fri 9/257:10 pm
DEN
-
KEF
2 stops30h 45m
United Airlines
Fri 10/29:15 am
KEF
-
DEN
2 stops39h 10m
United Airlines
Deal found 7/21$419

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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$410
(United Airlines)

One-way from

$289
(Trip.com)

Popular in

March

Cheapest in

January

Average price

$634

Good round-trip deal

$661 or less

Good one-way deal

$297 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.
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. 2% potential increase in price ($19 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 July 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 July 24, 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

Wed 8/12

8:29 pm-8:50 am

1 stop30h 21m

Reykjavik Keflavik Intl

Fri 8/21

9:15 am-10:33 am

1 stop31h 18m

$425

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

$430
Quickest round-trip

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Fri 11/6

4:15 pm-10:00 am

1 stop10h 45m

Reykjavik Keflavik Intl

Mon 11/9

12:00 pm-10:22 pm

1 stop17h 22m

$431

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Thu 9/10

11:59 pm-7:00 am

1 stop25h 01m

Reykjavik Keflavik Intl

Tue 9/15

10:00 am-10:22 am

1 stop30h 22m

$435

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Tue 12/1

11:40 pm-10:00 am

2 stops27h 20m

Reykjavik Keflavik Intl

Mon 12/21

12:00 pm-12:38 am

2 stops19h 38m

$436

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Thu 11/5

8:34 pm-10:00 am

1 stop30h 26m

Reykjavik Keflavik Intl

Thu 11/12

12:00 pm-11:30 pm

1 stop18h 30m

$437

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Fri 8/28

9:40 am-7:55 am

1 stop16h 15m

Reykjavik Keflavik Intl

Sun 8/30

11:30 am-9:16 pm

1 stop15h 46m

$443

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Fri 8/28

9:40 am-7:55 am

1 stop16h 15m

Reykjavik Keflavik Intl

Sun 9/6

11:30 am-11:53 pm

2 stops18h 23m

$448

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Fri 10/9

12:00 pm-6:15 am

1 stop12h 15m

Reykjavik Keflavik Intl

Mon 10/12

4:50 pm-11:02 am

1 stop24h 12m

$574
Cheapest one-way

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 8/22

7:16 pm-7:55 am

2 stops30h 39m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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 July.
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 March is currently the most expensive (average of $703). 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 July 24, 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 $603 and $858 in October.
The cheapest round-trip price found within the last 5 days was $410 on United Airlines (Oct 6-Oct 16).

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 July 24, 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
7.0
Good
716 reviews

Entertainment

6.9

Comfort

6.9

Boarding

7.2

Overall

7.0

Food

6.1

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
7.0
Good
716 reviews
Icelandair
7.0
Good
716 reviews

Entertainment

6.9

Comfort

6.9

Boarding

7.2

Overall

7.0

Food

6.1

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 26h 31m. United Airlines provides one of the quickest options available for as low as $430. 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 $434, 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 30% 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 $1,579 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 $415.

  • 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 March is currently the most expensive (average of $703). 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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$434Average$625FlexibilityNo cancel feeOn-time76%

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