HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Keflavik Intl

$271+ Cheap flights from Colorado 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KEF
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado 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 Colorado to Keflavik Intl

Keep the following information in mind while searching for Colorado to Keflavik Intl flight deals. Data was last updated November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$470
(oojo)

One-way from

$271
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$590

Good round-trip deal

$476 or less

Good one-way deal

$414 or less
Provider with most accurate pricing for Denver Intl-Reykjavik (REK) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Reykjavik (REK) flights.
Search Deals
From Colorado to Reykjavik Keflavik Intl
Search Deals
One-way flight from Colorado to Reykjavik Keflavik Intl
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Colorado to Reykjavik Keflavik Intl.
Search Deals
Price to beat on a one-way flight from Colorado to Reykjavik Keflavik Intl.
Search Deals

Find flight deals from Colorado to Keflavik Intl

Cheapest flights from Colorado to Keflavik Intl
Explore the most affordable flight options available from Colorado to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2025.

This CrystalTravel deal was found by Cheapflights users on 11/1. 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 11/103:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Wed 11/194:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 11/1$444
This oojo deal was found by Cheapflights users on 11/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/73:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Thu 12/114:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 11/1$471
This oojo deal was found by Cheapflights users on 11/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/43:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Mon 12/84:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 11/1$540
This CrystalTravel deal was found by Cheapflights users on 11/1. 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.
Thu 12/113:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Tue 12/164:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 11/1$549
This deal was found by Cheapflights users on 11/3. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/113:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Mon 12/154:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 11/3$558
This Gotogate deal was found by Cheapflights users on 11/1. 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 12/83:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Mon 12/154:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 11/1$559
This oojo deal was found by Cheapflights users on 11/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Sat 11/224:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 11/2$580
This Expedia deal was found by Cheapflights users on 11/1. 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.
Mon 12/13:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Mon 12/84:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 11/1$594
This Lufthansa deal was found by Cheapflights users on 11/2. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/51:39 pmDRO - KEF
2 stops17h 36mLufthansa
Tue 12/93:20 pmKEF - DRO
2 stops36h 14mLufthansa
Deal found 11/2$670
This American Airlines deal was found by Cheapflights users on 11/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:29 pmDRO - KEF
2 stops59h 16mMultiple Airlines
Mon 12/1511:50 amKEF - DRO
2 stops35h 09mMultiple Airlines
Deal found 11/3$1,030
This American Airlines deal was found by Cheapflights users on 11/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:59 pmCOS - KEF
2 stops34h 51mAmerican Airlines
Mon 12/1511:50 amKEF - COS
2 stops34h 55mAmerican Airlines
Deal found 11/3$1,047
This American Airlines deal was found by Cheapflights users on 11/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:29 pmDRO - KEF
2 stops35h 21mAmerican Airlines
Mon 12/1511:50 amKEF - DRO
2 stops28h 55mAmerican Airlines
Deal found 11/3$1,080

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado 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 November 3, 2025.
Use the filters below to find and compare flights from Colorado to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Colorado

Fly to

Keflavik Intl

Route

Depart

Return

Price

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 2/4

3:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Sun 2/8

4:55 pm-6:05 pm

Nonstop8h 10m

$543

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 4/8

12:54 pm-7:50 am

2 stops36h 56m

Reykjavik Keflavik Intl

Wed 4/22

8:35 am-10:19 pm

2 stops19h 44m

$606

DurangoReykjavik

DRO - KEF

DROKEF

Durango La Plata County

Fri 12/5

1:39 pm-2:15 pm

2 stops17h 36m

Reykjavik Keflavik Intl

Tue 12/9

3:20 pm-8:34 pm

2 stops36h 14m

$670

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 1/17

12:48 pm-2:20 pm

2 stops18h 32m

Reykjavik Keflavik Intl

Sat 1/24

2:20 pm-7:28 pm

2 stops36h 08m

$672

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Thu 12/4

12:18 pm-9:15 am

2 stops37h 57m

Reykjavik Keflavik Intl

Mon 12/8

10:00 am-5:46 pm

2 stops38h 46m

$705

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sun 3/29

12:55 pm-7:50 am

2 stops36h 55m

Reykjavik Keflavik Intl

Sat 5/9

8:35 am-10:19 pm

2 stops19h 44m

$707

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 2/25

12:33 pm-9:15 am

2 stops37h 42m

Reykjavik Keflavik Intl

Wed 3/4

10:00 am-3:30 pm

2 stops36h 30m

$713

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 4/1

8:34 pm-11:30 pm

2 stops44h 56m

Reykjavik Keflavik Intl

Thu 4/9

2:20 pm-3:35 pm

1 stop31h 15m

$752

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Tue 4/21

6:30 am-9:40 am

3 stops21h 10m

Reykjavik Keflavik Intl

Sat 4/25

7:40 am-10:58 pm

2 stops21h 18m

$763

DurangoReykjavik

DRO - KEF

DROKEF

Durango La Plata County

Mon 12/8

4:29 pm-10:45 am

2 stops59h 16m

Reykjavik Keflavik Intl

Mon 12/15

11:50 am-3:59 pm

2 stops35h 09m

$1,030

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 23 results
1
2
3

Best time to book a flight from Colorado to Keflavik Intl

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

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

Currently, November is the cheapest month in which you can book a flight from Colorado to Reykjavik Keflavik Intl Airport (average of $384). Flying from Colorado to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $564). 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 CO to KEF?

Find hourly flight availability from Colorado 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 November 3, 2025.

When flying from Colorado to Reykjavik Keflavik Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 33% versus a flight at noon.

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

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

Travelers seeking maximum savings on their Colorado 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.

Weekly flight availability from Colorado to Reykjavik Keflavik Intl Airport

Explore weekly flight availability from Colorado to Keflavik Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 3, 2025.

The most flights from USCO to KEF are scheduled on a Monday (2 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

Related info for your journey

Find useful and relevant information for your journey from Colorado 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 Colorado to Reykjavik Keflavik Intl Airport?

    A quick flight from Colorado to Reykjavik Keflavik Intl Airport can take about 7h 25m. Icelandair provides one of the quickest options available for as low as $543. Airlines will cover a distance of 3556 mi. This flight may include one or multiple stops.

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

    While some choose either Durango La Plata County - Reykjavik Keflavik Intl or Colorado Springs - Reykjavik Keflavik Intl, Denver Intl - Reykjavik Keflavik Intl is the most popular route from Colorado to Reykjavik Keflavik Intl Airport.

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

    Looking for the cheapest flight from Colorado to Reykjavik Keflavik Intl Airport? While on average our users pay $1,207, our data indicates the cheapest price to be $324. The most popular route (Denver Intl - Reykjavik Keflavik Intl), is priced around $442.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Colorado to Reykjavik Keflavik Intl Airport (average of $384). Flying from Colorado to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $564). 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 Colorado to Keflavik Intl

Discover the top airline that operate flights from Colorado 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$442Average$628FlexibilityNo 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.