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Keflavik Intl

$269+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KEF
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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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 July 31, 2025.

Round-trip from

$513
(Kiwi.com)

One-way from

$269
(Trip.com)

Popular in

July

Cheapest in

October

Average price

$668

Good round-trip deal

$459 or less

Good one-way deal

$224 or less
From Colorado to Reykjavik Keflavik Intl
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One-way flight from Colorado to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 3% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Colorado to Reykjavik Keflavik Intl.
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Price to beat on a one-way flight from Colorado to Reykjavik Keflavik Intl.
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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 July 31, 2025.

This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/63:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Thu 11/204:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 7/29$463
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Sat 8/236:45 amDEN - KEF
1 stop16h 10mMultiple Airlines
Fri 8/293:05 pmKEF - DEN
1 stop35h 00mMultiple Airlines
Deal found 7/29$499
This lol.travel 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1311:18 amDEN - KEF
2 stops13h 42mUnited Airlines
Sat 9/2011:00 amKEF - DEN
2 stops16h 59mUnited Airlines
Deal found 7/30$562
This Expedia deal was found by Cheapflights users on 7/29. 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.
Tue 8/191:55 pmCOS - KEF
2 stops36h 15mAir Canada
Tue 8/269:50 amKEF - COS
2 stops33h 24mAir Canada
Deal found 7/29$574
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.
Tue 9/97:05 amDRO - KEF
2 stops19h 05mUnited Airlines
Tue 9/169:50 amKEF - DRO
2 stops40h 46mUnited Airlines
Deal found 7/30$665
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/1912:02 pmCOS - KEF
1 stop14h 28mUnited Airlines
Tue 8/269:50 amKEF - COS
2 stops16h 49mUnited Airlines
Deal found 7/29$783
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/196:00 amCOS - KEF
2 stops20h 10mMultiple Airlines
Tue 8/269:50 amKEF - COS
3 stops18h 04mMultiple Airlines
Deal found 7/29$812
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/21:36 pmDRO - KEF
2 stops27h 59mLufthansa
Sat 10/41:15 amKEF - DRO
2 stops25h 18mLufthansa
Deal found 7/30$918

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 July 31, 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

Sat 8/23

8:10 pm-9:25 am

Nonstop7h 15m

Reykjavik Keflavik Intl

Mon 9/1

10:35 am-12:30 pm

Nonstop7h 55m

$468

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 8/23

6:45 am-4:55 am

1 stop16h 10m

Reykjavik Keflavik Intl

Fri 8/29

3:05 pm-8:05 pm

1 stop35h 00m

$499

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 9/13

11:18 am-7:00 am

2 stops13h 42m

Reykjavik Keflavik Intl

Sat 9/20

11:00 am-9:59 pm

2 stops16h 59m

$562

Colorado SpringsReykjavik

COS - KEF

COSKEF

Colorado Springs

Tue 8/19

1:55 pm-8:10 am

2 stops36h 15m

Reykjavik Keflavik Intl

Tue 8/26

9:50 am-1:14 pm

2 stops33h 24m

$574

DurangoReykjavik

DRO - KEF

DROKEF

Durango La Plata County

Tue 9/9

7:05 am-8:10 am

2 stops19h 05m

Reykjavik Keflavik Intl

Tue 9/16

9:50 am-8:36 pm

2 stops40h 46m

$665

Colorado SpringsReykjavik

COS - KEF

COSKEF

Colorado Springs

Tue 8/19

12:02 pm-8:30 am

1 stop14h 28m

Reykjavik Keflavik Intl

Tue 8/26

9:50 am-8:39 pm

2 stops16h 49m

$783

Colorado SpringsReykjavik

COS - KEF

COSKEF

Colorado Springs

Tue 8/19

6:00 am-8:10 am

2 stops20h 10m

Reykjavik Keflavik Intl

Tue 8/26

9:50 am-9:54 pm

3 stops18h 04m

$812

DurangoReykjavik

DRO - KEF

DROKEF

Durango La Plata County

Thu 10/2

1:36 pm-11:35 pm

2 stops27h 59m

Reykjavik Keflavik Intl

Sat 10/4

1:15 am-8:33 pm

2 stops25h 18m

$918

Colorado SpringsReykjavik

COS - KEF

COSKEF

Colorado Springs

Wed 8/27

1:55 pm-1:05 pm

2 stops17h 10m

Reykjavik Keflavik Intl

Sat 8/30

12:25 am-6:48 pm

2 stops24h 23m

$1,627

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sun 8/31

12:19 am-4:45 am

2 stops22h 26m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 19 results
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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 $328). Flying from Colorado to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $653). 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 July 31, 2025.

When flying from Colorado to Reykjavik Keflavik Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 July 31, 2025.

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

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 31, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and KLM from Colorado to Reykjavik Keflavik Intl Airport to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
KLM
7.8
Good
1,383 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
WestJet
7.2
Good
2,978 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

  • What are the cheapest airlines to fly from Colorado to Reykjavik Keflavik Intl Airport one-way?

    The cheapest airlines for a one-way flight from Colorado to Reykjavik Keflavik Intl Airport are WestJet ($293), Icelandair ($387), and United Airlines ($429).

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

    While some choose either Colorado Springs - Reykjavik Keflavik Intl or Durango La Plata County - 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 $1,244, our data indicates the cheapest price to be $169. The most popular route (Denver Intl - Reykjavik Keflavik Intl), is priced around $431.

  • 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 $328). Flying from Colorado to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $653). 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 2 airlines flying from Colorado to Keflavik Intl

Discover the top 2 airlines 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$509Average$639FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$523Average$922FlexibilityNo cancel feeOn-time69%

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