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$291+ Cheap flights from Keflavik Intl (KEF) to Denver (DEN)

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — DEN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Keflavik Intl to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Keflavik Intl (KEF) to Denver (DEN). 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 September 17, 2025.

Round-trip from

$505
(Kiwi.com)

One-way from

$291
(oojo)

Popular in

September

Cheapest in

November

Average price

$1,267

Good one-way deal

$477 or less
From Reykjavik Keflavik Intl to Denver Intl
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One-way flight from Reykjavik Keflavik Intl to Denver Intl
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Highest demand for flights based on searches. 31% potential increase in price ($352 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($57 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a one-way flight from Reykjavik Keflavik Intl to Denver Intl.
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Find flight deals from Keflavik Intl to Denver

Cheapest flights from Keflavik Intl to Denver
Explore the most affordable flight options available from Keflavik Intl to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Thu 10/163:05 pmKEF - DEN
1 stop35h 17mMultiple Airlines
Wed 10/2212:59 amDEN - KEF
2 stops21h 56mMultiple Airlines
Deal found 9/16$505
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/113:05 pmKEF - DEN
2 stops23h 10mMultiple Airlines
Sun 10/1212:15 pmDEN - KEF
1 stop14h 00mMultiple Airlines
Deal found 9/16$552
This Gotogate deal was found by Cheapflights users on 9/16. 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.
Fri 11/74:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Fri 11/143:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Deal found 9/16$610
This lastminute.com deal was found by Cheapflights users on 9/15. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/64:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Fri 11/143:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Deal found 9/15$615
This Booking.com deal was found by Cheapflights users on 9/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/144:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Sat 12/203:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Deal found 9/17$617
This Gotogate deal was found by Cheapflights users on 9/16. 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.
Fri 12/124:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Wed 12/173:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Deal found 9/16$619
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Thu 11/63:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Deal found 9/14$641
This ResecentrumGruppen deal was found by Cheapflights users on 9/16. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/314:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Fri 11/73:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Deal found 9/16$646

Cheapflights Fare Finder

 
Customize your flight search to find flights from Keflavik Intl to Denver 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 September 17, 2025.
Use the filters below to find and compare flights from Reykjavik Keflavik Intl Airport to Denver that are best for you.

Fly from

Keflavik Intl

Fly to

Denver

Route

Depart

Return

Price

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Sat 10/11

3:05 pm-8:15 am

2 stops23h 10m

Denver Intl

Sun 10/12

12:15 pm-8:15 am

1 stop14h 00m

$552

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Fri 11/7

4:55 pm-6:05 pm

Nonstop8h 10m

Denver Intl

Fri 11/14

3:40 pm-6:05 am

Nonstop7h 25m

$610

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Thu 11/6

4:55 pm-6:05 pm

Nonstop8h 10m

Denver Intl

Fri 11/14

3:40 pm-6:05 am

Nonstop7h 25m

$615

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Fri 10/31

4:55 pm-7:05 pm

Nonstop8h 10m

Denver Intl

Fri 11/7

3:40 pm-6:05 am

Nonstop7h 25m

$656

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Fri 12/12

5:00 pm-11:59 pm

1 stop13h 59m

Denver Intl

Wed 12/17

3:40 pm-6:05 am

Nonstop7h 25m

$750

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Thu 10/30

4:55 pm-7:05 pm

Nonstop8h 10m

Denver Intl

Thu 11/6

8:02 pm-6:15 am

1 stop27h 13m

$778

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Fri 10/31

4:55 pm-7:05 pm

Nonstop8h 10m

Denver Intl

Fri 11/7

6:05 pm-6:35 am

1 stop29h 30m

$791

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Sat 10/11

4:50 pm-6:55 pm

Nonstop8h 05m

Denver Intl

Sun 10/12

8:10 pm-9:25 am

Nonstop7h 15m

$808

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Thu 10/2

9:35 am-12:17 pm

2 stops32h 42m

$347

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Fri 9/26

3:05 pm-9:22 pm

2 stops36h 17m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 16 results
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Best time to book a flight from Keflavik Intl to Denver

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

What is the cheapest time of day to fly from KEF to DEN?

Find hourly flight availability from Keflavik Intl to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

One of the essential ways to save on airfare from Reykjavik Keflavik Intl Airport to Denver is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 11% on airfare.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated September 17, 2025.
Peruse reviews from past customers who have flown with Icelandair from Reykjavik Keflavik Intl Airport to Denver 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
545 reviews

Entertainment

7.0

Food

6.2

Overall

7.0

Comfort

6.9

Crew

8.0

Boarding

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

GVA - KEF

Terrible customer service when dealing with phone representatives. Baggage was lost.
Icelandair
7.0
Good
545 reviews
Icelandair
7.0
Good
545 reviews

Entertainment

7.0

Food

6.2

Overall

7.0

Comfort

6.9

Crew

8.0

Boarding

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

GVA - KEF

Terrible customer service when dealing with phone representatives. Baggage was lost.

Related info for your journey

Find useful and relevant information for your journey from Keflavik Intl to Denver. 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 into for flights to Denver from Reykjavik Keflavik Intl?

    For a flight from Reykjavik Keflavik Intl to Denver, you will be flying into Denver Intl. Denver Intl (DEN) is just 18.5 mi from the center of the city. Denver Intl is the only Denver airport and it handles 1 inbound flight from Reykjavik Keflavik Intl per day. 1 airline has flights to Denver Intl from Reykjavik Keflavik Intl on a regular basis.

  • How long is the flight from Reykjavik Keflavik Intl Airport to Denver?

    Departing from Reykjavik Keflavik Intl Airport to Denver will take you 8h 10m. Reykjavik Keflavik Intl Airport and Denver are separated by a distance of 3556 mi. Generally, flights for this route are nonstop.

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

    Cheapflights users have booked flights from Reykjavik Keflavik Intl Airport to Denver round-trip from $543. Icelandair is priced at 28% lower than the current average price of a flight leaving 3 months from now.

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

    Looking for the cheapest flight from Reykjavik Keflavik Intl Airport to Denver? While on average our users pay $559, our data indicates the cheapest price to be $466. The most popular route (Reykjavik Keflavik Intl - Denver Intl), is priced around $523.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to Denver (average of $197). Flying from Reykjavik Keflavik Intl Airport to Denver in March is currently the most expensive (average of $278). 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 Denver?

Book flights to Denver if you plan to visit one of these locations
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Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Keflavik Intl to Denver

Discover the top airline that operate flights from Keflavik Intl to Denver. 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$543Average$623FlexibilityNo cancel feeOn-time76%

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