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$281+ 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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — DEN
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$496
(Trip.com)

One-way from

$281
(Kiwi.com)

Popular in

March

Cheapest in

November

Average price

$565

Good round-trip deal

$2,294 or less

Good one-way deal

$473 or less
Provider with most accurate pricing for Reykjavik Keflavik Intl-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Reykjavik Keflavik Intl-Denver Intl flights.
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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. 9% potential increase in price ($72 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Reykjavik Keflavik Intl to Denver Intl.
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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 April 29, 2025.

This Trip.com deal was found by Cheapflights users on 4/29. 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.
Tue 6/109:35 amKEF - DEN
1 stop31h 52mWestJet
Tue 6/2412:15 pmDEN - KEF
1 stop14h 00mWestJet
Deal found 4/29$496
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/109:35 amKEF - DEN
2 stops15h 48mMultiple Airlines
Tue 6/2412:15 pmDEN - KEF
1 stop14h 00mMultiple Airlines
Deal found 4/29$633
This oojo deal was found by Cheapflights users on 4/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/3010:35 amKEF - DEN
Nonstop7h 55mIcelandair
Fri 8/84:40 pmDEN - KEF
Nonstop7h 20mIcelandair
Deal found 4/29$667
This British Airways deal was found by Cheapflights users on 4/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1610:30 amKEF - DEN
2 stops36h 37mBritish Airways
Tue 5/206:35 pmDEN - KEF
1 stop33h 05mBritish Airways
Deal found 4/29$1,000
This Finnair deal was found by Cheapflights users on 4/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/285:15 pmKEF - DEN
2 stops29h 10mFinnair
Wed 6/412:16 pmDEN - KEF
2 stops22h 14mFinnair
Deal found 4/29$1,004
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1610:30 amKEF - DEN
1 stop35h 55mAmerican Airlines
Tue 5/206:35 pmDEN - KEF
1 stop33h 05mAmerican Airlines
Deal found 4/29$1,010
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/148:50 amKEF - DEN
2 stops17h 08mDelta
Mon 5/197:06 amDEN - KEF
1 stop20h 24mDelta
Deal found 4/29$1,117
This KAYAK deal was found by Cheapflights users on 4/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/3010:30 amKEF - DEN
2 stops42h 34mScandinavian Airlines
Fri 8/87:10 amDEN - KEF
2 stops34h 40mScandinavian Airlines
Deal found 4/29$1,146
This Lufthansa deal was found by Cheapflights users on 4/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/151:15 amKEF - DEN
1 stop23h 25mLufthansa
Tue 5/2010:15 amDEN - KEF
2 stops31h 20mLufthansa
Deal found 4/29$1,456
This Austrian Airlines deal was found by Cheapflights users on 4/29. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2912:10 amKEF - DEN
2 stops43h 50mAustrian Airlines
Fri 8/85:40 pmDEN - KEF
2 stops23h 40mAustrian Airlines
Deal found 4/29$1,792

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 April 29, 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

Tue 6/10

9:35 am-11:27 am

1 stop31h 52m

Denver Intl

Tue 6/24

12:15 pm-8:15 am

1 stop14h 00m

$496

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Tue 6/10

9:35 am-7:23 pm

2 stops15h 48m

Denver Intl

Tue 6/24

12:15 pm-8:15 am

1 stop14h 00m

$633

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Wed 7/30

10:35 am-12:30 pm

Nonstop7h 55m

Denver Intl

Fri 8/8

4:40 pm-6:00 am

Nonstop7h 20m

$667

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Fri 5/16

10:30 am-5:07 pm

2 stops36h 37m

Denver Intl

Tue 5/20

6:35 pm-9:40 am

1 stop33h 05m

$1,000

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Wed 5/28

5:15 pm-4:25 pm

2 stops29h 10m

Denver Intl

Wed 6/4

12:16 pm-4:30 pm

2 stops22h 14m

$1,004

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Fri 5/16

10:30 am-4:25 pm

1 stop35h 55m

Denver Intl

Tue 5/20

6:35 pm-9:40 am

1 stop33h 05m

$1,010

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Wed 5/14

8:50 am-7:58 pm

2 stops17h 08m

Denver Intl

Mon 5/19

7:06 am-9:30 am

1 stop20h 24m

$1,117

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Wed 7/30

10:30 am-11:04 pm

2 stops42h 34m

Denver Intl

Fri 8/8

7:10 am-11:50 pm

2 stops34h 40m

$1,146

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Thu 5/15

1:15 am-6:40 pm

1 stop23h 25m

Denver Intl

Tue 5/20

10:15 am-11:35 pm

2 stops31h 20m

$1,456

ReykjavikDenver

KEF - DEN

KEFDEN

Reykjavik Keflavik Intl

Tue 7/29

12:10 am-2:00 pm

2 stops43h 50m

Denver Intl

Fri 8/8

5:40 pm-11:20 pm

2 stops23h 40m

$1,792

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 21 results
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Compare providers for flights from Keflavik Intl to Denver

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 Keflavik Intl to Denver in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 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 Reykjavik Keflavik Intl Airport-Denver flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Reykjavik Keflavik Intl Airport-Denver flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Reykjavik Keflavik Intl Airport-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Reykjavik Keflavik Intl Airport-Denver flights, Cheapflights users trust AranGrant the most. AranGrant 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 Reykjavik Keflavik Intl Airport-Denver 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 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 April 29, 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 at noon tend to be the most expensive. A flight in the morning could potentially save you up to 3% on airfare.

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 April 29, 2025.
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 0 inbound flights from Reykjavik Keflavik Intl per day. 1 airline has flights to Denver Intl from Reykjavik Keflavik Intl on a regular basis.

  • What are the cheapest airlines flying from Reykjavik Keflavik Intl Airport to Denver round-trip?

    Cheapflights users have booked flights from Reykjavik Keflavik Intl Airport to Denver round-trip from $496. Other airlines that can offer you cheap pricing are Icelandair, from $667, and British Airways, from $1,000. WestJet is priced at 28% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $281. However, be on the lookout for offers from Icelandair and British Airways, as they are both options that can get you from Reykjavik Keflavik Intl Airport to Denver for a low price.

  • 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 $1,410, our data indicates the cheapest price to be $441. The most popular route (Reykjavik Keflavik Intl - Denver Intl), is priced around $581.

  • 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 Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Westminster
Black Hawk
Winter Park
Lakewood
Cripple Creek
Silverthorne
Brighton
Golden
Thornton
Greeley
Frisco
Grand Lake
Broomfield
Central City
Glendale
Copper Mountain
Wheat Ridge
Longmont
Idaho Springs
Limon

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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$543Average$629FlexibilityNo cancel feeOn-time76%

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