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Keflavik Intl

$231+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KEF
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap 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 September 15, 2025.

Round-trip from

$432
(Ticket)

One-way from

$231
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$629

Good round-trip deal

$468 or less

Good one-way deal

$388 or less
From Denver Intl to Reykjavik Keflavik Intl
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One-way flight from Denver Intl to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 5% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 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 round-trip flight from Denver Intl to Reykjavik Keflavik Intl.
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Price to beat on a one-way flight from Denver Intl to Reykjavik Keflavik Intl.
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Find 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 September 15, 2025.

This Ticket deal was found by Cheapflights users on 9/13. 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.
Thu 10/234:40 pmDEN - KEF
Nonstop7h 20mIcelandair
Thu 10/304:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 9/13$432
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/174:34 pmDEN - KEF
1 stop30h 21mMultiple Airlines
Tue 10/213:05 pmKEF - DEN
1 stop24h 03mMultiple Airlines
Deal found 9/13$434
This FlightHub deal was found by Cheapflights users on 9/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/23:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Thu 11/134:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 9/13$437
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:38 amDEN - KEF
1 stop16h 17mMultiple Airlines
Wed 10/223:05 pmKEF - DEN
1 stop24h 03mMultiple Airlines
Deal found 9/14$443
This Icelandair 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/314:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Thu 11/134:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 9/15$449
This Icelandair 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/33:40 pmDEN - KEF
Nonstop7h 25mIcelandair
Mon 11/104:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 9/15$467
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/174:34 pmDEN - KEF
1 stop30h 21mMultiple Airlines
Wed 10/223:05 pmKEF - DEN
1 stop24h 03mMultiple Airlines
Deal found 9/14$471
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/224:40 pmDEN - KEF
Nonstop7h 20mIcelandair
Wed 10/294:55 pmKEF - DEN
Nonstop8h 10mIcelandair
Deal found 9/14$475
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/174:34 pmDEN - KEF
1 stop30h 21mMultiple Airlines
Mon 10/203:05 pmKEF - DEN
1 stop24h 03mMultiple Airlines
Deal found 9/13$485

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 September 15, 2025.
Use the filters below to find and compare flights from Denver to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Denver

Fly to

Keflavik Intl

Route

Depart

Return

Price

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Mon 11/3

3:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Fri 11/14

4:55 pm-6:05 pm

Nonstop8h 10m

$527

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 11/5

3:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Thu 11/13

4:55 pm-6:05 pm

Nonstop8h 10m

$527

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Thu 11/6

3:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Mon 11/10

4:55 pm-6:05 pm

Nonstop8h 10m

$544

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 11/5

3:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Mon 11/10

4:55 pm-6:05 pm

Nonstop8h 10m

$544

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Fri 10/31

4:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Sun 11/9

4:55 pm-6:05 pm

Nonstop8h 10m

$562

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Mon 11/3

3:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Sun 11/9

4:55 pm-6:05 pm

Nonstop8h 10m

$562

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sun 11/2

3:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Sun 11/9

4:55 pm-6:05 pm

Nonstop8h 10m

$562

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 11/1

4:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Wed 11/12

4:55 pm-6:05 pm

Nonstop8h 10m

$612

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Sat 11/1

4:40 pm-6:05 am

Nonstop7h 25m

Reykjavik Keflavik Intl

Thu 11/13

4:55 pm-6:05 pm

Nonstop8h 10m

$612

DenverReykjavik

DEN - KEF

DENKEF

Denver Intl

Wed 10/22

7:00 am-4:55 am

3 stops39h 55m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 16 results
1
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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?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Keflavik Intl. Price data was last updated on September 12, 2025.

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 42 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, November is the cheapest month in which you can book a flight from Denver to Reykjavik Keflavik Intl Airport (average of $328). Flying from Denver to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $656). 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 September 15, 2025.

One of the essential ways to save on airfare from Denver to Reykjavik Keflavik Intl Airport is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 23% on airfare.

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

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

Travelers seeking maximum savings on their Denver 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.

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 September 15, 2025.
Peruse reviews from past customers who have flown with United Airlines and 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.
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Boarding

7.7

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Boarding

7.7

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Icelandair
7.0
Good
544 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Boarding

7.7

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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. 2 airlines 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 1 outbound flight 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 7h 25m. Icelandair provides one of the quickest options available for as low as $527. The distance from Denver to Reykjavik Keflavik Intl Airport is about 3556 mi. Generally, flights for this route are nonstop.

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

    Currently priced at $451, 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. Check Cheapflights for deals on United Airlines for as low as $523. 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 Denver to Reykjavik Keflavik Intl Airport?

    On average you can expect to pay $1,147 for a flight from Denver to Reykjavik Keflavik Intl Airport. The cheapest flight overall is $353 while the most popular route, (Denver Intl - Reykjavik Keflavik Intl) is currently priced at $386.

  • 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, November is the cheapest month in which you can book a flight from Denver to Reykjavik Keflavik Intl Airport (average of $328). Flying from Denver to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $656). 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 Denver to Keflavik Intl

Discover the top 2 airlines 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$451Average$629FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$523Average$674FlexibilityNo cancel feeOn-time69%

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