$348+ Cheap flights from Denver (DEN) to Keflavik Intl (KEF)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KEF
Oct 23 — Oct 301
Round-trip
1 adult, Economy
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Find cheap flights from Denver 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 Denver to Keflavik Intl
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Last-minute
One-way
Cheapest flights from Denver to Keflavik IntlExplore 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 23, 2026.
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 23, 2026.
This Mytrip deal was found by Cheapflights users on 9/19. 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.
Mon 10/194:40 pm -
Nonstop7h 20m
Wed 10/284:55 pm -
Nonstop8h 05m
Deal found 9/19![Icelandair logo]()
$425
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/33:40 pm -
Nonstop7h 25m
Tue 11/174:55 pm -
Nonstop8h 05m
Deal found 9/19![Icelandair logo]()
$426
This Justfly.com deal was found by Cheapflights users on 9/20. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/33:40 pm -
Nonstop7h 25m
Tue 11/104:55 pm -
Nonstop8h 05m
Deal found 9/20![Icelandair logo]()
$437
This Kiwi.com deal was found by Cheapflights users on 9/20. 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 11/113:40 pm -
Nonstop7h 25m
Mon 11/234:55 pm -
Nonstop8h 05m
Deal found 9/20![Icelandair logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 9/20. 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 11/63:40 pm -
Nonstop7h 25m
Wed 11/114:55 pm -
Nonstop8h 05m
Deal found 9/20![Icelandair logo]()
$447
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Sun 10/186:00 am -
1 stop20h 50m
Thu 10/2210:00 am -
1 stop30h 27m
Deal found 9/22![United Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 9/20. 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.
Sun 11/157:45 am -
1 stop19h 15m
Mon 11/2312:00 pm -
1 stop13h 13m
Deal found 9/20![United Airlines logo]()
$471
This Air Canada deal was found by Cheapflights users on 9/20. 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.
Sun 10/184:17 pm -
1 stop10h 28m
Thu 10/2210:00 am -
1 stop16h 17m
Deal found 9/20![Air Canada logo]()
$472
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 10/37:10 pm -
1 stop31h 40m
Thu 10/1512:00 pm -
1 stop17h 54m
Deal found 9/23![United Airlines logo]()
$477
Best flights from Denver to Keflavik IntlDiscover carefully curated flight deals from Denver to Keflavik Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
Discover carefully curated flight deals from Denver to Keflavik Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
This United Airlines deal was found by Cheapflights users on 9/21. 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.
Sun 10/186:00 am -
1 stop20h 50m
Thu 10/2210:00 am -
1 stop30h 27m
Deal found 9/21![United Airlines logo]()
$469
This Finnair deal was found by Cheapflights users on 9/22. 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.
Fri 1/221:13 pm -
2 stops21h 02m
Tue 1/266:00 pm -
2 stops33h 06m
Deal found 9/22![Finnair logo]()
$802
This Finnair deal was found by Cheapflights users on 9/21. 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 2/31:13 pm -
2 stops21h 02m
Mon 2/810:00 am -
2 stops43h 54m
Deal found 9/21![Multiple Airlines logo]()
$805
This United Airlines deal was found by Cheapflights users on 9/18. 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.
Sat 11/287:40 pm -
2 stops31h 20m
Mon 12/712:00 pm -
1 stop13h 04m
Deal found 9/18![United Airlines logo]()
$607
This United Airlines deal was found by Cheapflights users on 9/18. 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.
Fri 10/164:17 pm -
1 stop10h 28m
Fri 10/239:15 am -
2 stops31h 17m
Deal found 9/18![United Airlines logo]()
$695
This Icelandair deal was found by Cheapflights users on 9/23. 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 12/1410:55 am -
2 stops12h 15m
Fri 12/185:00 pm -
1 stop12h 52m
Deal found 9/23![Multiple Airlines logo]()
$868
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sun 10/116:00 am -
1 stop20h 50m
Wed 10/219:15 am -
2 stops37h 07m
Deal found 9/23![United Airlines logo]()
$719
This Finnair deal was found by Cheapflights users on 9/23. 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.
Fri 10/232:29 pm -
2 stops36h 46m
Fri 11/610:00 am -
2 stops36h 10m
Deal found 9/23![Finnair logo]()
$877
This Icelandair deal was found by Cheapflights users on 9/21. 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 11/2012:35 pm -
1 stop11h 00m
Tue 11/244:55 pm -
Nonstop8h 05m
Deal found 9/21![Multiple Airlines logo]()
$924
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Wed 10/146:00 am -
2 stops20h 45m
Mon 10/2612:00 pm -
1 stop16h 44m
Deal found 9/23![United Airlines logo]()
$809
Last-minute flights from Denver to Keflavik IntlDiscover last-minute flight deals from Denver to Keflavik Intl. Data last updated September 23, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Keflavik Intl. Data last updated September 23, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 10/37:10 pm -
1 stop31h 40m
Thu 10/1512:00 pm -
1 stop17h 54m
Deal found 9/23![United Airlines logo]()
$477
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sun 10/46:00 am -
1 stop20h 50m
Thu 10/1512:00 pm -
1 stop17h 54m
Deal found 9/23![United Airlines logo]()
$471
This Trip.com deal was found by Cheapflights users on 9/19. 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.
Sat 10/179:40 am -
1 stop16h 15m
Sat 10/2410:00 am -
1 stop30h 35m
Deal found 9/19![Air Canada logo]()
$447
This United Airlines deal was found by Cheapflights users on 9/22. 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.
Sun 10/186:00 am -
1 stop20h 50m
Thu 10/2210:00 am -
1 stop30h 27m
Deal found 9/22![United Airlines logo]()
$469
This Air Canada deal was found by Cheapflights users on 9/20. 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.
Sun 10/184:17 pm -
1 stop10h 28m
Thu 10/2210:00 am -
1 stop16h 17m
Deal found 9/20![Air Canada logo]()
$472
This Mytrip deal was found by Cheapflights users on 9/19. 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.
Mon 10/194:40 pm -
Nonstop7h 20m
Wed 10/284:55 pm -
Nonstop8h 05m
Deal found 9/19![Icelandair logo]()
$425
This Cheapflightsfares deal was found by Cheapflights users on 9/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:40 pm -
Nonstop7h 20m
Thu 10/294:55 pm -
Nonstop8h 05m
Deal found 9/18![Icelandair logo]()
$426
This United Airlines deal was found by Cheapflights users on 9/20. 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.
Sat 10/247:10 pm -
1 stop32h 50m
Thu 10/2912:00 pm -
1 stop33h 17m
Deal found 9/20![United Airlines logo]()
$482
One-way flights from Denver to Keflavik IntlSearch for one-way flight options from Denver to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
Search for one-way flight options from Denver to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
This American Airlines deal was found by Cheapflights users on 9/19. 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.
Wed 1/205:01 pm -
1 stop34h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![American Airlines logo]()
$348
This Booking.com deal was found by Cheapflights users on 9/18. 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.
Wed 2/171:30 pm -
2 stops17h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Multiple Airlines logo]()
$354
This Priceline deal was found by Cheapflights users on 9/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/15:01 pm -
2 stops33h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Finnair logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Tue 1/196:19 am -
3 stops46h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 9/21. 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 11/261:15 pm -
3 stops45h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 1/2111:30 pm -
2 stops50h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 1/2210:41 am -
2 stops39h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$383
This oojo deal was found by Cheapflights users on 9/20. 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 12/293:40 pm -
Nonstop7h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Icelandair logo]()
$391
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 1/206:19 am -
3 stops45h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$397
Find 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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $425 (Mytrip) |
One-way from | $348 (American Airlines) |
Popular in | June |
Cheapest in | January |
Average price | $637 |
Good round-trip deal | $637 or less |
Good one-way deal | $317 or less |
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 7,457,451 searches. Data last updated September 23, 2026.
Use the filters below to find and compare flights from Denver to Reykjavik Keflavik Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Wed 1/20
2:33 pm-10:50 am
2 stops37h 17m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$349
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Wed 2/17
1:30 pm-2:20 pm
2 stops17h 50m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$354
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Thu 1/21
8:55 am-10:15 am
3 stops42h 20m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$386
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Sun 10/18
6:00 am-8:50 am
1 stop20h 50m
Reykjavik Keflavik Intl
Thu 10/22
10:00 am-10:27 am
1 stop30h 27m
$469
Quickest round-trip
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Fri 1/22
3:40 pm-6:05 am
Nonstop7h 25m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$475
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Sun 10/4
7:12 pm-8:10 am
2 stops30h 58m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$526
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Sun 10/4
6:00 am-8:50 am
1 stop20h 50m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$530
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Fri 11/27
9:35 am-10:00 am
2 stops17h 25m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$530
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Tue 10/13
6:05 pm-8:45 am
1 stop32h 40m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$534
DenverReykjavik
DEN Denver Intl - KEF Reykjavik Keflavik Intl
DENKEF
Denver Intl
Thu 10/15
6:05 pm-8:45 am
1 stop32h 40m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$534
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Denver to Keflavik Intl
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 Denver to Keflavik Intl in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on Denver-Reykjavik Keflavik Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Reykjavik Keflavik Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Denver-Reykjavik Keflavik Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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 Denver-Reykjavik Keflavik Intl Airport 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 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.
DEN-KEF
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
Prices
Airlines
How far ahead should I book a flight from Denver to Reykjavik Keflavik Intl Airport?
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 3 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, January is the cheapest month in which you can book a flight from Denver to Reykjavik Keflavik Intl Airport (average of $520). Flying from Denver to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $749). 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 23, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Reykjavik Keflavik Intl Airport as you normally would.
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 23, 2026.
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.
Boarding
7.7
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.7
Crew
8.1
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Boarding
7.7
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.7
Crew
8.1
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Boarding
7.7
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.7
Crew
8.1
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
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.
Traveling to a place near Reykjavik Keflavik Intl Airport?
Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locationsKeflavik
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 7,457,451 searches. Data last updated September 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$431 | Average$485 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$448 | Average$632 | FlexibilityNo cancel fee | On-time76% |