HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kos

$476+ Cheap flights from Denver (DEN) to Kos (KGS)

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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — KGS
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Kos 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 Kos

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Kos (KGS). 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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,050
(SWISS)

One-way from

$476
(Kiwi.com)
Provider with most accurate pricing for Denver Intl-Kos flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Kos flights.
Search Deals
From Denver Intl to Kos
Search Deals
One-way flight from Denver Intl to Kos
Search Deals

Find flight deals from Denver to Kos

Cheapest flights from Denver to Kos
Explore the most affordable flight options available from Denver to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 26, 2025.

This SWISS deal was found by Cheapflights users on 3/24. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/95:50 pmDEN - KGS
1 stop36h 20mSWISS
Tue 7/298:30 pmKGS - DEN
1 stop28h 50mSWISS
Deal found 3/24$1,050
This Lufthansa deal was found by Cheapflights users on 3/24. 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.
Tue 7/84:15 pmDEN - KGS
1 stop17h 50mLufthansa
Wed 7/307:55 pmKGS - DEN
1 stop26h 50mLufthansa
Deal found 3/24$1,065
This United deal was found by Cheapflights users on 3/24. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/114:15 pmDEN - KGS
1 stop18h 10mMultiple Airlines
Thu 7/3111:00 amKGS - DEN
1 stop38h 20mMultiple Airlines
Deal found 3/24$1,162
This Expedia deal was found by Cheapflights users on 3/24. 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.
Fri 7/118:00 amDEN - KGS
2 stops26h 35mBrussels Airlines
Thu 7/3111:25 amKGS - DEN
2 stops35h 35mBrussels Airlines
Deal found 3/24$1,454
This British Airways deal was found by Cheapflights users on 3/24. 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.
Tue 7/86:35 pmDEN - KGS
1 stop17h 10mBritish Airways
Sun 8/39:05 pmKGS - DEN
1 stop28h 20mBritish Airways
Deal found 3/24$2,291

Cheapflights Fare Finder

Customize your flight search to find flights from Denver to Kos 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 March 26, 2025.
Use the filters below to find and compare flights from Denver to Kos that are best for you.

Fly from

Denver

Fly to

Kos

Route

Depart

Return

Price

DenverKos

DEN - KGS

DENKGS

Denver Intl

Wed 7/9

5:50 pm-3:10 pm

1 stop36h 20m

Kos

Tue 7/29

8:30 pm-4:20 pm

1 stop28h 50m

$1,050

DenverKos

DEN - KGS

DENKGS

Denver Intl

Tue 7/8

4:15 pm-7:05 pm

1 stop17h 50m

Kos

Wed 7/30

7:55 pm-1:45 pm

1 stop26h 50m

$1,065

DenverKos

DEN - KGS

DENKGS

Denver Intl

Fri 7/11

4:15 pm-7:25 pm

1 stop18h 10m

Kos

Thu 7/31

11:00 am-4:20 pm

1 stop38h 20m

$1,162

DenverKos

DEN - KGS

DENKGS

Denver Intl

Fri 7/11

8:00 am-7:35 pm

2 stops26h 35m

Kos

Thu 7/31

11:25 am-2:00 pm

2 stops35h 35m

$1,454

DenverKos

DEN - KGS

DENKGS

Denver Intl

Tue 7/8

6:35 pm-8:45 pm

1 stop17h 10m

Kos

Sun 8/3

9:05 pm-4:25 pm

1 stop28h 20m

$2,291

DenverKos

DEN - KGS

DENKGS

Denver Intl

Thu 8/14

11:30 am-8:40 pm

3 stops48h 10m

$476

DenverKos

DEN - KGS

DENKGS

Denver Intl

Fri 8/15

4:15 pm-7:25 pm

1 stop18h 10m

$827

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Compare providers for flights from Denver to Kos

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 Kos in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*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 Denver-Kos flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Kos flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Kos flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Kos 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-Kos 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 Kos

Have a flexible travel schedule? Discover the best time to fly to Kos 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 Kos

Rainfall in Kos by month

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

In terms of precipitation, rainfall in Kos ranges from 0.1 - 6.7 inches per month. January is typically the wettest month, when rainfall can reach 6.7 in. July is typically the driest time to visit Kos when rainfall is around 0.1 in.

Temperature in Kos by month

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

If weather is an important factor for your trip to Kos, 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 78.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 50.0 F).

Reviews of airlines servicing Kos

Get insights into the airlines that provide service to Kos. 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 Kos. Reviews last updated March 26, 2025.
SWISS
7.5
Good
1,569 reviews

Boarding

7.6

Comfort

7.3

Overall

7.5

Crew

8.2

Entertainment

6.7

Food

7.0

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.
SWISS
7.5
Good
1,569 reviews
SWISS
7.5
Good
1,569 reviews

Boarding

7.6

Comfort

7.3

Overall

7.5

Crew

8.2

Entertainment

6.7

Food

7.0

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.
Brussels Airlines
7.4
Good
344 reviews
SWISS
7.5
Good
1,569 reviews

Boarding

7.6

Comfort

7.3

Overall

7.5

Crew

8.2

Entertainment

6.7

Food

7.0

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.
Lufthansa
6.7
Okay
6,950 reviews
SWISS
7.5
Good
1,569 reviews

Boarding

7.6

Comfort

7.3

Overall

7.5

Crew

8.2

Entertainment

6.7

Food

7.0

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.
British Airways
6.6
Okay
6,712 reviews
SWISS
7.5
Good
1,569 reviews

Boarding

7.6

Comfort

7.3

Overall

7.5

Crew

8.2

Entertainment

6.7

Food

7.0

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

ZRH - ATH

The website is difficult to navigate. You pay for everything. The carry on baggage policy is complicated. The food choices were poor and the seat was uncomfortable.

Related info for your journey

Find useful and relevant information for your journey from Denver to Kos. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

  • How can I find direct flights from Denver to Kos?

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

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

    Yes. Cheapflights offers flight deals from Denver to Kos by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Kardamena

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Kos

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Santorini flights
Denver to Mykonos flights
Denver to Naxos flights
Denver to Paleochori flights
Denver to Parikia flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.