The cheapest times to fly from DEN to KOS are

  • January 1st to March 25th
  • April 16th to July 29th (except the week of May 21st)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from DEN to KOS is early to mid March. Prices can be as high as $12532 for Saturday flights during early to mid October, or as low as $1488 for Sunday flights around early to mid March.


When to Fly to Sihanoukville

Flying from Denver, CO (DEN) to Kompongsom (KOS) will usually cost between $2031 to $8579 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid March with an average ticket price of $3926. Due to high demand the most expensive time to fly is early to mid October, with an average price of $7607. Planning your trip to low-cost times can easily save you $3681 on economy flights and even more on first-class flights. Generally, any price below $5616 can be considered a good price for a round-trip DEN to KOS flight.

See below for a graph of average weekly prices for the DEN to KOS route. All prices are for round-trip tickets in USD.

DEN to KOS Flight Prices

Compared to other flights, the DEN to KOS flight is more expensive than the average and costs more than the average flight leaving from Denver. The average price per mile (for a direct flight) is $0.41, which is a bit above average.


Flight Prices by Day of the Week

Sunday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $2294 (34%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Sunday and returning a week later will cost an average of $4453. Return trip prices are from the KOS to DEN flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from DEN to KOS can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 16 hour 17 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from DEN to KOS while comparing.

Destination alternative #1: Phnom Penh International Airport (PNH) in Phnom Penh

  • 102 miles (164 km) away from KOS
  • Usually 82.34% less expensive than KOS
  • 1-layover flights available

See DEN to PNH flights


Flight Hacking DEN to KOS

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from DEN to KOS — but Champion Traveler does!

Hack #1: Kuala Lumpur (DEN > KUL > KOS)

  • Price for both tickets: $1149
  • Average savings: $4467 (79.54%)

See DEN to KUL flights

Hack #2: San Francisco, CA (DEN > SFO > KOS)

  • Price for both tickets: $1218
  • Average savings: $4399 (78.32%)

See DEN to SFO flights

Hack #3: Ho Chi Minh City (DEN > SGN > KOS)

  • Price for both tickets: $1295
  • Average savings: $4322 (76.95%)

See DEN to SGN flights


Flight Questions Answered

Still have questions about flying from DEN to KOS? We’ve got answers.

Which airlines fly this route?

You can find 18 major airlines flying this route most often: Air Canada, Alaska, American, ANA, Asiana, China Airlines, China Southern, Delta, EVA Air, Frontier, Hainan, JAL, Shenzhen, Sichuan Airlines, United, Vietnam Airlines, WestJet, Xiamen, and potentially more during busy seasons.

How far away is it from Kompongsom Airport to Denver International Airport?

The distance between the two airports is roughly 8504 miles or 13686 kilometers.

How long does it take to fly from DEN to KOS?

The real-world flight time for a nonstop DEN to KOS flight is about 16 hour 17 minutes.

How many flights go between Denver, CO and Kompongsom?

It depends on the day of the week and the date, but a typical day might have around 8 available flights from DEN to KOS.


Airport Location Info


Departing Airport

Origination code DEN
Origination airport name Denver International Airport
City Denver, CO
Country the United States
Latitude 39.9
Longitude -104.7

Return Airport

Destination code KOS
Destination airport name Kompongsom Airport
City Kompongsom
Country Cambodia
Latitude 10.6
Longitude 103.7


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.