The cheapest times to fly from KOS to DEN are

  • April 2nd to June 24th
  • October 22nd to January 7th (except the week of December 10th)

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 KOS to DEN is early June. Prices can be as high as $9827 for Saturday flights during early to mid October, or as low as $965 for Sunday flights around early June.


When to Fly to Denver

Flying from Kompongsom (KOS) to Denver, CO (DEN) will usually cost between $2037 to $5862 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early June with an average ticket price of $2161. Due to high demand the most expensive time to fly is early to mid October, with an average price of $5652. Planning your trip to low-cost times can easily save you $3491 on economy flights and even more on first-class flights. Generally, any price below $2795 can be considered a good price for a round-trip KOS to DEN flight.

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

KOS to DEN Flight Prices

Compared to other flights, the KOS to DEN flight is more expensive than the average and costs more than the average flight leaving from Sihanoukville. The average price per mile (for a direct flight) is $0.2, which is below 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 $2704. Return trip prices are from the DEN to KOS 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 KOS to DEN 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.


Flight Hacking KOS to DEN

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 KOS to DEN — but Champion Traveler does!

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

  • Price for both tickets: $1149
  • Average savings: $1646 (58.89%)

See KOS to LAX flights

Hack #2: Los Angeles, CA (KOS > LAX > DEN)

  • Price for both tickets: $1315
  • Average savings: $1481 (52.97%)

See KOS to KUL flights

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

  • Price for both tickets: $1354
  • Average savings: $1442 (51.57%)

See KOS to SGN flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 16 major airlines flying this route most often: Air Canada, Alaska, American, ANA, China Airlines, China Southern, Delta, EVA Air, Frontier, Hainan, JAL, Sichuan Airlines, United, Vietnam Airlines, WestJet, Xiamen, and potentially more during busy seasons.

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

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

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

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

How many flights go between Kompongsom and Denver, CO?

It depends on the day of the week and the date, but a typical day might have around 2 available flights from KOS to DEN.


Airport Location Info


Departing Airport

Origination codeKOS
Origination airport nameKompongsom Airport

Return Airport

Destination codeDEN
Destination airport nameDenver International Airport
CityDenver, CO
Countrythe United States


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.