The cheapest times to fly from KOS to HNL are

  • January 8th to March 18th (except the weeks of January 15th and February 5th)
  • April 2nd to May 20th (except the week of April 23rd)
  • September 3rd to October 7th
  • November 5th to December 23rd

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 HNL is late September. Prices can be as high as $10800 for Wednesday flights during mid October, or as low as $1412 for Thursday flights around late September.


When to Fly to Honolulu

Flying from Kompongsom (KOS) to Honolulu, HI (HNL) will usually cost between $1607 to $6185 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late September with an average ticket price of $1703. Due to high demand the most expensive time to fly is mid October, with an average price of $5035. Planning your trip to low-cost times can easily save you $3332 on economy flights and even more on first-class flights. Generally, any price below $2555 can be considered a good price for a round-trip KOS to HNL flight.

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

KOS to HNL Flight Prices

Compared to other flights, the KOS to HNL 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 $0.24, which is below average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to HNL, and Sunday the cheapest day to fly back into KOS. Wednesdays are the most expensive days to fly to Honolulu, and Tuesdays are the most expensive days to return to Sihanoukville. Selecting flights on the least expensive days could save you up to $2046 (42%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $2151. Return trip prices are from the HNL 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 HNL can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 12 hour 39 minutes may not be realistic.


Flight Hacking KOS to HNL

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 HNL — but Champion Traveler does!

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

  • Price for both tickets: $888
  • Average savings: $1667 (65.26%)

See KOS to SGN flights

Hack #2: Ho Chi Minh City (KOS > SGN > HNL)

  • Price for both tickets: $1154
  • Average savings: $1401 (54.84%)

See KOS to KUL flights

Hack #3: Phnom Penh (KOS > PNH > HNL)

  • Price for both tickets: $1413
  • Average savings: $1142 (44.69%)

See KOS to PNH flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 12 major airlines flying this route most often: American, ANA, Asiana, China Southern, Delta, Hainan, Hawaiian, JAL, Shenzhen, United, Vietnam Airlines, Xiamen, and potentially more during busy seasons.

How far away is it from Daniel K Inouye International Airport to Kompongsom Airport?

The distance between the two airports is roughly 6482 miles or 10432 kilometers.

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

The real-world flight time for a nonstop KOS to HNL flight is about 12 hour 39 minutes.

How many flights go between Kompongsom and Honolulu, HI?

It depends on the day of the week and the date, but a typical day might have around 7 available flights from KOS to HNL.


Airport Location Info


Departing Airport

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

Return Airport

Destination code HNL
Destination airport name Daniel K Inouye International Airport
City Honolulu, HI
Country the United States
Latitude 21.3
Longitude -157.9


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.