The cheapest times to fly from HNL to KOS are

  • January 22nd to April 15th
  • April 30th to May 20th (except the week of May 7th)
  • June 4th to July 8th (except the week of June 11th)

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 HNL to KOS is late March. Prices can be as high as $12600 for Tuesday flights during early January, or as low as $1198 for Sunday flights around late March.


When to Fly to Sihanoukville

Flying from Honolulu, HI (HNL) to Kompongsom (KOS) will usually cost between $1939 to $7119 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late March with an average ticket price of $1554. Due to high demand the most expensive time to fly is early January, with an average price of $10378. Planning your trip to low-cost times can easily save you $8825 on economy flights and even more on first-class flights. Generally, any price below $3750 can be considered a good price for a round-trip HNL to KOS flight.

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

HNL to KOS Flight Prices

Compared to other flights, the HNL to KOS flight is more expensive than the average and costs more than the average flight leaving from Honolulu. The average price per mile (for a direct flight) is $0.36, which is a bit above average.


Flight Prices by Day of the Week

Sunday is usually the cheapest day to fly to KOS, and Thursday the cheapest day to fly back into HNL. Tuesdays are the most expensive days to fly to Sihanoukville, and Wednesdays are the most expensive days to return to Honolulu. 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 Sunday and returning a week later will cost an average of $2512. Return trip prices are from the KOS to HNL 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 HNL 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 12 hour 39 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 HNL to KOS while comparing.

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

  • 102 miles (164 km) away from KOS
  • Usually 74.12% less expensive than KOS
  • 1-layover flights available

See HNL to PNH flights

Destination alternative #2: Phu Quoc International Airport (PQC) in Phu Quoc

  • 36 miles (58 km) away from KOS
  • Usually 63.28% less expensive than KOS
  • 1-layover flights available

See HNL to PQC flights


Flight Hacking HNL 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 HNL to KOS — but Champion Traveler does!

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

  • Price for both tickets: $850
  • Average savings: $2901 (77.35%)

See HNL to KUL flights

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

  • Price for both tickets: $1048
  • Average savings: $2703 (72.07%)

See HNL to SGN flights

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

  • Price for both tickets: $1319
  • Average savings: $2432 (64.84%)

See HNL to PNH flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 11 major airlines flying this route most often: American, ANA, Asiana, China Southern, Delta, Hainan, Hawaiian, JAL, United, Vietnam Airlines, Xiamen, and potentially more during busy seasons.

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

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

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

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

How many flights go between Honolulu, HI and Kompongsom?

It depends on the day of the week and the date, but a typical day might have around 23 available flights from HNL to KOS.


Airport Location Info


Departing Airport

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

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.