The cheapest times to fly from PHX to REP are

  • January 8th to May 6th
  • October 29th to December 9th (except the week of November 12th)

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 PHX to REP is late January and early February. Prices can be as high as $2066 for Friday flights during early August, or as low as $835 for Tuesday flights around late January and early February.


When to Fly to Krong Siem Reap

Flying from Phoenix, AZ (PHX) to Siem Reap (REP) will usually cost between $857 to $1676 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January and early February with an average ticket price of $930. Due to high demand the most expensive time to fly is early August, with an average price of $1766. Planning your trip to low-cost times can easily save you $836 on economy flights and even more on first-class flights. Generally, any price below $1076 can be considered a good price for a round-trip PHX to REP flight.

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

PHX to REP Flight Prices

Compared to other flights, the PHX to REP flight is priced close to the average and costs slightly more than the average flight leaving from Phoenix. The average price per mile (for a direct flight) is $0.08, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to REP, and Monday the cheapest day to fly back into PHX. Fridays are the most expensive days to fly to Krong Siem Reap, and Tuesdays are the most expensive days to return to Phoenix. Selecting flights on the least expensive days could save you up to $159 (12%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1087. Return trip prices are from the REP to PHX 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 PHX to REP 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 9 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 PHX to REP while comparing.

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

  • 146 miles (235 km) away from REP
  • Usually 6.51% less expensive than REP
  • 2-layover flights available

See PHX to PNH flights


Flight Hacking PHX to REP

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 PHX to REP — but Champion Traveler does!

Hack #1: Shanghai (PHX > PVG > REP)

  • Price for both tickets: $960
  • Average savings: $117 (10.83%)

See PHX to PVG flights

Hack #2: Los Angeles, CA (PHX > LAX > REP)

  • Price for both tickets: $973
  • Average savings: $104 (9.62%)

See PHX to LAX flights

Hack #3: Singapore (PHX > SIN > REP)

  • Price for both tickets: $980
  • Average savings: $97 (8.97%)

See PHX to SIN flights


Flight Questions Answered

Still have questions about flying from PHX to REP? We’ve got answers.

Which airlines fly this route?

You can find 14 major airlines flying this route most often: Air Canada, American, ANA, Asiana, British Airways, Cathay Pacific, China Eastern, China Southern, Delta, JAL, Singapore Airlines, United, Vietnam Airlines, Xiamen, and potentially more during busy seasons.

How far away is it from Siem Reap International Airport to Phoenix Sky Harbor International Airport?

The distance between the two airports is roughly 8430 miles or 13567 kilometers.

How long does it take to fly from PHX to REP?

The real-world flight time for a nonstop PHX to REP flight is about 16 hour 9 minutes.

How many flights go between Phoenix, AZ and Siem Reap?

It depends on the day of the week and the date, but a typical day might have around 11 available flights from PHX to REP.


Airport Location Info


Departing Airport

Origination codePHX
Origination airport namePhoenix Sky Harbor International Airport
CityPhoenix, AZ
Countrythe United States

Return Airport

Destination codeREP
Destination airport nameSiem Reap International Airport
CitySiem Reap


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.