The cheapest times to fly from REP to PHX are

  • February 5th to April 22nd
  • June 11th to June 24th
  • August 27th to October 7th
  • October 22nd to December 2nd (except the weeks of October 29th and November 19th)

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 REP to PHX is early October. Prices can be as high as $3276 for Tuesday flights during late July, or as low as $913 for Monday flights around early October.


When to Fly to Phoenix

Flying from Siem Reap (REP) to Phoenix, AZ (PHX) will usually cost between $1003 to $1816 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early October with an average ticket price of $1034. Due to high demand the most expensive time to fly is late July, with an average price of $1856. Planning your trip to low-cost times can easily save you $821 on economy flights and even more on first-class flights. Generally, any price below $1121 can be considered a good price for a round-trip REP to PHX flight.

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

REP to PHX Flight Prices

Compared to other flights, the REP to PHX flight is slightly more expensive than the average and costs about as much as the average flight leaving from Krong Siem Reap. The average price per mile (for a direct flight) is $0.08, which is far below average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to fly to PHX, and Tuesday the cheapest day to fly back into REP. Tuesdays are the most expensive days to fly to Phoenix, and Fridays are the most expensive days to return to Krong Siem Reap. 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 Monday and returning a week later will cost an average of $1124. Return trip prices are from the PHX to REP 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 REP to PHX 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.


Flight Hacking REP to PHX

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 REP to PHX — but Champion Traveler does!

Hack #1: Hong Kong (REP > HKG > PHX)

  • Price for both tickets: $991
  • Average savings: $130 (11.56%)

See REP to LAX flights

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

  • Price for both tickets: $1040
  • Average savings: $81 (7.18%)

See REP to HKG flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 15 major airlines flying this route most often: Air Canada, American, ANA, Asiana, Bangkok Airways, 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 Phoenix Sky Harbor International Airport to Siem Reap International Airport?

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

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

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

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

It depends on the day of the week and the date, but a typical day might have around 14 available flights from REP to PHX.


Airport Location Info


Departing Airport

Origination codeREP
Origination airport nameSiem Reap International Airport
CitySiem Reap

Return Airport

Destination codePHX
Destination airport namePhoenix Sky Harbor International Airport
CityPhoenix, AZ
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.