The cheapest times to fly from ATL to REP are

  • January 8th to January 28th
  • February 26th to April 22nd (except the week of March 19th)
  • August 6th to November 18th

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 ATL to REP is early to mid September. Prices can be as high as $3214 for Monday flights during mid December, or as low as $1114 for Wednesday flights around early to mid September.


When to Fly to Krong Siem Reap

Flying from Atlanta, GA (ATL) to Siem Reap (REP) will usually cost between $1196 to $2221 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid September with an average ticket price of $1189. Due to high demand the most expensive time to fly is mid December, with an average price of $2402. Planning your trip to low-cost times can easily save you $1213 on economy flights and even more on first-class flights. Generally, any price below $1506 can be considered a good price for a round-trip ATL to REP flight.

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

ATL to REP Flight Prices

Compared to other flights, the ATL to REP flight is more expensive than the average and costs slightly more than the average flight leaving from Atlanta. The average price per mile (for a direct flight) is $0.1, which is far below average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to depart and return on this flight. Mondays are the most expensive days to fly to Krong Siem Reap, and Tuesdays are the most expensive days to return to Atlanta. Selecting flights on the least expensive days could save you up to $324 (17%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $1503. Return trip prices are from the REP to ATL 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 ATL to REP can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 17 hour 26 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 ATL to REP while comparing.

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

  • 146 miles (235 km) away from REP
  • Usually 20.76% less expensive than REP
  • 1-layover flights available

See ATL to PNH flights


Flight Hacking ATL 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 ATL to REP — but Champion Traveler does!

Hack #1: New York, NY (ATL > JFK > REP)

  • Price for both tickets: $1112
  • Average savings: $394 (26.17%)

See ATL to JFK flights

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

  • Price for both tickets: $1137
  • Average savings: $369 (24.51%)

See ATL to LAX flights

Hack #3: San Francisco, CA (ATL > SFO > REP)

  • Price for both tickets: $1193
  • Average savings: $313 (20.76%)

See ATL to SFO flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 25 major airlines flying this route most often: Air Canada, Air France, Alaska, American, ANA, Asiana, Bangkok Airways, British Airways, Cathay Dragon, Cathay Pacific, China Airlines, China Eastern, China Southern, Delta, EVA Air, Finnair, JAL, JetBlue, KLM, Qatar Airways, Singapore Airlines, THAI, United, Vietnam Airlines, WestJet, and potentially more during busy seasons.

How far away is it from Siem Reap International Airport to Hartsfield-Jackson Atlanta International Airport?

The distance between the two airports is roughly 9139 miles or 14708 kilometers.

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

The real-world flight time for a nonstop ATL to REP flight is about 17 hour 26 minutes.

How many flights go between Atlanta, GA and Siem Reap?

It depends on the day of the week and the date, but a typical day might have around 63 available flights from ATL to REP.


Airport Location Info


Departing Airport

Origination code ATL
Origination airport name Hartsfield-Jackson Atlanta International Airport
City Atlanta, GA
Country the United States
Latitude 33.6
Longitude -84.4

Return Airport

Destination code REP
Destination airport name Siem Reap International Airport
City Siem Reap
Country Cambodia
Latitude 13.4
Longitude 103.8


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.