The cheapest times to fly from REP to ORD are

  • October 29th to April 1st (except the week of January 1st)

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 ORD is early to mid October. Prices can be as high as $3675 for Tuesday flights during early August, or as low as $1155 for Sunday flights around early to mid October.


When to Fly to Chicago

Flying from Siem Reap (REP) to Chicago, IL (ORD) will usually cost between $1155 to $2821 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid October with an average ticket price of $1243. Due to high demand the most expensive time to fly is early August, with an average price of $3365. Planning your trip to low-cost times can easily save you $2122 on economy flights and even more on first-class flights. Generally, any price below $2089 can be considered a good price for a round-trip REP to ORD flight.

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

REP to ORD Flight Prices

Compared to other flights, the REP to ORD flight is more expensive than the average and costs more than the average flight leaving from Krong Siem Reap. The average price per mile (for a direct flight) is $0.15, which is far below average.


Flight Prices by Day of the Week

Sunday is usually the cheapest day to depart and return on this flight. Tuesdays are the most expensive days to fly to Chicago, and Saturdays are the most expensive days to return to Krong Siem Reap. Selecting flights on the least expensive days could save you up to $655 (30%) 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 $1379. Return trip prices are from the ORD 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 ORD can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 16 hour 21 minutes may not be realistic.


Flight Hacking REP to ORD

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 ORD — but Champion Traveler does!

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

  • Price for both tickets: $1001
  • Average savings: $1088 (52.08%)

See REP to PVG flights

Hack #2: Shanghai (REP > PVG > ORD)

  • Price for both tickets: $1074
  • Average savings: $1015 (48.59%)

See REP to HKG flights

Hack #3: Los Angeles, CA (REP > LAX > ORD)

  • Price for both tickets: $1092
  • Average savings: $998 (47.75%)

See REP to LAX flights


Flight Questions Answered

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

Which airlines fly this route?

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

How far away is it from Chicago O’Hare International Airport to Siem Reap International Airport?

The distance between the two airports is roughly 8536 miles or 13737 kilometers.

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

The real-world flight time for a nonstop REP to ORD flight is about 16 hour 21 minutes.

How many flights go between Siem Reap and Chicago, IL?

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


Airport Location Info


Departing Airport

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

Return Airport

Destination code ORD
Destination airport name Chicago O’Hare International Airport
City Chicago, IL
Country the United States
Latitude 42
Longitude -87.9


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.