The cheapest times to fly from REP to SAN are

  • October 22nd to March 25th (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 SAN is mid February. Prices can be as high as $7347 for Friday flights during late July, or as low as $934 for Tuesday flights around mid February.


When to Fly to San Diego

Flying from Siem Reap (REP) to San Diego, CA (SAN) will usually cost between $1029 to $5540 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid February with an average ticket price of $1048. Due to high demand the most expensive time to fly is late July, with an average price of $3675. Planning your trip to low-cost times can easily save you $2626 on economy flights and even more on first-class flights. Generally, any price below $1426 can be considered a good price for a round-trip REP to SAN flight.

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

REP to SAN Flight Prices

Compared to other flights, the REP to SAN flight is slightly more expensive than the average and costs slightly more than the average flight leaving from Krong Siem Reap. The average price per mile (for a direct flight) is $0.11, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to SAN, and Sunday the cheapest day to fly back into REP. Fridays are the most expensive days to fly to San Diego, and Mondays are the most expensive days to return to Krong Siem Reap. Selecting flights on the least expensive days could save you up to $1429 (48%) 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 $1340. Return trip prices are from the SAN 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 SAN can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 15 hour 50 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 REP to SAN while comparing.

Destination alternative #1: Los Angeles International Airport (LAX) in Los Angeles, CA

  • 109 miles (175 km) away from SAN
  • Usually 38.78% less expensive than SAN
  • 1-layover flights available

See REP to LAX flights


Flight Hacking REP to SAN

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 SAN — but Champion Traveler does!

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

  • Price for both tickets: $963
  • Average savings: $464 (32.5%)

See REP to SFO flights

Hack #2: San Francisco, CA (REP > SFO > SAN)

  • Price for both tickets: $1043
  • Average savings: $383 (26.86%)

See REP to HKG flights

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

  • Price for both tickets: $1052
  • Average savings: $374 (26.23%)

See REP to LAX flights


Flight Questions Answered

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

Which airlines fly this route?

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

How far away is it from San Diego International Airport to Siem Reap International Airport?

The distance between the two airports is roughly 8254 miles or 13283 kilometers.

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

The real-world flight time for a nonstop REP to SAN flight is about 15 hour 50 minutes.

How many flights go between Siem Reap and San Diego, CA?

It depends on the day of the week and the date, but a typical day might have around 6 available flights from REP to SAN.


Airport Location Info


Departing Airport

Origination codeREP
Origination airport nameSiem Reap International Airport
CitySiem Reap

Return Airport

Destination codeSAN
Destination airport nameSan Diego International Airport
CitySan Diego, CA
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.