Phnom Penh city to Krong Siem Reap is 314Km so it may take 6 hours to drive You can choose your departure time from Phnom Penh between 07:30 am and 02:30 pm to make your trip smooth please provide us your clear pick-up and drop-off location address our English speaking driver will pick you up from your place on time then transfer to Krong Siem Reap on the way we may stop at Skuon market (Spiderville) for toilet break second stop is kampong kdei bridge used to be the longest corbeled stone-arch bridge in the world, with more than twenty narrow arches spanning (87m) The bridge was built in the 12th century during the reign of king Jayavarman 7 then this is the second stop is if you like then head to Krong Siem Reap. please note that because this place is on the way you can stop without any additional if you like but if you just want to be in Siem Reap fast just forget it.