Actually, I'm the one booking the flights and they're just an "on the ground" tour company. I'm looking to book a Korean Air flight leaving Siem Reap at 11:30 pm and arriving at ICN at 6:40am, with a 4 hour layover before I board a 10:40 flight to JFK. This is all on Korean Air. Since it's the same airline, I assume that if there's a delay, I'll be taken care of... I was just wondering if anyone has ever experienced significant delays leaving Siem Reap and if a buffer day is indeed warranted. I'm guessing that my tour company is just being super cautious or is operating on outdated info...