Interestingly enough, my wife and I traveled together to Thailand. We had tickets leaving Thailand to Vietnam 57 days later. I made it through Delta check in no problem. My wife on the other hand was asked to prove she had an exit ticket prior to 60 days. So, I got through without being asked, she didn't. It's a crap shoot. You should have one just in case. Get refundable tickets somewhere cheap then cancel them once you're in country.
