#1 will nokair let me fly into Don Mueang without a round trip or flight reservation on to  USA?

 

#2 Will IM at Don Meuang let me in?  I don't plan to stay more than two weeks but wanted to keep things flexible., 

1. They could ask for a ticket out of the country within 30 days unless you have a valid visa for entry. But it can be a one way ticket to anywhere.

2. You should not a have a problem unless you have a history of many visa exempt or tourist visa entries.

1. The airline might insist on an onward flight if you are traveling without a visa.

 

2. Unless you’re a visa running long term tourist you should have no problem entering the country without an onward flight.

I have been to Thailand for 59 days Dec 17'-18 at start of year, April 2 weeks, July, 2 weeks.   I just use visa on entry.