Regarding your query below, We would like to inform you that The early check in on the morning, if subject to our room availability when you arrive at our hotel (Free of Charge) but if it's not in this case you might pay for the early check in charge. And our hotel place is far from Hua Lam Pong - Main Train station about 20 minutes by driving on the good trafics.

You can get the receptionist to book a cab to the airport. If you need a bigger cab because of luggage,it's 500 baht including the 2 tolls(use the highway where traffic flows smoother). Alternatively, call your own cab or use grab car( similar to uber) which cost about 300 bahts excluding the tolls. Since yours is an early flight, BTS might be a better option