Usually, check-in counters open 2 hours prior to departure international flight.
Always verify the check-in time with your airline. This can be diiferent from one company to another.
Please have your ticket, or your electronic boarding card if you have already registered online, and your identity documents valid.
Check with your airline the weight and size of your luggage allowed in the cabin and in the hold.
Make sure you do not bring prohibited items into your luggage.
Have a nice trip !