The short answer
Plan to arrive at Kutaisi Airport at least 2 hours before a domestic flight and 3 hours before an international one — the general guidance most airlines and the airport itself recommend.
Check-in windows are tighter than you might expect
Check-in typically opens only 2 hours before departure, and closes about 1 hour before domestic flights or 1.5 hours before longer international ones. Arriving too early won't get you through check-in any faster.
The one rule that catches people out
If you're flying Wizz Air out of Kutaisi, you must check in at the airport desk in person — a PDF or digital boarding pass on your phone isn't accepted at security. Without a physical boarding pass issued by staff, you won't be allowed through to the airside area, so build in enough time for the check-in queue.
What the terminal itself is like
Kutaisi's terminal is compact — one duty-free shop, two coffee shops, and a single concourse with 7 gates — so once you're through security there isn't much to fill idle time with. That's one more reason not to cut your arrival time too close.
