Copa Airlines does not allow you to check your bags more than four hours before your flight’s scheduled departure.
Before you travel, keep these two baggage check-in guidelines in mind:
Baggage check-in starts 4 hours before departure
Overnight layovers of 24 hours or more
If your itinerary includes an overnight layover of 24 hours or more, you must collect your bags at customs and check them in again at your connecting airport.