Generally, check-in times require guests to arrive at the airport a minimum of two hours before a domestic flight and three hours for international flights. This allows you plenty of time to check in and pass through security to the boarding area. Online check-in means you can save time and fuss at the airport by checking in for your flight via the website prior to your arrival at the airport.
Please allow enough time to get to your flight - be aware that during busy travel periods or at airports with heightened security you may experience longer queues. Boarding usually starts 30-45 minutes before departure and the gate generally closes 20 minutes prior to departure. Check with your airline to see what time check-in counters open.