If you have electronic tickets (e-tickets) and the airline offers the service of online check-in, choosing from the list of the airline you wish , take you to the website you check-in online and print your boarding pass. Usually 24 or 48 hours before your scheduled flight . Some airlines allow you to send your boarding pass and on your mobile device.
Note: If your flight is operated by another airline or route has two or more airlines , you may be asked to check-in at the airport.
Choose the airline and click the button to start the online check-in: