Yes, passengers can check in online for flights operated by Czech Airlines. Online check-in typically opens 24 hours before the scheduled departure time and remains available until 1 hour prior to departure for most flights. This service allows travelers to select their seats, obtain a boarding pass, and save time at the airport, especially for those who may not be checking luggage. To utilize the online check-in, passengers should visit the official Czech Airlines website, where they can enter their booking details to access their flight information. It is advisable for travelers to have their confirmation number or ticket number ready to streamline the process. For additional assistance and the most accurate information regarding check-in procedures, it would be beneficial to refer to the current web page dedicated to check-in services on the official Czech Airlines site.