Hello, Travelers departing from Lufthansa Airlines Washington Office may check in at airport check-in counters or online 23 hours before their departure. In order to give yourself enough time for security checks and luggage drop-off on international flights, it is advised to arrive at least three hours before departure. Self-service kiosks are another option for faster passenger check-in. Don't forget to prepare your passport and other required travel documents in advance for confirmation.