You can check in 36 hours prior to your departure for all Finnair-operated flights departing from Finland, and most Finnair flights departing from abroad. For flights to/from the USA, check-in opens 24 hours before departure.
Start check-in with your family name and booking reference or e-ticket number. Check the booking reference or e-ticket number from your e-ticket itinerary. Enter your 6 digit booking reference (for example Y2KP3D) and family name exactly as it is on your ticket.
Please note that you might need to enter passport details during the check-in process.