You have to chec-in for Alsie Express at the counter in Sonderborg Airports terminal.
If you are travelling from Sønderborg to Copenhagen, you will need to check-in 15 minutes before departure at the lastest.
if you wish to bring a baby carriage, bicycle or another similar baggage size you will need to check-in 45 minutes before departure at the latest.
Check – in in Copenhagen
If you are traveling with Alsie Express from the Copenhagen Airport, it is necessary to check in at least 30 minutes before departure. Check-in is possible in terminal 3 at the self-service kiosk or at the counter. The luggage needs to be checked-in in terminal 3 as well.
If you have a different flight out of the Copenhagen Airport, the time of the check-in depends on your airline and where your final destination is.