I just booked a flight on Sterling for the day my passport will expire - yes, I checked that date before - and I'd like to book another flight on the same airline for a later date; if else I'll be taking the train home.
The Sterling website says you need a valid passport for checking in, however I won't be spending 60 Euros on a passport just to take a 60 Euro flight. Since Germans have national ID cards that are just as valid for ID purposes as passports, I'd like to know if this ID card is also valid for check-in at CPH.
Their website hasn't been that useful of a resource, so I'll appreciate all info I can get.
Thanks for your attention!