Summer Holiday and Welcome Back Sunday

Sønderborg International School is closed for the Summer Holidays in the weeks 27, 28, 29 and 30.

The administration team is back on Monday, 2nd August, where you can reach us at or phone +45 74 43 01 10.

We wish you all a nice Summer Holiday and we are looking forward seeing you all again – and not least, to welcome all our new students and families to SIS.

Stay safe and see you at the PTC BBQ event on the first day of school, Sunday 8th August 2021.