We booked in April 2017 for a flight Feb 22 2018. By Chance I decided to look at the flight schedule 2/14 and found it had change by 2 hours so we would not make the connection. I got Insel to change us but given the late arrive in BON would not get hotel to get us. So I tried to cancel only to find they sent me a clause:
9.2 CANCELLATION AND DELAYS
9.2.1 InselAir will take all necessary measures to avoid delay in carrying you and your baggage but times shown on timetables or elsewhere are not guaranteed and form no part of the agreement. InselAir may at its own discretion, with or without notice and in order to prevent a flight cancellation, substitute alternate carriers or aircraft and if necessary may alter, add or omit stopping places shown on the ticket or itinerary. Schedules are subject to change without notice. InselAir is not responsible for or liable for failure to make connections or to operate any flight according to schedule or for a change to the schedule of any flight. Under no circumstances shall InselAir be liable for any special, incidental or consequential damages arising from the foregoing.
I did not read the contract of carriage, no 1 does. Anyway no refund.