Hi,

Tomorrow I am flying to Hamburg from Sofia, with a transfer in Vienna - with Niki and Air Berlin (single ticket).
My flight from Sofia is scheduled to arrive in 07:40, and the boarding to Hamburg starts in 07:50, with a departure in 08:35.

I am afraid that with the expected snow tomorrow in Sofia, my flight to Vienna could be delayed. In that case, do you know if Air Berlin will wait for me for a reasonable time, or just rebook me for the next flight?
How much time would I need for the transfer in Vienna? (I must pass through the passport control since arriving from a non-Shenguen country.)