You can fly from Vienna (VIE) to Addis Ababa (ADD) for 526€.
However, flying from Vienna (VIE) to Cape Town (CPT) connecting through Addis Ababa (ADD) is only 419€.
So when flying to ADD, it is cheaper to book a flight to Cape Town and not take the connection than to book a flight directly to ADD.
As you can see in the pictures, the 419€ VIE-CPT flights even include the exact 526€ VIE-ADD flight.
