Air Berlin, the German airline partly owned by Gulf carrier Etihad, said passenger numbers fell 4.3 percent in April, although it was able fill more seats on its planes in the month.
Germany's second largest airline after Lufthansa carried 2.66 million passengers in April. Its load factor climbed 2 percentage points to 78.0 percent, while the number of seats it offered fell 6.7 percent.
Air Berlin has been trying to shrink itself back to profitability by cutting routes, seats and delaying plane orders.
