Lufthansa has yet to decide where to deploy the additional Bombardier CRJ900s which the carrier has newly ordered.
The airline is taking another eight aircraft over the first half of 2011.
Its CityLine and Eurowings divisions currently use the CRJ900 but a spokesman for Lufthansa says there are "various factors" to consider regarding their operation and the airline is "not 100%" on its plans for deployment.
As part of its cost-saving measures Lufthansa is reducing the number of 50-seat aircraft in its fleet.
Lufthansa deputy chairman Christoph Franz says that the airline is taking 40 aircraft in this sector out of its fleet.
He says the phase-out will be completed in summer 2011 but that "more than 50%" has already been achieved.
Introduction of the CRJ900s, says the spokesman, will amount to "restoring certain capacity" lost through the 50-seat reduction but with "fewer aircraft in the regional fleet".