“We currently have a market share of around four percent in Germany, in the next three to four years we'll be working towards an increase to 15 to 20 percent”, O'Leary told financial newspaper Handelsblatt.
O'Leary added that he isn't worried about Lufthansa's move into his no-frills territory.
“Some engineers and doctors get together in Frankfurt and decide around a green table that they'll found a low-cost airline. That's just not enough”.
He claimed that Germanwings and the newly-founded Eurowings shared similar high-cost structures with their parent company, despite Lufthansa boss Carsten Spohr's promise that Eurowings would offer 40 percent cheaper prices.
O'Leary also promised that Ryanair would be serving larger airports closer to Germany's biggest cities in future.
“We're currently in talks with eight German airports, four or five of them are large airports, which aren't currently in our network”, he said, adding that he hoped to attract more business travellers with the new routes.
SEE ALSO: 7 hour flight become 40 hours of hell