Low cost airline carrier Ryanair has cancelled its regular flights between the second largest Bulgarian city of Plovdiv and Milano.

Ryanair will not launch regular flights from Plovdiv to Frankfurt as it was initially announced, either, Plovdiv Airport's CEO Doychin Angelov told the Bulgarian Darik radio.

"I received an unofficial e-mail an hour ago, I expect the official confirmation tomorrow, " Angelov explained.

"I hope they at least keep the regular flights to Germany, since this destination attracts a lot of interest," he added.

The routes have been dropped due to the Plovdiv's municipality's failure to pay a tax worth BGN 180 000 to the Plovdiv Airport's development fund, according to Angelov.

Ryaniar's first flight from Milano to Plovdiv was carried out on May 7 2011. The company will carry out regular twice-weekly flights from Milan Bergano to the Bulgarian airport.

Plovdiv had become attractive for air companies as of April 1, 2010, when its fees were sharply reduced to three times lower that the fees at the airport in the capital Sofia.