The country's leading private sector airline Jet Airways today said that it plans to ramp up its international flight connections from five more cities - Hyderabad, Kolkata, Ahmedabad, Amrtisar and Bangalore - to connect with Brussels in Europe.Jet Airways chairman Naresh Goyal said that it plans to add three more flights to the United States - San Francisco, Los Angeles and Washington DC - using its new planes from February 2008 onwards."We expect our revenues to double to $3 billion from $1.4 billion over the next three years," Goyal said.