TORONTO — Porter Airlines is adding Pittsburgh to its route network this fall, making it the airline’s 22nd city served.

Flights begin Sept. 21 with up to two daily roundtrips between Billy Bishop Toronto City Airport and Pittsburgh International Airport. The schedule features weekday departures from Toronto at 8:25 a.m. and 3:05 p.m. Pittsburgh departures are at 10:05 a.m. and 4:45 p.m. A detailed schedule is available at flyporter.com, with flights now available for booking.

Porter is the fourth carrier to announce the start of service at Pittsburgh International Airport within the past 12 months.

Pittsburgh has been named one of ‘The 15 Most Livable Cities in The US’ by Forbes Magazine and The Economist.

Introductory roundtrip fares departing from Toronto start at $321 including all fees and taxes.

Porter Escapes vacation packages will be available at porterescapes.com in the coming weeks.