American Airlines operates more daily departures at Pittsburgh International Airport than any other carrier, and in September, they’ll be offering more.

Highlights include a 50 percent increase in frequency and capacity on flights to Miami from PIT, with three daily flights to Miami International Airport. Additionally, flights to Reagan National Airport in Washington, D.C., will increase to five weekday trips with the addition of a noon departure from PIT.

These schedule adjustments, which were spurred by aircraft availability, occur in September. Other increases in seat capacity or frequency include service from PIT to LaGuardia in New York, Chicago-O’Hare, Charlotte and Dallas/Ft. Worth.

Vice President of Air Service Development Bryan Dietz noted that growth in routes to New York and D.C. is associated with increased demand from business travelers, and growing demand to Caribbean destinations through American’s strong Miami hub could be a cause for additional capacity on the Miami route.  These route additions come ahead of American increasing their daily flights to New York JFK from 1 daily flight to 4 daily flights starting November 21st and join ongoing route investments with their oneworld alliance partners at British Airways with year-round service to London Heathrow.

American officials said the changes were a seasonal adjustment.