IMPERIAL — American Airlines is cutting flights from Pittsburgh International Airport to St. Louis and Hartford, Conn., starting in November.

Allegheny County Airport Authority spokesman Bobby Kerlik said the airport is hoping to find another carrier to serve those markets. The flights to Bradley International Airport in Hartford stop Nov. 4, and the Lambert-St. Louis International Airport flights will end Nov. 3.

Kerlik said a national pilot shortage is to blame.

Trans States, a regional carrier, operated the flights under the American Airlines banner.

Trans States spokesman Stacey Ross said the airline looked at “all of our American routes to determine which ones would have the least overall impact on American’s system if they were discontinued.”

American is Pittsburgh’s largest carrier.