The partnership will allow each airline's customers to earn miles on their respective flights, while providing AA customers connections in up to 20 new Canadian cities not served by AA or American Eagle.
WestJet customers will be able to fly on American from Canada to Chicago and Boston, with expanded service throughout the American Airlines network expected in the near future, American said in a news release issued Monday.
"Our codeshare with WestJet will further expand our North American network and provide our customers seamless connections to and from cities throughout Canada," said Virasb Vahidi, American's Chief Commercial Officer. "As a valuable result of NAFTA economic integration and the open skies aviation agreement between Canada and the United States, Canada has become an ever more important business and leisure destination for travelers from the U.S."
The codeshare agreement must still obtain regulatory approval.