American Airlines (Dallas/Fort Worth) and WestJet Airlines (Calgary) announced they have entered into an interline agreement. The interline agreement means American Airlines customers traveling to Canada and transferring to a WestJet flight can purchase a single ticket and check bags through to the final destination.

The agreement provides American’s customers seamless connecting service to 25 new Canadian cities not currently served by American or American Eagle. WestJet serves a total of 31 Canadian cities and 71 destinations in 13 countries.

The connections will first be available through the six gateways in Canada currently served by American or American Eagle – Toronto, Montreal, Calgary, Vancouver, Halifax and Ottawa. American and WestJet expect to implement a second phase of their interline relationship in December that will add additional connecting opportunities through WestJet’s nonstop U.S. flights to Canadian cities.

The companies also said they are exploring other ways to enhance customer benefits through other commercial cooperation agreements.