TORONTO — Porter Airlines and American Airlines are reportedly working towards a codeshare agreement.

According to airline industry news sources the airlines filed an application with the U.S. Department of Transportation, seeking permission to add Porter to its roster of codeshare partners.

Porter’s current codeshare partners include Air Transat and Alaska Airlines.

Porter’s competitors Air Canada and WestJet have long-established ties to U.S. carriers.

Air Canada upped its long-time partnership with United Airlines in recent years, signing a next-level joint business agreement with its fellow Star Alliance member in 2022. Building on the airlines’ long-standing alliance, the agreement allows customers to connect to dozens of codeshare destinations in the U.S. and more than a half dozen Canadian cities, plus reap the benefits of the carriers’ MileagePlus and Aeroplan loyalty programs.

WestJet meanwhile has had a joint venture agreement with Delta Air Lines since 2020. In May 2025 Onex announced plans to sell a 25% stake in WestJet to Korean Air and Delta Air Lines, pending regulatory approval.

As noted by SimpleFlying.com, Porter currently operates flights into 16 destinations in the U.S.. A codeshare deal between the two airlines would open up American’s Dallas / Fort Worth and Miami hubs to Porter passengers and expand Porter’s reach in the U.S. Codesharing on Porter’s flights meanwhile would give American Airlines more connectivity in Canada, particularly in Toronto, Ottawa, Montreal and Halifax.