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American Airlines and Porter Airlines are seeking to establish a codeshare partnership to enhance connectivity between Canada and the United States. The airlines applied to the US Department of Transportation on July 25, 2025, for approval to implement reciprocal blanket codeshare services.
The proposed agreement would provide American Airlines with a strong Canadian partner, allowing it to compete more effectively with other transborder alliances such as Air Canada with United Airlines and Delta Air Lines with WestJet.
Once approved, Porter Airlines would benefit by expanding its access to the US market. The application published on the DOT website outlines specific routes that may be included in the codeshare agreement. Porter would operate flights connecting Toronto Pearson (YYZ), Ottawa (YOW), Halifax (YHZ), and Montreal (YUL) to any Canadian airport served by Porter. Additionally, routes between these cities and any US airport served by Porter would be covered, excluding Boston (BOS), Newark (EWR), Washington Dulles (IAD), and Chicago Midway (MDW).
