American Airlines is trimming its cross-border network in the U.S. Southwest, confirming plans to discontinue its Phoenix–Monterrey service in early December 2026. The final flight is scheduled to operate on 1 December 2026, ending a daily link between Arizona's largest hub and the industrial city of Monterrey in northern Mexico.
The route is currently flown on behalf of American Eagle by regional partner Envoy Air, using the Embraer E175. American schedules the service on a daily basis under flight number AA3399, with the outbound leg departing Phoenix in the early afternoon and a return operating in the evening.
Phoenix Sky Harbor is one of American's principal western hubs, feeding connecting traffic across the United States and into Mexico. Monterrey, a major business and manufacturing center, has long been served from several U.S. gateways, but individual routes are regularly reviewed as carriers balance aircraft availability, demand, and the profitability of thinner cross-border markets.
The Embraer E175 is a workhorse of the U.S. regional fleet, and American operates a large number of the type through its regional affiliates under the American Eagle brand. With 76 seats in a two-class layout, the E175 is well suited to markets that cannot support a full mainline narrowbody but still warrant a comfortable, dual-cabin product. When a route's economics no longer justify a daily frequency, redeploying those regional jets elsewhere is a straightforward lever for the airline.
Discontinuing Phoenix–Monterrey does not necessarily signal a retreat from the wider market. Carriers frequently prune specific city pairs while maintaining or growing service on parallel routes, and travelers between the two metropolitan areas will still be able to connect through other American hubs or on competing airlines. Route adjustments of this kind are a normal part of seasonal and annual network planning.
Cross-border regional flying between the United States and Mexico has seen shifting fortunes in recent years, shaped by demand patterns, currency movements, and competition from both U.S. and Mexican carriers. Against that backdrop, American has continued to refine where it deploys its regional capacity, concentrating aircraft on the routes that deliver the strongest returns.
For Phoenix, the loss of the Monterrey service is a modest change to a broad international map that still includes numerous destinations in Mexico and beyond. For Monterrey, it removes one of several U.S. options while leaving the city well connected to the American network through other gateways.
American has listed 1 December 2026 as the last day of operation for the route. As with any schedule filing, the airline could revisit the decision if market conditions change, but for now the Phoenix–Monterrey pairing is set to leave the timetable at the start of December.
Sources: AeroRoutes. Featured image: AI-generated by AviationShop. By James Holloway.
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