Singapore Airlines and Southwest Airlines have entered into a new interline agreement, announced in June 2026, aimed at expanding travel options for passengers in the United States. This partnership is designed to facilitate easier booking and coordination of connecting flights across the two carriers.
Increased Flight Connectivity and Booking Convenience
The interline arrangement provides U.S. travelers with improved access to a broader range of destinations by linking Singapore Airlines’ international services with Southwest’s domestic network. With this agreement, passengers will be able to book itineraries involving both airlines within a single reservation, streamlining the travel process and enhancing connectivity between routes served by the two companies.
