Southwest Airlines has announced a new interline partnership with Philippine Airlines, marking its fourth interline agreement of 2025. The collaboration expands Southwest’s transpacific reach and offers travelers more seamless travel options between the United States and Asia.
The new interline agreement enables single-itinerary bookings across both carriers’ networks via Honolulu, Seattle, San Francisco, and Los Angeles, all of which are served by Philippine Airlines from its Manila hub.
Customers can now purchase single tickets that include both airlines’ flights through Philippine Airlines’ sales channels and major global distribution systems (GDSs), though these bookings are not yet available through Southwest’s own channels.
This partnership opens dozens of new travel combinations across the Pacific, further strengthening Southwest’s growing portfolio of international connections following recent deals with Icelandair, EVA Air, and China Airlines.
