Southwest has begun interlining with Philippine Airlines. It is Southwest's fourth interline partnership this year, joining Icelandair and Taiwanese carriers Eva Air and China Airlines.
The interline agreement facilitates connections between the Southwest and Philippine networks via Honolulu, Seattle, San Francisco and Los Angeles. Philippine serves those cities from its hub in Manila.
Single-itinerary bookings are now available through direct Philippine Airlines and third-party channels, including GDSs. They are not available via Southwest channels.
Southwest said that the arrangement has opened dozens of new travel options across the Pacific.