Southwest Airlines Deepens Asia Reach with New Partnership with South Korea's Air Premia

Southwest Airlines has strengthened its international footprint by adding South Korea’s Air Premia as its newest interline partner, continuing a trend of expanding its global presence without initiating its own long-haul service. This latest alliance connects Southwest's broad domestic network with Air Premia's transpacific operations through strategic US gateways including Honolulu, Los Angeles, and San Francisco. Customers can now book tickets through Air Premia, travel agents, and various online platforms, streamlining travel between the two carriers.

Air Premia, headquartered at Incheon International Airport near Seoul, operates a fleet centered on Boeing 787-9 aircraft deployed on multiple international routes. Its US network reaches several leading cities including Los Angeles, New York, San Francisco, Honolulu, and Washington, D.C., alongside destinations across Asia. The partnership allows Southwest customers seamless access to Air Premia’s transpacific flights and extends Air Premia’s reach into Southwest’s extensive domestic US cities.

This agreement marks Southwest's ninth international partnership since it launched its first with Icelandair in February 2025, a significant acceleration in the airline’s global partner portfolio. Alongside Icelandair, Southwest now collaborates with China Airlines, EVA Air, Philippine Airlines, Condor, Turkish Airlines, All Nippon Airways, Singapore Airlines, and Air Premia. These alliances are designed to provide Southwest passengers with a vastly expanded range of international destinations while connecting foreign carriers to Southwest’s robust domestic route network.

Southwest’s strategy centers on leveraging partnerships as a cost-effective alternative to building its own long-haul operations. Traditionally focused on a point-to-point domestic business model with limited short-haul international flying, the airline is now embracing a global partnership approach that uses gateway hubs to link broader markets. This model offers increased connectivity to Europe, Asia, and beyond, facilitating smooth transfers through major airports.

Andrew Watterson, Southwest Airlines Chief Operating Officer, emphasized the synergy between the carriers, highlighting that both airlines prioritize value, comfort, and high-quality service onboard. He noted that Air Premia’s inclusion expands travel options for Southwest customers globally and introduces more international markets to Southwest’s vast US network and reputed hospitality.

From Air Premia’s perspective, the partnership unlocks access to over 120 destinations within Southwest’s network on a single ticket. This connectivity is particularly valuable for South Korean travelers aiming to reach US cities that lack nonstop service, including secondary but significant markets like Las Vegas, Chicago, Houston, Phoenix, Denver, Portland, and Nashville. These connections represent important secondary nodes beyond the main coastal gateways, broadening traveler choices.

The Air Premia deal is part of a broader transformation underway at Southwest, which also encompasses several strategic initiatives. In its 2025 corporate results, Southwest highlighted six strategic partnerships alongside revenue-driven changes such as implementing assigned seating, introducing extra-legroom seating options, adjusting fare products, and expanding online distribution channels. These efforts collectively indicate Southwest’s intent to diversify and deepen its market access through a mixture of partnerships and product innovation.