Southwest Airlines Teams Up with Singapore Airlines for Interline Partnership

The SIA Group, which encompasses Singapore Airlines and its low-cost subsidiary Scoot, operates flights to more than 35 countries and territories. Southwest Airlines will serve as a connector for international travelers arriving in the U.S. at three major airports: Los Angeles (LAX), Seattle/Tacoma (SEA), and San Francisco (SFO). From these gateway locations, passengers can seamlessly connect to nearly 120 destinations within the expansive Southwest network.

Andrew Watterson, Chief Operating Officer of Southwest Airlines, emphasized the significance of this partnership, stating, "Singapore Airlines becomes the eighth carrier in our partnership portfolio exemplified by its quality and reach." He added that this collaboration not only broadens geographic access but also enhances the customer experience, stating, "Journeys that pair Southwest and Singapore Airlines not only connect new geographies but also create consistent high-quality Customer experiences."

As part of its commitment to improving passenger experiences, Southwest Airlines has introduced several enhancements in 2026, including assigned seating, optional Extra Legroom, and enhanced boarding processes. These upgrades are designed to provide greater comfort and choice for travelers, showcasing the airline's renowned hospitality.

Travelers opting for Extra Legroom seats will enjoy additional perks such as premium snacks and complimentary drinks, reinforcing Southwest's dedication to customer satisfaction. The airline’s continuous improvements are aimed at ensuring that passengers enjoy a seamless and enjoyable journey.

In addition to this partnership, Southwest Airlines has expanded its service to five new airports in 2026, including St. Thomas in the U.S. Virgin Islands, Sint Maarten, Santa Rosa/Sonoma County in California, Knoxville in Tennessee, and Anchorage in Alaska. This growth reflects the airline's commitment to increasing its footprint and offering more travel options for its customers.

With the addition of Singapore Airlines, Southwest now boasts eight active partnerships with various international carriers. These alliances facilitate travel between Southwest's network and key destinations across Asia, Europe, the Middle East, and Africa, further solidifying the airline's position as a global travel leader.

Founded in 1971, Southwest Airlines has grown to become one of the world's most admired airlines, known for its value and hospitality. Operating at 122 airports across 12 countries, Southwest has earned a reputation for democratizing air travel, carrying more passengers flying nonstop within the United States than any other airline. In 2025, the airline served over 134 million customers, highlighting its passionate loyalty and commitment to service.

As Southwest Airlines continues to innovate and expand its offerings, the partnership with Singapore Airlines marks a significant milestone in its strategy to enhance global connectivity and provide exceptional travel experiences for its customers.