Singapore Airlines Becomes Southwest Airlines Eighth International Partner

Southwest Airlines and Singapore Airlines have announced a new interline partnership that will allow travelers to book seamless journeys between Singapore Airlines’ global network and Southwest’s extensive US route map on a single ticket. The agreement was unveiled during the International Air Transport Association (IATA) Annual General Meeting in Brazil and marks a significant milestone for Southwest as it continues expanding its international connectivity through strategic airline partnerships.

Under the new arrangement, passengers traveling on Singapore Airlines can now connect conveniently to nearly 120 destinations across the Southwest Airlines network through three shared gateway airports:

• Los Angeles International Airport (LAX)
• San Francisco International Airport (SFO)
• Seattle-Tacoma International Airport (SEA)

Singapore Airlines operates nonstop service from its hub at Singapore Changi Airport (SIN) to all three US gateways, creating a streamlined travel experience for customers flying between Asia and destinations throughout the United States. Tickets are now available through Singapore Airlines, travel agents, and online travel booking platforms.

The partnership gives Southwest customers easier access to Singapore Airlines’ extensive international network, while international travelers gain convenient access to Southwest’s domestic footprint. The Singapore Airlines Group, which includes both Singapore Airlines and Scoot, serves more than 130 destinations across 35 countries and territories worldwide.

With the addition of Singapore Airlines, Southwest now maintains eight active partnerships with international carriers, connecting its network to destinations across Asia, Europe, the Middle East, and Africa. Other airlines include ANA, China Airlines, Condor, EVA Air, Icelandair, Philippine Airlines, and Turkish Airlines.

The new partnership comes during a period of significant growth for Southwest Airlines.

In 2026, the carrier launched service to five new destinations:

• Ted Stevens Anchorage International Airport (ANC)
• Knoxville’s McGhee Tyson Airport (TYS)
• Santa Rosa’s Charles M. Schulz–Sonoma County Airport (STS)
• St. Thomas’ Cyril E. King Airport (STT)
• Sint Maarten’s Princess Juliana International Airport (SXM)

The airline has also been introducing customer-focused enhancements, including assigned seating, optional Extra Legroom seating, and enhanced boarding procedures, all aimed at improving the travel experience while maintaining Southwest’s signature hospitality. For decades, Southwest focused almost exclusively on domestic flying, but the carrier has increasingly embraced partnerships that allow customers to travel beyond its own network.

Andrew Watterson, Southwest Airlines Chief Operating Officer, said:

Singapore Airlines becomes the eighth carrier in our partnership portfolio exemplified by its quality and reach. These carriers are facilitating access to our network for a growing global audience drawn to our improved onboard product and increasingly choosing to fly with us. Journeys that pair Southwest and Singapore Airlines not only connect new geographies but also create consistent high-quality Customer experiences.”

Anthony’s Take: As global travel demand continues to grow, the new partnership strengthens Southwest’s position in the international marketplace while offering travelers more choice, convenience, and connectivity than ever before. While these interline agreements do not offer benefits, they do help to simplify travel for many passengers.

(Image Credits: Southwest Airlines and Singapore Airlines.)