Southwest Links With Singapore Airlines to Reach More US Cities

Southwest Airlines and Singapore Airlines launched a new interline partnership, making it easier for travelers to connect between Singapore Airlines’ international flights and Southwest’s US network.

The first shared airports are Los Angeles, San Francisco, and Seattle/Tacoma. These West Coast gateways are important connection points between Asia and North America. From there, passengers can continue on Southwest to nearly 120 US airports.

The tickets are available through Singapore Airlines, travel advisors, and travel websites. They are not currently sold through Southwest’s own website or app.

What the deal changes for travelers

The partnership lets passengers book one itinerary that includes flights on both airlines. This is useful for travelers flying from Singapore or other international markets into the US and then continuing to another city on Southwest.

Without this type of agreement, passengers often need to buy separate tickets for the long-haul and domestic parts of the trip. A single itinerary makes planning easier and can create a smoother connection process.

The deal is especially helpful for cities that Singapore Airlines does not serve directly. Travelers can arrive at a major gateway and then continue deeper into the US on Southwest.

Southwest uses partnerships to reach long-haul travelers

Southwest is best known as a major US domestic airline. It also flies to nearby international leisure markets, but it does not operate long-haul flights to Asia or Europe.

Interline partnerships give Southwest another way to reach international travelers without launching its own long-haul routes. Singapore Airlines is now Southwest’s eighth overseas partner, joining airlines such as Turkish Airlines, Icelandair, All Nippon Airways, Condor, EVA Air, China Airlines, and Philippine Airlines.

For Singapore Airlines, the benefit is also clear. It can offer more US destinations without operating domestic flights inside the country.

Southwest’s global push goes beyond domestic flying

The partnership also comes as Southwest continues to reshape its business. The airline is moving beyond its old low-cost, domestic-only image by adding new revenue tools, seating changes, and international partners. Southwest entered 2026 with stronger revenue expectations and a bigger focus on premium seating and operational efficiency. The Singapore Airlines agreement shows that Southwest is looking for growth not only inside the US, but also through global travel connections.

Photo by Nick van der Vegt on Unsplash