Singapore Airlines (SIA) and Southwest Airlines announced an interline partnership on June 8, 2026, allowing passengers to book combined itineraries between Singapore and nearly 120 US destinations on a single ticket [1, 2, 3].
The partnership enables SIA passengers to connect with Southwest's extensive network via three US gateway airports: Los Angeles International Airport, Seattle-Tacoma International Airport, and San Francisco International Airport [1, 2, 3]. Travelers can book these combined itineraries through Singapore Airlines’ website, travel agents, and other online platforms [1, 2, 3].
Under the agreement, passengers will experience seamless check-in across all flights in their itinerary. Baggage will be transferred directly between airlines without the need to re-check at the connecting airports [1, 3].
Singapore Airlines becomes the eighth airline to enter an interline partnership with Southwest, joining carriers such as All Nippon Airways (ANA), China Airlines, EVA Air, Philippine Airlines, Turkish Airlines, and Icelandair [1, 3]. This expands Southwest’s interline portfolio and strengthens connectivity between Asia and the US [1, 2, 3].
Southwest Airlines officially announced the partnership in a press release on June 8, 2026 [1, 2, 3]. The collaboration opens new travel opportunities by linking Singapore’s major international hub to a wide array of US cities through Southwest's local networks.
Passengers now benefit from increased convenience and itinerary flexibility across nearly 120 US airports with three key gateway points, enhancing transpacific travel options [1, 2, 3].
