Overview
- The carriers announced the interline agreement on Monday, June 8, at the IATA Annual General Meeting in Rio de Janeiro.
- Customers can book combined Singapore Airlines and Southwest itineraries through SIA, travel agents, and booking sites with a single ticket and through‑checked baggage.
- Connections run via Los Angeles (LAX), Seattle‑Tacoma (SEA) and San Francisco (SFO) and link Changi with almost 120 Southwest domestic airports.
- The pact is an interline agreement rather than a codeshare, so it does not include schedule or inventory integration or reciprocal frequent‑flyer earning and redemption.
- The deal furthers Southwest’s strategy to grow international feed without long‑haul aircraft and brings its interline partner count to eight, though analysts say the practical gains are smaller than those from full alliance ties.