Southwest Airlines Co. and Singapore Airlines (SIA) have partnered to offer single-ticket journeys connecting the United States to global destinations. The interline agreement, announced during the International Air Transport Association (IATA) Annual General Meeting in Rio de Janeiro on June 8, 2026, allows travelers to book seamless connections between the two carriers' networks.

The SIA Group, which includes Singapore Airlines and Scoot, operates service to more than 130 destinations in 35 countries and territories. It flies between its global hub, Singapore Changi Airport, and three US airports served by Southwest: Los Angeles (LAX), Seattle/Tacoma (SEA), and San Francisco (SFO). At these shared gateways, international travelers can connect to nearly 120 airports within the Southwest network.

"Singapore Airlines becomes the eighth carrier in our partnership portfolio exemplified by its quality and reach," said Andrew Watterson, Southwest Airlines Chief Operating Officer. "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."

Network Expansion and Connectivity

The partnership expands Southwest's reach into Asia, Europe, the Middle East, and Africa through its eight active partnerships with overseas carriers. In 2026, Southwest initiated service at five airports, including St. Thomas in the U.S. Virgin Islands, Sint Maarten, Santa Rosa/Sonoma County in California, Knoxville in Tennessee, and Anchorage.

Onboard Enhancements

Southwest continues to invest in onboard experiences with features introduced earlier in the year, including assigned seating, optional Extra Legroom, and enhanced boarding. The airline stated these improvements aim to showcase hospitality and provide greater comfort and choice for customers connecting from international partners.

Southwest Airlines Co. has launched its Week of WOW, a major promotional event offering discounts on flights, hotels, rental cars, and vacation packages. The sale, which runs from June 8 to June 11, 2026, provides customers with opportunities to save on travel bookings and earn Rapid Rewards points. The promotion features more than 20 million seats on sale, including millions of nonstop flights to popular destinations.

Customers can save up to 40% off base fares for select flights from Aug. 4 to Dec. 16, 2026, by using the code FLYWOW. The offer applies to various nonstop routes, including Baltimore to Orlando, Dallas to Las Vegas, Dallas to San Diego, Austin to New Orleans, and Denver to Tampa. Restrictions, exclusions, and blackouts apply, and the discount is applied pre-government taxes and fees.

Travel Product Discounts

In addition to flight discounts, Southwest Airlines is offering promotions on other travel products through Southwest.com. These include savings on rental cars, bonus points on cruises, and discounts or bonus points on hotel stays.

Vacation Packages and Loyalty Benefits

Getaways by Southwest is offering vacation packages with savings of up to $500 for two people, based on a 2-person, 5-night minimum. These packages also include two free checked bags. Rapid Rewards members can access additional benefits, including free WiFi where available, tier benefits, and points accumulation through flying or spending with partners.

Sabrina Callahan, Senior Vice President and Chief Digital & Marketing Officer, emphasized that the Week of WOW provides an opportunity for customers to book trips with some of the best deals of the year. She highlighted the airline's focus on delivering value through Legendary Hospitality, enhanced onboard offerings, a rewarding loyalty program, and industry-leading flexibility with no change or cancel fees.