Singapore Airlines, Southwest and Scoot Link Asia to 120 U.S. Airports

Travel between Southeast Asia, Australia and smaller U.S. cities is set to become more seamless, as Singapore Airlines joins forces with Southwest Airlines and Scoot to offer one booking from Ho Chi Minh City, Singapore and Sydney to nearly 120 airports across the United States.

New Interline Partnership Extends Singapore Airlines’ Reach

Publicly available information from both carriers shows that Singapore Airlines and Southwest Airlines have launched an interline partnership linking Singapore Changi Airport with nearly 120 U.S. destinations on a single ticket. The tie up, announced during the International Air Transport Association’s annual gathering in early June 2026, connects Singapore Airlines’ long haul services into Los Angeles, San Francisco and Seattle with Southwest’s extensive domestic network beyond those gateways.

The arrangement allows travelers to combine Singapore Airlines operated flights with Southwest operated segments under one booking, with bags typically checked through to the final destination and itineraries handled under standard interline rules. Travel industry reports indicate that itineraries are being sold through Singapore Airlines’ own sales channels, travel agencies and online travel platforms, while Southwest’s website continues to focus on its own standalone services.

According to published coverage, this is Southwest’s latest step in building a portfolio of international partners after earlier interline agreements with carriers in Europe, Asia and the Middle East. For Singapore Airlines, the deal deepens access into North America without the cost and complexity of operating its own domestic U.S. network, tapping instead into a carrier that serves more than 100 cities across 42 states and nearby international points.

While the cooperation currently centers on three shared U.S. gateways, the scale of Southwest’s route map means that Singapore-originating passengers can now reach a wide spread of secondary and tertiary American cities with guaranteed connections under a single ticket, shifting traffic that previously relied on other alliance and joint venture partners.

One Booking From Ho Chi Minh City, Singapore and Sydney

The new connectivity hinges on Singapore’s Changi Airport as a hub, feeding long haul departures to the United States with flights from across the Singapore Airlines and Scoot networks. Both carriers serve Ho Chi Minh City and Sydney, among other points, creating itineraries where passengers can begin their journey in Vietnam or Australia, connect in Singapore, and then travel nonstop to Los Angeles, San Francisco or Seattle before continuing on Southwest to their final U.S. airport.

Route data and schedule information show that Ho Chi Minh City is linked to Singapore multiple times daily, while Sydney is served by a mix of Singapore Airlines and Scoot operated flights. These short and medium haul services are already integrated within the wider SIA Group network, making them natural feeders into the new interline flows at Changi and onward to the United States.

For travelers in Ho Chi Minh City, the development presents a new one ticket option to reach smaller American cities that previously required self connecting or using different alliance combinations through North Asian or Middle Eastern hubs. Passengers from Sydney gain an additional pathway as well, supplementing existing transpacific and transpolar choices with a routing via Singapore and a domestic U.S. leg on Southwest.

Industry observers note that by anchoring the partnership on Singapore Airlines’ own U.S. gateways and leveraging Scoot’s regional presence, the SIA Group is effectively extending its virtual footprint to match the breadth of a U.S. carrier with deep domestic coverage. The result is a single booking that can link city pairs such as Ho Chi Minh City to mid sized American communities, or Sydney to inland business centers, through a three step itinerary handled under one reservation.

How the Singapore Airlines and Southwest Link Works

According to publicly available guidance, the cooperation between Singapore Airlines and Southwest is structured as an interline agreement rather than a codeshare. That means each airline continues to market flights under its own two letter designator, and itineraries show both carriers’ flight numbers even when sold together on a single ticket originating with Singapore Airlines or through a travel intermediary.

Under this model, customers check in with the first operating carrier on their itinerary, and their baggage is generally tagged through to the final Southwest destination within the United States, subject to customs and immigration procedures at the first U.S. point of entry. If a misconnection occurs due to delays within the interline framework, rebooking support follows Singapore Airlines’ and Southwest’s published policies for such itineraries, rather than the more tightly integrated practices found in revenue sharing joint ventures.

Travel trade coverage indicates that the interline tickets can combine multiple Southwest domestic legs, enabling routings from the West Coast gateways to cities across the Midwest, South and East Coast. Because Southwest’s network is largely point to point rather than hub and spoke, some journeys may involve unconventional connection points, but remain covered under the same booking reference that begins in Ho Chi Minh City, Singapore or Sydney.

The partnership does not at this stage introduce shared loyalty accrual across the two airlines. Publicly available information on Singapore Airlines’ loyalty program notes that KrisFlyer members are not able to earn or redeem miles on Southwest operated flights under this arrangement, underscoring that the agreement is focused on schedule connectivity and baggage handling rather than deeper commercial integration.

Scoot’s Role in Feeding the New Transpacific Flow

Scoot, the low cost carrier subsidiary of Singapore Airlines, plays a supporting role by expanding the pool of cities that can feed into the long haul services bound for the United States. The airline’s network across Southeast Asia, North Asia and the South Pacific includes routes from Ho Chi Minh City and Sydney to Singapore, operated with single aisle Airbus jets and widebody Boeing 787 aircraft.

Previously, many Scoot itineraries connected solely within the Asia Pacific region or paired with Singapore Airlines flights to form hybrid journeys under the broader SIA Group umbrella. With the Southwest partnership now in place, those same Scoot operated legs can serve as the first step in a multi segment itinerary that ultimately delivers passengers to smaller American cities via Changi and the three U.S. gateways.

Press materials from Scoot in recent months have highlighted the carrier’s rapid expansion and investment in additional aircraft, signaling a strategy of deeper regional penetration around Singapore. That growth, combined with interline and codeshare links within the SIA Group, strengthens the pipeline of passengers who might choose to travel from emerging cities in Southeast Asia onto long haul flights and then connect to Southwest services in the United States.

For price sensitive travelers, the presence of Scoot on the first leg offers the potential for more competitive fares from markets such as Ho Chi Minh City and Sydney into Singapore, while still retaining the security of a protected connection to the United States once they transition to Singapore Airlines and Southwest on a single booking.

Implications for Competition and Travelers

Aviation analysts suggest that the Singapore Airlines, Scoot and Southwest combination could subtly shift competitive dynamics on traffic flows between Asia, Australia and secondary U.S. cities. Traditionally, such journeys have often been routed through hubs operated by major North American, Middle Eastern or Northeast Asian carriers offering integrated alliances and joint ventures with U.S. domestic networks.

By weaving together a Southeast Asian hub, a low cost regional subsidiary and a large U.S. point to point carrier, the new arrangement provides an alternative path that may appeal to travelers prioritizing schedule options and baggage convenience over loyalty earnings. It also positions Singapore Changi Airport as a stronger gateway for passengers starting in cities like Ho Chi Minh City or Sydney and bound for U.S. destinations that lie far beyond the coastal entry points.

For consumers, one of the most tangible benefits is the removal of separate tickets and self transfer risk when connecting from long haul flights onto domestic U.S. services. Being able to book a single itinerary that includes Ho Chi Minh City to Singapore on Scoot or Singapore Airlines, Singapore to Los Angeles, San Francisco or Seattle on Singapore Airlines, and then onward to a smaller American airport on Southwest simplifies trip planning and reduces exposure to missed connections not covered by airline policies.

The development also reinforces a broader trend in global aviation, in which airlines outside traditional alliances are turning to flexible interline structures to widen their reach without committing to deeper, more complex partnerships. As Singapore Airlines, Scoot and Southwest bed in their cooperation, travelers watching fares and schedules between Asia Pacific and the United States are likely to see new city pairs emerge, and additional itinerary options appear across booking channels that support the one ticket concept.