Southwest Airlines Partners with South Korea Air Premia to Connect Transpacific Flights with Over 120 United States Destinations by Late 2026

SEO Title: Southwest Airlines Air Premia Interline Partnership 2026 Meta Description: Southwest Airlines has signed an interline agreement with South Korea's Air Premia, linking flights via Los Angeles, San Francisco, and Honolulu. Slug: /southwest-airlines-air-premia-interline-partnership-2026 Standfirst: Southwest Airlines has signed a strategic interline agreement with South Korean hybrid carrier Air Premia, allowing transpacific passengers to connect to over 120 destinations across the United States. The flights will connect via Honolulu, Los Angeles, and San Francisco.

Article

[Dallas, July 9, 2026] — Southwest Airlines has entered into a new interline partnership with South Korean hybrid airline Air Premia. The agreement establishes a coordinated transit network through three major United States gateways: Los Angeles International Airport, San Francisco International Airport, and Honolulu Daniel K. Inouye International Airport.

Passengers traveling from Seoul can now book a single connected itinerary to reach cities across North America. Tickets are available through Air Premia's sales channels, online travel platforms, and traditional corporate travel agencies.

This partnership is Southwest's first commercial agreement with a South Korea-based air carrier. The arrangement allows Southwest to capture international passenger traffic without operating its own long-haul aircraft.

Interline Partnership Structure and US Gateway Hubs

The partnership allows Air Premia to expand its market presence in the highly competitive transpacific aviation corridor. By connecting with Southwest, the South Korean carrier can offer its customers onward flights to more than 120 cities.

Southwest Chief Operating Officer Andrew Watterson stated that the partnership increases travel options for domestic customers while introducing new international markets to the airline. The airline has increasingly turned to international partnerships to boost network utility.

For Air Premia, Chief Executive Officer Yoo Myung-sub noted that accessing Southwest's domestic routes creates significant value for passengers. The airline combines low fares with premium cabin features to attract cost-conscious business and leisure travelers.

Strategic Significance for Southwest Airlines and Air Premia

Under the interline agreement, transit procedures are simplified at the three designated West Coast and Pacific gateways. Passengers transferring between flights receive coordinated baggage handling and single-ticket booking protections.

The agreement opens access to mid-sized American markets that lack direct international flights from Asia. Popular onward destinations include Las Vegas, Chicago, Houston, Phoenix, Denver, Portland, and Nashville.

Inbound tourism officials expect the partnership to distribute international visitor spending more broadly across the United States. Travelers can easily include multiple cities on a single vacation itinerary.

Passenger Connection Logistics and Destination Access

Southwest Airlines has steadily built an international partner network to feed traffic into its domestic operations. Its current roster of global airline partners spans key markets in Europe and Asia.

In addition to Air Premia, Southwest maintains interline relationships with carriers such as Icelandair, China Airlines, EVA Air, Philippine Airlines, Condor Airlines, Turkish Airlines, All Nippon Airways, and Singapore Airlines.

Meanwhile, Air Premia continues to build its own international alliances to increase flight options. The carrier's existing partner list includes Korean Air, Thai Airways, and T’way Air.

Data Table

Southwest Airlines and Air Premia Interline Overview

Feature / Parameter	Operational Details	Gateway Transfer Points
Partner Carriers	Southwest Airlines & Air Premia	Los Angeles (LAX)
Partner Home Base	United States & South Korea	San Francisco (SFO)
Destination Reach	Over 120 domestic US airports	Honolulu (HNL)
First-Time Status	Southwest's first South Korean partner	West Coast & Pacific transit hubs
Booking Methods	Air Premia website, GDS, travel agencies	Single ticket itinerary coordination

Southwest Airlines Global Partner Portfolio

Region	Partner Airline	Base Country / Hub
South Korea	Air Premia	Seoul Incheon (ICN)
Japan	All Nippon Airways (ANA)	Tokyo Haneda / Narita
Singapore	Singapore Airlines	Singapore Changi (SIN)
Taiwan	China Airlines / EVA Air	Taipei Taoyuan (TPE)
Philippines	Philippine Airlines	Manila (MNL)
Germany	Condor Airlines	Frankfurt (FRA)
Europe	Icelandair	Reykjavik (KEF)
Turkey	Turkish Airlines	Istanbul (IST)

Air Premia Interline Portfolio

Partner Airline	Carrier Class	Regional Headquarters
Southwest Airlines	Low-Cost / Domestic	Dallas, United States
Korean Air	Legacy / Full-Service	Seoul, South Korea
Thai Airways	Legacy / Full-Service	Bangkok, Thailand
T’way Air	Low-Cost Carrier	Seoul, South Korea

Why This Matters

This interline agreement represents a strategic shift in Southwest Airlines' long-standing aversion to code-sharing and interlining. For decades, Southwest operated as a strictly point-to-point domestic airline with no international partners. By signing agreements with hybrid and boutique carriers like Air Premia, Southwest is transforming its high-frequency domestic network into a feeder system for foreign long-haul flights. This allows the airline to generate high-yield international passenger revenue without incurring the massive capital expense of buying widebody aircraft or securing foreign slots.

Our analysis of the transpacific aviation market indicates that this partnership is a direct threat to legacy alliances like SkyTeam (led by Korean Air and Delta) and Star Alliance (led by Asiana and United). Air Premia offers lower business and premium economy fares than its full-service competitors. By bundling these affordable transpacific flights with Southwest's domestic network, the partnership creates a highly competitive low-cost alternative for corporate and academic travelers who previously relied on legacy carriers.

Additionally, this agreement highlights the growing importance of secondary gateway airports like Honolulu for international-to-domestic transfers. Transferring passengers at LAX or SFO can be highly congested. Utilizing Honolulu as a transit hub allows travelers to clear customs in Hawaii before continuing to the US mainland as domestic passengers on Southwest, bypassing the crowded terminal transfers of West Coast gateways.

Industry Outlook

Market trends suggest that hybrid carriers will continue to expand their market share through niche interline partnerships. As widebody aircraft deliveries face ongoing delays, airlines will focus on maximizing existing route capacity through cooperative booking agreements.

On the distribution side, the integration of different airline ticketing platforms will require upgrades to global distribution systems (GDS). Ensuring that passengers can select seats and check bags across both Southwest and Air Premia systems will be critical to the partnership's success.

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