Southwest ANA Partnership Opens Japan Connections
The Southwest ANA partnership is now live, and it gives travelers a new way to book Japan and broader Asia itineraries through Honolulu, Los Angeles, San Francisco, and Seattle starting March 10, 2026. Southwest says customers can now book and travel through ANA and its third party travel agencies, while ANA becomes Southwest's seventh international airline partner. For travelers, this is a network expansion story rather than a full loyalty integration story. The immediate benefit is more one itinerary connection options beyond Southwest's domestic network, while the main limitation is that these bookings still are not being sold directly on Southwest.com.
Southwest ANA Partnership: What Changed
Southwest added All Nippon Airways in March 2026 to its growing airline partnership program, and Southwest's own partner page says customers can now book and travel through ANA and its third party agencies. The shared gateways listed by Southwest are Daniel K. Inouye International Airport (HNL), Los Angeles International Airport (LAX), San Francisco International Airport (SFO), and Seattle Tacoma International Airport (SEA). Southwest also says ANA opens access not only to Japan, but to destinations across Asia, Oceania, India, and Europe through ANA's network.
This matters most for travelers who already use Southwest to reach West Coast or Hawaii gateways and want a cleaner handoff onto a long haul international carrier. Southwest describes these arrangements as interlining, meaning two airlines coordinate an itinerary across multiple carriers rather than leaving the traveler to stitch separate tickets together. That can reduce some connection friction compared with separate bookings, especially on complex Japan trips that begin in smaller U.S. domestic markets.
Who Benefits Most From the New Japan Access
The best fit is travelers starting in Southwest heavy domestic markets who need a practical path to Tokyo and onward Asian destinations without first repositioning themselves onto another U.S. legacy carrier. Honolulu can matter for Hawaii and island originating demand, while Los Angeles, San Francisco, and Seattle are the more obvious mainland gateways for broader Japan traffic. Business Travel News reported that tickets are already available, confirming this is an active sales launch rather than an announced future partnership.
The benefit is stronger for travelers who value network reach over airline loyalty perks. Southwest's FAQ says integrated loyalty benefits do not extend to partner airlines at launch, though the carrier says partnership phases are expected to evolve over time. In plain terms, this expands where Southwest customers can go, but it does not yet mean a fully merged frequent flyer experience.
What Travelers Should Do Before Booking
Travelers considering this new option should compare three things before buying: total trip price, connection timing at the gateway airport, and how much self service flexibility they will have if plans change. Southwest says ANA itineraries are currently booked through ANA and third party travel agencies, not through Southwest's own booking flow. That means travelers should read the ticket rules carefully and confirm which carrier's policies control each segment of the trip.
The next decision point is whether the convenience of a coordinated interline itinerary outweighs the simplicity of booking a nonstop or a single carrier connection elsewhere. Travelers with tight same day plans in Japan should still avoid short gateway connections, because partner itineraries add handoff risk even when sold together. Southwest's support materials also note that some online functions can differ on partner itineraries, including bag check steps and check in behavior, which is a practical reminder that this is not yet a fully seamless single airline experience.
What Happens Next for Southwest's International Buildout
ANA is Southwest's seventh international partner, following Icelandair, China Airlines, EVA Air, Philippine Airlines, Condor, and Turkish Airlines. The pace matters. Southwest launched its first international partnership in early 2025, and by March 2026 it had built a broader bridge from its domestic network into Europe, the Middle East, and Asia. That is a structural change in how travelers can use Southwest, even if the program is still in an early operational phase.
What comes next is less about this one ANA link and more about whether Southwest can make these partnerships easier to book, easier to manage, and eventually more useful for Rapid Rewards members. Southwest's own FAQ says loyalty integration is planned for future phases, but it has not published a timetable for ANA specific earning or redemption benefits. Until that changes, the Southwest ANA partnership is best viewed as a network access expansion that improves Japan booking options now, while leaving the loyalty and servicing side unfinished.