Inside Southwest Airlines' Massive 2026 Caribbean Expansion

For the first time since 2021, Southwest Airlines is aggressively expanding its international footprint by adding brand-new tropical destinations to its route network. If you have been looking for an easier, more affordable way to trade the mainland for pristine island shores, your vacation planning just got a lot more exciting.

Launching throughout the first half of 2026, Southwest’s major Caribbean expansion introduces direct access to two of the region's most beloved island gateways. Here is everything you need to know about the new routes, departure cities, and when you can catch your next flight.

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1. St. Thomas, U.S. Virgin Islands (Service Starts Feb 5, 2026)

Southwest officially kicks off its island expansion by landing at Cyril E. King International Airport (STT) on the picture-perfect island of St. Thomas. Serving as the gateway to the U.S. Virgin Islands, St. Thomas is a dream destination for travelers chasing world-renowned beaches like Magens Bay, historic Dutch-European architecture, and easy ferry access to nearby St. John. Since it is a U.S. territory, American travelers won't even need a passport to make the trip.

The Routes:

• Orlando (MCO): Daily nonstop round-trip service officially takes flight on February 5, 2026.


• Baltimore/Washington (BWI): Perfect for a quick winter escape, peak-day weekend nonstops roll out starting February 7, 2026.

2. St. Maarten (Service Starts April 7, 2026)

Just a couple of months later, Southwest will plant its flag at Princess Juliana International Airport (SXM) on the vibrant island of St. Maarten. Famous for its unique dual French and Dutch culture, world-class shopping on Front Street, and the iconic Maho Beach (where aviation fans watch commercial jets roar directly overhead), St. Maarten is a heavy hitter in Caribbean travel.

The Routes:

• Orlando (MCO): Once-daily nonstop service will bridge Central Florida and St. Maarten starting April 7, 2026.


• Baltimore/Washington (BWI): Weekend nonstop service from the Northeast launches just two days later on April 9, 2026.

A Network Transformation: Connecting 45+ Cities

While Orlando and Baltimore serve as the primary launching pads for these new international routes, the expansion actually benefits travelers across the entire United States. Because of how Southwest spaces its daily flight banks, passengers originating in more than 45 domestic cities will be able to book single-layover, seamless connection itineraries straight to St. Thomas or St. Maarten.

This leisure-focused push comes at a fascinating time for the carrier. The 2026 Caribbean expansion coincides with a massive operational shift for Southwest, as the airline rolls out assigned seating, premium cabin sections with extra legroom, and new reconfigured fleet layouts.

The Bottom Line for Travelers

Southwest's entry into these premium island markets is a massive win for consumers. Not only does it introduce healthy competition that typically drives down overall airfares, but it also means travelers can finally redeem Rapid Rewards points and take advantage of Southwest's legendary "Bags Fly Free" policy on long-haul beach vacations.

Flights for the 2026 spring and summer seasons are already loaded into the airline's booking schedule, so make sure to check your points balance and lock in your island getaway early!