Southwest Airlines March 2026 International Network Additions

NW25
Written By AeroRoutes - Jim Liu

Published at 0100PDT / 0800GMT 21AUG25

Southwest Airlines last week opened reservations for new international routes scheduled in March 2026. Planned network additions include the following.

Indianapolis – Los Cabos/Cabo San Lucas eff 07MAR26 1 weekly 737-700
Kansas City – Punta Cana eff 07MAR26 1 weekly 737-800
Nashville – Montego Bay eff 07MAR26 1 weekly 737 MAX 8
Nashville – San Jose (Costa Rica) eff 07MAR26 1 weekly 737 MAX 8
St. Louis – Puerto Vallarta eff 07MAR26 1 weekly 737-700
San Diego – Puerto Vallarta eff 05MAR26 5 weekly 737-700

Previously reported addition:
Baltimore/Washington – St. Thomas eff 07FEB26 3 weekly 737-700 (4 weekly from 16FEB26)
Orlando – St. Thomas eff 05FEB26 1 daily 737-700

AeroRoutes - Jim Liu

Jim previously launched and ran Airlineroute between 2007 and 2020, now owns and runs AeroRoutes.

https://aeroroutes.com
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