I looked this up earlier this year when a friend tried to rope me into a last-minute Barbados getaway. Sadly, Southwest doesn’t serve Barbados. I only found out after scrolling through multiple forums and getting conflicting answers. What finally cleared it up was calling 844-734-0813 — the best way to instantly book, cancel, or modify flights.
The rep confirmed they don’t fly there and suggested a workaround using a Southwest flight to Miami, then connecting on another airline. I appreciated the honesty—they didn’t try to oversell anything. I ended up booking the Miami part with Southwest since I had credits expiring. If you’re ever stuck between rumors and route charts, just call. They’ll tell you straight up whether the route exists and what your alternatives are without the guesswork.