SXM may not be the only stop on the flights. For example, the routing for KLM789 tomorrow is AMS-SXM-CUR-AMS.
There may be passengers being repatriated to Curaçao on the inbound flight. I don’t think that SXM is accepting repatriated passengers at the moment, but I may be wrong about that.
https://www.curacaochronicle.com/post/local/klm-to-repatriate-residents-to-curacao-on-june-6/
.
