The latest connecting destinations from SEN are AMS, BHD, CMF, DUS, EXT, GVA, NQY, NUE, SOU, TLS and ZRH.
Some of these seem a bit ridiculous. Unless you absolutely had to fly from SEN, why would you choose to fly SEN-MAN-SOU-CMF for example, or even SEN-MAN-SOU? If you are travelling to a northern/western destination then going through MAN might be acceptable, but somewhere on the continent, i'm not so sure that would appeal.