Solenta aviation have ATRs based in Abidjan that fly to Freetown. Air Cote de Ivore have 320s once again based in Abidjan, how much bus time you got? SAS Mali might have 1900s based in Conakry? As for any airline based in Freetown, I’ve never seen in the few years I was flying in and out of there. Then again last time I was in Freetown was a few years ago.