Which airline still uses the 737-200?
Sky King (SGB) has three charter 737-200’s. They often are chartered for sports teams I’ve seen in the past.
Sierra Pacific Airlines also has 2 737-200’s that they primarily use for military charters. The aircraft are based in Tucson (KTUS).
During the fire season they operated a lot of flights for the Forest Service shuttling fire fighters.
Bahamasair, Air Inuit, Air North, First Air.