SOU Summer Sun Routes
As I have said before the Flybe SOU Summer Sun routes will be announced later this month, but will only run until the end of August 2015.
As for other airlines/aircraft that could use SOU, anyone who flies A319/A320/B757/B737/MD83 could operate. I have flown SOU - PMI A320 with Iberworld, B737 with Air Europa, and B757 with Thomson as well as Flybe E195.