Loganair S21 frequencies from Southampton:
Edinburgh - Southampton - 25x weekly flights (4x M-Fr, 2x Sa, 3x Su)
Glasgow - Southampton - 25x weekly flights (4x M-Fr, 2x Sa, 3x Su)
Newcastle - Southampton - 18x weekly flights (3x M-Fr, 1x Sa, 2x Su) - 1x M-Th extends to/from Aberdeen