Complex sentence: The flight began at Daimler's Sindelfingen base on 16 February, crossing the Alps and returning via Budapest and Vienna, arriing at Sindelfingen on 16 March.
Split into simpler sentences: The flight began at Daimler's Sindelfingen base on 16 February. The return journey reached eastwards, skirting the Alps via Budapest and Vienna and arriving home at Sindelfingen on 16 March.