U2 3173 then KL 1655 at Schiphol
Glasgow → Amsterdam → Firenze
Timetable, Amsterdam time
18:35U2 3173 from Glasgow at the gate
14:30KL 1655 to Firenze leaves the gate
19 h 55 apart on the timetable, overnight
KL 1655 leaves 19 h 55 after U2 3173 arrives on the timetable: more than half a day, so not a connection we count.