X3 2139 then EN 398 at Frankfurt
Fuerteventura → Frankfurt am Main → Luxembourg
Timetable, Frankfurt am Main time
23:05X3 2139 from Fuerteventura at the gate
21:10EN 398 to Luxembourg leaves the gate
22 h 05 apart on the timetable, overnight
EN 398 leaves 22 h 05 after X3 2139 arrives on the timetable: more than half a day, so not a connection we count.