Originally Posted by Nazdoom

ORD-FRA-BAH. Arriving in FRA T1 [LH or UA, to be determined], 5 hour layover, departing from FRA T2 on GF. Checked baggage but UA and LH both appear to interline with GF. One ticket.

This connection (T1->T2 airside transfer between two non-Schengen places) does not require going through immigration and thus no Schengen visa is required, right? No issues? Pax has no Schengen visa but would require one to actually enter Schengen (not from a country requiring an airport transit visa though).