WN 993 then UA 2264 at Denver
Baltimore → Denver → Tucson
Timetable, Denver time
11:45WN 993 from Baltimore at the gate
11:20UA 2264 to Tucson leaves the gate
23 h 35 apart on the timetable, overnight
UA 2264 leaves 23 h 35 after WN 993 arrives on the timetable: more than half a day, so not a connection we count.