UA 5889 then DL 637 at O'Hare
Fort Wayne → Chicago → Seattle (SEA)
Timetable, Chicago time
05:49UA 5889 from Fort Wayne at the gate
17:55DL 637 to Seattle (SEA) leaves the gate
12 h 06 apart on the timetable
DL 637 leaves 12 h 06 after UA 5889 arrives on the timetable: more than half a day, so not a connection we count.