UA 1949 then AA 3537 at DFW
Houston → Dallas-Fort Worth → Fort Smith
Timetable, Dallas-Fort Worth time
21:50UA 1949 from Houston at the gate
21:45AA 3537 to Fort Smith leaves the gate
23 h 55 apart on the timetable, overnight
AA 3537 leaves 23 h 55 after UA 1949 arrives on the timetable: more than half a day, so not a connection we count.