AA 1253 then WN 335 at San Francisco
Chicago O'Hare → San Francisco → Austin
Timetable, San Francisco time
09:40AA 1253 from Chicago O'Hare at the gatealso QF 4697
13:55WN 335 to Austin leaves the gate
4 h 15 apart on the timetable
The last days
AA 1253 and WN 335 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.