AA 3166 then UA 3917 at San Francisco
Philadelphia → San Francisco → Denver
Timetable, San Francisco time
19:51AA 3166 from Philadelphia at the gatealso BA 5438
21:45UA 3917 to Denver leaves the gatealso UA 3919
1 h 54 apart on the timetable
The last days
AA 3166 and UA 3917 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.
Later flights to Denver
No later flight to Denver on the timetable.