Originally Posted by
Ocn Vw 1K
Welcome to posting on FlyerTalk, fd76180. To have the best answer to your Q., the community will need to know where you're connecting and the airline(s) involved. If, for example, your connection is in the U.S. and to the same airline, then 45 minutes to an hour should be ample. If your connection is overseas and to another airline, you may definitely need more time, including for customs/immigration checks.
Ok, the details

I'm flying UA from DFW to ORD to FRA.