Well terrible spelling - should be "Misconnect." Can't fix it...

I am flying SMF-SFO-CDG with one of my parents (UA Silver) in November. We have a 1:20 connection between the two flights which meets the MCT rules. However the SMF-SFO UX flight has an atrocious on-time rating. Only 27% of 62 flights arrived on time with an average delay of 82 minutes according to FlightStats.com.

If we miss the 2:00PM SFO-CDG flight, there are no more United metal nonstops or connections that would get us out that day. An Air France nonstop leaves later and Swiss to Zurich and Lufthansa to Munich are options that take more time.

If we miss the connection due to operations or weather, what are the chances on getting rebooked on AF as a first choice or LX and LH as 2nd and 3rd choices?

Thanks!