I actually booked this reservation through CO using One Pass points using standard reward levels. When booked, he was originally coming back through ORY on DL 53. Learned about 2 weeks ago that DL cancelled this flight so had to switch to in/out of CDG. When I rebooked through CDG, CO said DL 119 was available. I don't know (and should) if this was the only flight available at the standard reward level (or if it makes a difference since itinerary was involuntarily changed).

I will go back to CO to see if DL 83 is available as an abundance of caution.