I am going to Europe for my first time in Feb, and I have my outgoing flight booked (BNA>EWR>MAN).

My return home is my question mark. I have United points I want to book ideally, and I have found a nonstop CDG (we are going to fly back out of Paris) >ORD and it lands at ORD at 3pm local time.

I need to then get to Nashville BNA from ORD. There's a Southwest flight (I have points) at 6:05pm but that gives me 3 hours to get through customs and from ORD to Midway--- I assume not enough time at all?

I guess my only other option would be to catch (pay) another flight from ORD to BNA. I see a 7pm flight ,but trying to minimize my layover time as well.

Any recommendations? There's also a CDG>IAD non stop but can't find a Southwest flight or anything reasonable from IAD to BNA on 2/14.