I'm planning a family vacation over Thanksgiving from Houston to Paris - train to London - and then London to Houston. Traveling in Premium Economy.

I realize no one carrier will offer non-stop both ways. My question is on the connecting outbound fly.

Connect through IAD...787 service to CDG
Connect through EWR...787 or 767 service to CDG
Connect through ORD...787 service to CDG

My main concern is weather

TIA