Join Date: Nov 2000
Location: Nashville -Past DL Plat, FO, WN-CP, various hotel programs
Programs: DL-MM, AA, SW w/companion,HiltonDiamond, Hyatt PLat, IHF Plat, Miles and Points Seeker
Posts: 11,405
Welcome to the boards.
common concern, but usually works out fine.
Lots of stories here about people that forgot to book the companion. Been there, done that. Just kept checking until a seat opened up.
As said, if you have enough points, book a "paid" ticket now just in case.
BUT - BUY YOUR TICKET NOW. No need to wait.