Wine in luggage is fine on every airline I've flown. I've even packaged a case of wine and flown it (all domestic US with a case but bottles in suitcases internationally) Only regulations I've seen have been on total ABV and a case of wine doesn't exceed. Check your airline regulations. I've brought wine on a lot of trips ;-) I'd definitely just package the bottle well (you can buy specialty packaging ahead of time) and put it in the checked suitcase.