France is open to folks vaccinated June 9. I priced tickets ATL-> CDG in Oct to check.
$1,135 economy ( a good price really, but odds are good you'll be near screaming kids)
$1,303 economy comfort (we usually choose this level)
$1,645 premium select (this is about like first class domestic, or business class in the olden times)
$4,253 Delta One (this usually is over $5K, I've seen in the sevens)
A reason to upgrade some, aside from leg room, is to get away from kids. Prices are relatively low right now.
I booked Hawaii a month ago in Dec. and first class tickets were $1650 or so, that is the normal economy class fare. This is domestic FC, not Delta One, goes through LAX.
Were I wealthy, I'd just blow the extra $3K times 2 and not worry about it. But I always think "Man, I could do stuff with the extra $5k ...