I would turn them.
IMHO, turning eggs is much more important than preserving a perfect air cell. No matter how long you keep them upright, if there is a ruptured inner membrane, you aren't going to repair it by keeping them erect. Turning is most critical during the first 12 to 14 days and by keeping them upright, you are dipping into that valuable time.
Turning during the first 2 weeks is essential for development of the amnionic and chorion--allantois membranes that is critical to nurturing the growing embryo. The air cell isn't essential till pipping. If the future chick doesn't make it that far, it doesn't matter.
Perhaps read through the following information.
https://thepoultrysite.com/articles/the-biology-behind-egg-turning