Most likely a wheel bearing. Just had the same happen in my car. If the hub doesn't need replacing, it's ~185. Bearing was 58, labor 125. If the hub needed replacing don't want to know.
Get it checked as soon as you can. I would guess when the bearing starts to turn in the hub is when you need the hub replaced.
You can usually tell which side from the noise reducing in a turn to the right or left. High speed ramps from highway to highway are a good way to check that.
Good luck
