Are my uneven nostrils due to a deviated septum? (photo)

Yes, the notrils are likely uneven from deviated septum. Fixing the septum will make them more symmetrical. RegardsDr.J

I see this issue all the time. The fact that nostrils appear asymmetric on basal view is an indication that there could be septal deviation to one side or the other causing the entry point of the nostrils to be different. There's also the possibility that the cartilage of the tip of the nose called the lower lateral cartilage is slightly longer on your left side. Properly executed nasal tip surgery and refinement and realignment of the supple cartilages can lead to a much more balanced and natural appearing nose. I recommend that you seek the advice of a double board-certified facial plastic surgeon. Thank you for your comments and I wish you the best of luck.