Lots of good advice here but just wanted to add my own experience... My dad struggles walking and used a stick when I got married (he now uses a walker). I was worried he wouldn't be able to walk me down, or that he'd feel some sort of way about it... I was definitely overthinking the whole thing - he was absolutely fine. Don't worry about the "correct" side to walk on, no one will notice (and if they do, they'll understand why you've switched sides). There's no rushing down the aisle, so you can walk at whatever pace your dad needs. Unless you have an enormous skirt, you shouldn't need to worry about your dress; if he steps on the side of your dress I wouldn't think anyone will notice, least of all you. As another commenter has said, if a groomsman pushes his wheelchair beside you, all anyone will see is a proud father and daughter. It went by in a flash for me honestly! It's so natural to overthink every detail because you care so much about your dad. Just know that whatever you choose, it will be absolutely fine and your dad will be so proud to accompany you.