Thor legitimately cannot fly, and Marvel proved it in the funniest way possible back in 2011. When Odin took his powers and threw him to Earth, Thor literally walked into the hospital parking lot, spun his bare arm around like a pinwheel, leaped into the air, and immediately fell to the ground. He didn't float for half a second. It proved once and for all that Thor has zero flight powers, Mjolnir is just an Asgardian jetpack, and he’s holding onto the strap getting carried across the sky like a passenger