Originally Posted by DKDetective
Personally, I've never liked the idea of Superman being able to travel beyond our solar system without a ship and suit as it makes little logical sense given how his powers are typically explained as coming from Earth's yellow sun. Honestly, I'm fine with him not being able to travel to the sun in minutes in MoS. However, I think it could possibly be explained by the greater solar energy he gets exposed as he gets closer to the suit. So his maximum speed is constantly increasing as he gets closer and then would gradually decrease as he travels away.
That makes plenty of sense. Whether they get too far into the science of it or not, I think that could work.
I also don't need him to be able to leave our solar system unaided. I just feel like if he does, they have to remain consistent with his flight speeds.