Kryptonite and alien technology
That is a matter of personal opinion, if you think about it, Superman is indestructible, but is vulnerable to kryptonite. Batman is also a good superhero but is vulnerable to normal pain
Primarily, Superman's weakness is kryptonite, fragments of his home planet Krypton. He is also vulnerable to magics.
Superman was famous for being the "Man of Steel" and save thousands of inocent bystanders from certain doom! P.S.He is vulnerable to kriptonite!
Superman and Doctor Doom helped save the Earth! Thing heard the news. "Ben! Will you lose or will you win?" Human Torch asked. "I am stronger than him. Don't worry. He helps worlds except for our world. I will win." Thing said. "Time to be Thing." Thing went out to fight Doom. "What do you want?" Doom asked. "SUPERMAN!" he yelled. Superman flew to Thing. "I am Superman. We will save a world." Superman said. What he meant that all the universes will be saved except for Thing's. Superman punched Thing 9 times but Thing punched him 1 time and hurt his hand. "He must be strong, Ben! I told you need us." Human Torch said. "I won't give up! Go! He will beat you guys too!" Thing said. Human Torch flew away. "I can also beat you." Superman shouted. Thing got angry. "Run along!" Superman said. "Don't tell me what to do!" Thing yelled. "Let's hold it, Thing! Shall we?" Superman threatened. Superman pinned him to the floor without touching his arm. "Run along" Thing said. "We will win! We know it!" Superman said. Superman nearly killed Thing with his punch but a knockout. "You killed him!" Invisible Woman said to Superman. "My plan was to lock him up." Doom yelled. "Now go away!" Superman threatened. "No!" Mr. Fantastic yelled. Superman killed all three at the same time. Superman won.
Kryptonite is the only known substance that can weaken and harm Superman, as it is radioactive remnants from his home planet, Krypton. Exposure to kryptonite can drain Superman of his powers and make him vulnerable.
Most definitely Superman
Superman is better. Superman is stronger, faster, much more experienced in battle than most lanterns seeing as they had a reboot. Superman is weak to magic only, the only lantern possible of doing that would be the Hal Jordan when he was possessed by the spectre and in that case it would be superman vs the spectre, not the same thing.
Don't forget his cousin Supergirl - kryptonite affects her, too.
Depends on the version of superman. Most versions of superman win.
His cousin, Supergirl is also vulnerable to kryptonite.
This is probably Superman. He is the strongest character out of all of them and is the most well-known as well.
Well, if Superman was real, probably not, most birds and planes can't but superman might, if he was real.