The Tortoise vs The Hare: comic style
Tortoise: Reed Richards, flying a custom built space craft*
vs
Hare: Superman, flying at peek speed**
Course: First one to reach a star 30 light years away and return to Earth wins.
Stipulations: Race takes place in the real world and real world physics apply.
*Unlimited financial resources are available, Reed's lab is on an island in International waters and therefore exempt from real world laws, treaties, and outside political interests. Current real world technology is his starting point. Space craft must be designed and built from scratch.
**For this thread Superman's alien physiology allows him to achieve and withstand the force of traveling 99.99999999999999999999999999999999999% light speed.