Flies 215 parsecs in less than a day

Reaching for the door handle, Mr. Popo slowly pulled the door open. "Very well. You may enter." Neither Vegeta nor Trunks could see inside; it all appeared to be just a white blur of...nothing.

"Once you cross the threshold, you will spend an entire year of your lives training here. But when you return, only a day will have passed in this realm," the genie said, reminding them a final time. "Good luck."

...

Cell had finally figured it out. It clearly took a lot more energy than Goku's comparatively effortless move, but it was better than nothing.

By stabilizing a toroidal wormhole around his body, the gauge bosons confining him to ordinary space were decoupled. The result was immediate superluminal flight in any direction he chose...identical, in fact, to the slipstream drive employed by all the ships in the Empire.

Cell did a few laps around Mars, flew through the rings of Saturn, then paused. Wordlessly, he took off, heading away from the solar system entirely.

- Bringer of Death Chapter 54

"Magnificent."

At a distance of 215 parsecs from Earth, Cell hovered motionless in the void of space, his voice inaudible against the vacuum. Initially, he had flown without aim or purpose, simply cleaving through hyperspace for the sheer joy of feeling his perfection. But something had caught his attention as he flew...a blue-white supergiant star, tucked neatly inside a diffuse nebula.

- Bringer of Death Chapter 55

Suddenly, they all felt a rush of energy around them. Two powerful ki signatures, both previously obscured by the Hyperbolic Time Chamber, shot through their minds from out of nowhere. Everyone immediately froze, turning towards the domed lookout.

"That's them!" Gohan shouted. "They're finished with the whole year!"

- Bringer of Death Chapter 57