system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] How fast does a Green Lantern fly?

Obviously these guys must be able to travel entire seconds in mere minutes (or hours or whatever). So whilst they obviously can't move as fast as the Speed Force, surely they could keep up with the likes of Superman and Shazam?
gpt
The Hubble Extreme Deep Field (XDF) has shown that there are at least 175 Billion galaxies in the universe, perhaps more. With 3600 Green Lantern sectors, that means that each Lantern has somewhere around 49 million galaxies to patrol. The nearest galaxy to our own is about 2.5 million light years away. So even if a Green Lantern could travel at a million times the speed of light, it would still take two and a half years just to go from one galaxy to the next--and they have 49 million of these things in their jurisdiction. They have to be moving billions or even trillions of times the speed of light when in space, just to do their job. The only other option would be for them to spend lifetimes simply trying to get from one side of their sector to the other.