Even in a world of cheap energy, space travel is expensive and can be time consuming. Below are some basic tables to determine the cost, time, and difficulty of certain ventures.
Travel in space is unique because it does not require constant thrust like atmospheric flight- one must only accelerate then decelerate to get from the point of origin to the destination. Due to this, travel costs are estimated in light-minutes/day (or "jots"), reflecting the speed at which the ship travels.
Example: Mars is about 14 light-minutes from Earth on average. If a captain wanted to get there in 2 weeks, he would expend 14 jots, which is a lot cheaper than if he wanted to get there in 2 days, which would cost 98 jots (multiply the original cost by 7 because the time traveled is divided by 7). If he were patient and could wait 4 weeks, he would only have to pay 7 jots.
Getting to the moon would cost about .0008 jots if one wanted to get there within a hour.
In addition to the Jot cost of flights, there is also a risk factor- every day spent flying, a standard roll is made. If it is greater than the risk factor, nothing happens, and if it is less there is an encounter based off of a table. This roll can be improved by spending an appropriate token, should a player wish to.
Travel can be easily estimated by three "aspects"- light-minute distance, advanced routes, and risk factor/table.
Of course, everything related to space travel in Drifting is an approximation and very unscientific-it's not actual rocket science, it is easy pretend rocket science, written by an author who tends to play fast and loose with math.