The travel system is basic and easy to understand. Traveling costs will vary based on location and distance. The least of the costs in travelling being two points. Example: Seireitei to Rukongai and vice-versa. The most expensive costing up to 6 travel points. Example: Seireitei to Karakura, Rukongai to Karakura, and their vice-versa.
Safer travels will give you a smaller chance of encountering enemies on your way, while traveling the most dangerous travels has a higher chance of encountering an enemy on your way.