score:5
The VRS Pocket Guide (PDF) has all the info you need in a very accessible format. I've copied the fare segment here:
The weekly ticket (which always starts on Monday!) can be very cost effective if your travel matches it.
To figure out which type of ticket you need (1-7) you can input your trip in this journey planner: http://auskunft.kvb-koeln.de/kvb/cgi?lang=UK
It will show the required ticket for each proposed route (e.g. "Preisestuff 4"). For example, travel within Cologne requires a 1b ticket, travel between Cologne and Bonn requires a 4 ticket and travel between Cologne and Dusseldorf requires a 5 ticket.
Upvote:1
you can get day-passes (called "TagesTicket") if you know you need to take the trains regulary on that day. They cost 8.50 for 1 person or 12.90 for 5 persons in the area of cologne, for the other variants check out their site (https://www.vrsinfo.de/tickets/preisliste.html)