There is 3 ways you can purchase tickets
Toll free at (800) 417-4139
Local at (210) 244-5700.
Click this link to purchase tickets online. Please note that purchasing tickets online ensures you a ticket, however passenger boarding is first come, first served. Also keep in mind that your ticket is mailed to you after your purchase online.
If you are already in San Antonio, head on down to one of the three kiosks located along the River Walk. So where are the kiosks located? We went ahead and created this cool map so you can easily locate the nearest River Boat ticket booth to you.