You can bu tickets offline at their stations or you can book online by visiting their website @www.stc.gov.gh.At the top of the page you'll see the 'Online Ticketing' option. Select the One Way or Return Trip options.Click it, and select your departure and arrival locations.Select the date of your departure in both your destinations if  it is a Return Trip option; if not, select only one date.Click on the search button and book your bus.