Apex Bus // 202-408-8200, apexbus.com
Golden Ring Travel // 410-391-8700, goldenringtravel.com
Greyhound // 410-752-7682; greyhound.com
Hunt Valley Motor Coach // 410-584-7377, huntvalleymotorcoach.com
Peter Pan Bus Lines // 800-343-9999, peterpanbus.com
Superior Tours // 410-602-1704, superiortours.net