Antietam Travel Service, Inc., located in historic Frederick, MD, is a full service travel agency that has been providing expert travel service to both leisure and corporate clients since 1984. We pride ourselves in the professional level of personal service we provide through highly trained, knowledgeable travel consultants and the most advanced travel technology available. The travel consultants at Antietam Travel Service, Inc. will help you save time and money. Our professional, friendly service is the reason we are the largest travel agency in Frederick.