http://www.gocatholictravel.com/ – Catholic Travel Centre (CTC) caters to the needs of religious group travel organizers, including parish priests, sisters, brothers, deacons, and lay leaders alike.
http://thecatholictour.com/ – The Catholic Tour Company began business in 2003. The Catholic Tour is the Official Tour Operator for the French Government Tourist Office on Catholic Pilgrimages to France.
http://www.regina-tours.com/ – Regina Tours has been a leader in Catholic pilgrimages since 1985. They follow the teachings of the Scriptures when developing our pilgrimages. These tours we offer are designed for spiritual growth, renewal, healing and sharing our faith with others.
http://www.bluehearttravel.com/ – Catholic tours for pilgrims, tour leaders, travel agent and pilgrimage groups to Catholic shrines throughout the Europe
http://www.globusfaith.com/ – For more than 50 years, Cosmos has offered value-minded travelers the most affordable travel packages to fascinating places. A Cosmos faith-based tour is perfect for savvy, value-minded travelers seeking a unique spiritual experience. With Cosmos, you’ll enjoy the benefits, security, and convenience of escorted travel,
http://www.unitours.com/ – Unitours is an international group tour operator founded in 1957, headquartered in Port Chester, NY
For tips on how to choose a good travel guide read http://www.thecatholictravelguide.com/ChoosingaCatholicTourCompany.html