COMMERCIAL Travel Agencies:
These are agents that cater for business travelers, they specialize in tracking down deals for business travels to help companies manage travel cost.
ONLINE Travel Agencies
These are travel agencies that exist in cyberspace, they provide clients the convenience of online bookings and discount that are available to travel agencies
In some cases they offer both online bookings and walk-in services.
NICHE Travel Agencies
They provide clients with specialized knowledge of a region, which helps to enhance the experience within the time of travel.