who is the largest travel agency in the world? What is their revenue?
how many trips they do each year

american express?

American Express
American Express Company is a global travel, financial and network
services provider. Founded in 1850, the Company serves individuals
with charge and credit cards, Travelers Cheques and other stored value
products. It also offers financial planning, brokerage services,
mutual funds, insurance and other investment products. Through its
family of Corporate Card services, American Express helps companies
and institutions manage their travel, entertainment and purchasing
expenses. As the world's largest travel agency, American Express
offers travel and related consulting services to individuals and
corporations around the globe.

reveneus

http://home3.americanexpress.com/corp/corpinfo/2q04.asp

am777-ga, 

Is that your final answer? I'm not sure if you are right or wrong, but
many companies claim to be the 'largest travel company in the world'.

Hi Ryan, 

It is my final answer...........( now I hope you wont hold it against
me if the answer turns out to be wrong........... )

Anne-Marie

According to the Guiness Book of records:

Largest Travel Agency
In terms of branches and staff numbers, the world?s largest travel
agency is the Japan Travel Bureau (JTB). Established in 1912, JTB
currently has 13,300 employees, 315 domestic branches, and 69 overseas
branches.

Revenue: ?

Trips each year: ?

Ref: http://www.guinnessworldrecords.com/content_pages/record.asp?recordid=53478

Does anyone really know as companies own many brands and things like
that so them all together might make them the biggest and so forth.

Be an interesting one to know :)