Book in Time.com
The local telephone numbers and addresses of airlines flying to Prague.
http://www.bookintime.com/index.php?site=27

CSA Czech Airlines
The national carrier.
http://www.csa.cz/

CzechSite Travel Guide
A long list of airlines operating out of Ruzyne Airport.
http://www.czechsite.com/gettingthere.html

Czech.cz
Lists the town office details of airlines serving Prague.
http://www.czech.cz/index.php?section=1&menu=21

Expatcities.com
Details of airline offices in Prague.
http://expatcities.com/cz/airline_cz.htm

Frommer's
The contact details of major airlines at Ruzyne Airport.
http://www.frommers.com/destinations/prague/0063020009.html