Pittsburgh International Airport (PIT)

The Port Authority of Allegheny County provides bus service
from the airport using line 28X (Airport Flyer) with service to
downtown, Duquesne University, University of Pittsburgh,
Carnegie Mellon University, and the Oakland neighborhood.  
Cost is $3.75 and departs about every 30 minutes
from about 5:30am to around midnight daily.  
Transfers are
$1.00.  Bus departs from lower level, outside door 6.  
Web site
www.portauthority.org or call 412-442-2000.

Updated May 6, 2013
The Most Comprehensive Database of Airport Public Transportation on the Web