<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Spiff:
Isn't the airport code for the Dallas area QDF? </font>
Common misconception. QDF is a CRS system "pseudocode" that searches all Metroplex area airports since there is scheduled commercial service at both DAL and DFW. Similarly with QHO and Houston. MKC doesn't need this "pseudocode" because the only scheduled commercial service is into MCI.
In truth, QDF is the IATA code for Conselheiro Lafaiete in Brazil.