Great question - RAP to VCE just means Rapid City Airport to Venice Marco Polo Airport. Now you’ll know what these unique codes when you look for flights! Rome Fiumicino Airport (FCO), Naples Airport (NAP), Milan Malpensa Airport (MXP), Catania Fontanarossa Airport (CTA), Bologna Guglielmo Marconi Airport (BLQ) are some additional IATA codes for airports related to your trip.