DRW and PHL are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. DRW to PHL refers to a flight route from Darwin Airport to Philadelphia Airport. Pittsburgh Airport (PIT), Harrisburg Airport (MDT), Allentown-Bethlehem Airport (ABE), Wilkes-Barre Scranton Airport (AVP), State College University Park Airport (SCE) are other airports near this flight route and their unique identifiers/IATA codes.