INV stands for Inverness Airport, while DFW stands for Dallas/Fort Worth Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Dallas Love Field Airport (DAL), Waco Airport (ACT), Tyler Pounds Field Airport (TYR), Dallas Addison Airport (ADS).