The new Amazon HQ thread got me thinking - does anyone know the process required to become an international airport and the likelihood of it ever happening at Will Rogers? While I'm sure infrastructure changes would be necessary (longer/stronger runway(s), customs, etc.), are there also significant regulatory, political, and/or market hindrances that make this even more unlikely, especially for an airport that probably will never become much of a hub? For example, I doubt existing international airports are keen on any new competition and I can't really see the economics working for the airlines with DFW and other international hubs relatively close to OKC/Tulsa. However, I'm just curious whether this has ever been seriously considered by the city/state and the forces that could/would prevent it from happening, especially as there are, based on a very quick Google search, a number of smaller cities than OKC that have international airports.