| Since there are multiple airports in Houston, Dallas, Chicago, Washington (DC) and the New York City area, I would suggest accepting the IATA codes only for all of the answers. This would make the quiz more challenging. (Otherwise, you could type in random major US cities.) As gowhere mention, Delta & Northwest have merged so maybe combine the two (Delta-NW). Also do the same with United & Continental Airlines since within the last month or so the merger was approved by all (FAA, shareholders, etc). Continental will be absorbed into United and cease to exist. |