- Posts: 825
Looks to be passengers served. At least according to what I found on Google.
To qualify as a “mega airport,” the location must serve 33 million or more passengers per year, according to the survey. Large airports have 10 to 32.9 million passengers, while medium airports have 4.5 to 9.9 million
I wouldn’t have guessed a city so much bigger than Twin Cities would have an airport “smaller” than ours.
That is probably where being a Delta hub comes in, along with geographic location.