Hi,
For reasons still unknown to me I spent half an hour of my day off creating a list of the largest hubs in the US on Riem. I hope it's correct.
Key: Ranking, Airport, Airline, Weekly departures
1. Houston Interncontinental - Houston International (8708 departures)
2. Los Angeles International - Fly Los Airways (7605)
3. Jackson, MS - America Worldwide (6714)
4. Nashville - Eastern Link (6195)
5. Atlanta Hartsfield-Jackson International - Houston International (6148)
6. New York-JFK - Shamiym International Airlines (5167)
7. Dallas-Fort Worth - Eastern Link (4858)
8. Denver International - Eastern Link (4725)
9. Chicago O'Hare - Xara Air (4533)
10. Miami International - South Central Airlines (4226)
11. Chicago O'Hare - Eastern Link (3780)
12. Chicago Midway - Air Chicago (3735)
13. Tampa International - Air Chicago (3429)
14. Orlando International - Fly Los Airways (3344)
15. Buffalo Niagra International - America Worlwide (3331)
16. Minneapolis-St. Paul - South Central Airlines (2804)
17. Washington Dulles - Eastern Link (2730)
18. San Francisco International - Shamiym International Airlines (2343)
19. Detroit Wayne County - Eastern Link (2296)
20. Dallas Fort Worth - Shamiym International Airlines (1933)