Originally Posted by Elvis90

You can look it up in the Bureau of Transportation Statistics page under Origin or Destination and Analysis to the right side:

RITA | BTS | Transtats

Both the O & D numbers are the same, so I'll just put one number by each hub. These are 2012 numbers.

1. ATL 37,903,309 (a big O&D hub indeed)
2. LAX 21,587,577
3. MSP 13,780,655
4. SEA 13,483,773
5. DTW 13,019,248
6. JFK 11,137,787
7. LGA 11,055,451
8. SLC 8,758,590
9. MEM 3,130,415
10. CVG 2,631,616

and DFW (since I commute from there) 23,324,375

Others of interest -

ORD 25,207,513

and MCO (for T) 14,216,656

So there is still a strong O&D market to tap in MSP.