| * Click on CENTER for graphical tier information | ||
| ZMP (ZMP 1) | ||
| FIRST TIER | ZAU / ZDV / ZKC / ZLC / ZOB / (Canadian .. CYYC) | |
| SECOND TIER | ZAB / ZBW / ZDC / ZFW / ZHD / ZLA / ZME / ZNY / ZOA / ZSE | |
| * Click on CENTER for graphical tier information | ||
| ZMP (ZMP 1) | ||
| FIRST TIER | ZAU / ZDV / ZKC / ZLC / ZOB / (Canadian .. CYYC) | |
| SECOND TIER | ZAB / ZBW / ZDC / ZFW / ZHD / ZLA / ZME / ZNY / ZOA / ZSE | |