Spotting at Detroit airside is possible, but you need to find the right spot. The terminal ahs a lot of huge glass windows. Unfortunately, they are all covered with a dot pattern. Those windows can not be used for photography. The only windows I found that do not have these dots are between gate A76 and A78.
The dot pattern can be seen at the first photo. The other photos where all taken between gate A76 and A78.
 
These planes where spotted today.
| Registration | Airline | Type | C/N |
| N14562 | Continental Express - Expressjet | ERJ-145 | 145611 |
| N316NB | Northwest Airlines | A320 | 1249 |
| N320US | Northwest Airlines | A300 | 213 |
| N321US | Northwest Airlines | A320 | 262 |
| N331NB | Northwest Airlines | A319 | 1567 |
| N341NB | Northwest Airlines | A319 | 1738 |
| N346UA | United Airlines | B737 | 24250/1644 |
| N349NB | Northwest Airlines | A320 | 1815 |
| N355NB | Northwest Airlines | A319 | 1839 |
| N356NW | Northwest Airlines | A320 | 818 |
| N368NB | Northwest Airlines | A319 | 2039 |
| N402WN | Southwest Airilnes | B737 | 29814/811 |
| N421XJ | Northwest Airlink - Mesaba | S340 | 340B-421 |
| N424XJ | Northwest Airlink - Mesaba | S340 | 340B-424 |
| N433XJ | Northwest Airlink - Mesaba | S340 | 340B-433 |
| N441XJ | Northwest Airlink - Mesaba | S340 | 340B-441 |
| N462UA | United Airlines | A320 | 1272 |
| N502NK | Spirit | A319 | 2433 |
| N505NK | Spirit | A319 | 2485 |
| N508NK | Spirit | A319 | 1567 |
| N5114 | biz jet - AVN Air LLC | Gulfstream | 4016 |
| N515XJ | Northwest Jet Airlink - Mesaba | ARJ | E2333 |
| N51VL | biz jet | Learjet | 55-116 |
| N521US | Northwest Airlines | B757 | 23209/110 |
| N525US | Northwest Airlines | B757 | 23619/124 |
| N526US | Northwest Airlines | B757 | 23620/131 |
| N533XR | Northwest Jet Airlink - Mesaba | ARJ | E2367 |
| N606NW | Northwest Airlines | DC-9 | 47225/317 |
| N606NW | Northwest Airlines | DC-9 | 47225/317 |
| N609NW | Northwest Airlines | DC-9 | 47234/435 |
| N611NA | Northwest Airlines | DC-9 | 47435/540 |
| N622NW | Northwest Airlines | DC-9 | 47575/680 |
| N625AW | America West | A320 | 64 |
| N667UA | United Airlines | B767 | 29239/716 |
| N667US | Northwest Airlines | B747 | 24222/799 |
| N671MC | Northwest Airlines | DC-9 | 47660/810 |
| N689SW | Southwest Airlines | B737 | 23387/1163 |
| N706RG | American Eagle | ERJ-135 | 145194 |
| N759NW | Northwest Airlines | DC-9 | 47287/364 |
| N773NC | Northwest Airlines | DC-9 | 47775/888 |
| N775NC | Northwest Airlines | DC-9 | 47785/904 |
| N782NC | Northwest Airlines | DC-9 | 48107/936 |
| N823MD | US Airways Express - Republic Airlines | EMB-170 | 170-00044 |
| N830NK | Spirit | MD-82 | 49932/1756 |
| N8477R | Northwest Airlines | CRJ-200 | 7477 |
| N8492C | Northwest Jet Airlink - Pinnacle | CRJ-200 | 7492 |
| N8501F | Northwest Jet Airlink - Pinnacle | CRJ-200 | 7501 |
| N873SJ | Astar Air Cargo | DC-8 | 46091/519 |
| N8758D | Northwest Jet Airlink - Pinnacle | CRJ-440 | 7758 |
| N8923A | Northwest Jet Airlink - Pinnacle Airlines | CRJ-440 | 7923 |
| N8923E | Northwest Airlines | DC-9 | 45838/104 |
| N8933E | Northwest Airlines | DC-9 | 47142/232 |
| N8979E | Northwest Airlines | DC-9 | 47328/392 |
| N908FR | Frontier | A319 | 1759 |
| N958AT | AirTran Airways | B717 | 55020/5051 |