| Brookings to Oerlinghausen | 4,447.14 mi (7,156.99 km) |
| Brookings to Oestrich-Winkel | 4,512.79 mi (7,262.64 km) |
| Brookings to Offenburg | 4,579.51 mi (7,370.02 km) |
| Brookings to Oftersheim | 4,560.96 mi (7,340.16 km) |
| Brookings to Ohrdruf | 4,565.97 mi (7,348.21 km) |
| Brookings to Ohringen | 4,599.75 mi (7,402.58 km) |
| Brookings to Olbernhau | 4,657.32 mi (7,495.23 km) |
| Brookings to Olching | 4,707.53 mi (7,576.04 km) |
| Brookings to Oldenburg | 4,380.53 mi (7,049.78 km) |
| Brookings to Oldenburg in Holstein | 4,412.87 mi (7,101.82 km) |
| Brookings to Olfen | 4,416.07 mi (7,106.97 km) |
| Brookings to Olpe | 4,461.88 mi (7,180.71 km) |
| Brookings to Olsberg | 4,468.60 mi (7,191.52 km) |
| Brookings to Oranienburg | 4,556.03 mi (7,332.23 km) |
| Brookings to Ortenberg | 4,532.22 mi (7,293.90 km) |
