| Bon Air to Oerlinghausen | 4,091.63 mi (6,584.84 km) |
| Bon Air to Oestrich-Winkel | 4,118.55 mi (6,628.17 km) |
| Bon Air to Offenburg | 4,158.78 mi (6,692.90 km) |
| Bon Air to Oftersheim | 4,160.06 mi (6,694.97 km) |
| Bon Air to Ohrdruf | 4,204.90 mi (6,767.12 km) |
| Bon Air to Ohringen | 4,202.48 mi (6,763.24 km) |
| Bon Air to Olbernhau | 4,312.19 mi (6,939.81 km) |
| Bon Air to Olching | 4,307.07 mi (6,931.56 km) |
| Bon Air to Oldenburg | 4,043.02 mi (6,506.62 km) |
| Bon Air to Oldenburg in Holstein | 4,113.26 mi (6,619.65 km) |
| Bon Air to Olfen | 4,047.66 mi (6,514.07 km) |
| Bon Air to Olpe | 4,084.13 mi (6,572.77 km) |
| Bon Air to Olsberg | 4,101.04 mi (6,599.99 km) |
| Bon Air to Oranienburg | 4,245.27 mi (6,832.11 km) |
| Bon Air to Ortenberg | 4,151.37 mi (6,680.99 km) |
