| Tracy to Oerlinghausen | 5,550.35 mi (8,932.43 km) |
| Tracy to Oestrich-Winkel | 5,639.61 mi (9,076.08 km) |
| Tracy to Offenburg | 5,721.15 mi (9,207.30 km) |
| Tracy to Oftersheim | 5,689.98 mi (9,157.15 km) |
| Tracy to Ohrdruf | 5,666.80 mi (9,119.83 km) |
| Tracy to Ohringen | 5,724.38 mi (9,212.49 km) |
| Tracy to Olbernhau | 5,741.69 mi (9,240.35 km) |
| Tracy to Olching | 5,829.12 mi (9,381.07 km) |
| Tracy to Oldenburg | 5,474.59 mi (8,810.51 km) |
| Tracy to Oldenburg in Holstein | 5,477.45 mi (8,815.10 km) |
| Tracy to Olfen | 5,529.97 mi (8,899.62 km) |
| Tracy to Olpe | 5,579.90 mi (8,979.97 km) |
| Tracy to Olsberg | 5,579.16 mi (8,978.79 km) |
| Tracy to Oranienburg | 5,620.53 mi (9,045.38 km) |
| Tracy to Ortenberg | 5,648.78 mi (9,090.83 km) |
