| Troy to Nuth | 3,992.57 mi (6,425.41 km) |
| Troy to Oegstgeest | 3,897.12 mi (6,271.80 km) |
| Troy to Oirschot | 3,950.87 mi (6,358.31 km) |
| Troy to Oisterwijk | 3,944.33 mi (6,347.79 km) |
| Troy to Oldebroek | 3,941.67 mi (6,343.50 km) |
| Troy to Oldenzaal | 3,984.24 mi (6,412.01 km) |
| Troy to Ommen | 3,958.50 mi (6,370.58 km) |
| Troy to Oosterend | 3,929.49 mi (6,323.90 km) |
| Troy to Oosterhout | 3,929.43 mi (6,323.81 km) |
| Troy to Oosterwolde | 3,938.15 mi (6,337.84 km) |
| Troy to Oostzaan | 3,904.54 mi (6,283.75 km) |
| Troy to Opmeer | 3,898.36 mi (6,273.80 km) |
| Troy to Oss | 3,950.12 mi (6,357.10 km) |
| Troy to Oud-Beijerland | 3,906.53 mi (6,286.95 km) |
| Troy to Oudenbosch | 3,918.64 mi (6,306.44 km) |
