| Rockwall to Nuth | 4,975.25 mi (8,006.88 km) |
| Rockwall to Oegstgeest | 4,878.97 mi (7,851.95 km) |
| Rockwall to Oirschot | 4,933.17 mi (7,939.17 km) |
| Rockwall to Oisterwijk | 4,926.58 mi (7,928.57 km) |
| Rockwall to Oldebroek | 4,922.55 mi (7,922.08 km) |
| Rockwall to Oldenzaal | 4,964.81 mi (7,990.08 km) |
| Rockwall to Ommen | 4,939.04 mi (7,948.61 km) |
| Rockwall to Oosterend | 4,909.48 mi (7,901.04 km) |
| Rockwall to Oosterhout | 4,911.74 mi (7,904.69 km) |
| Rockwall to Oosterwolde | 4,918.04 mi (7,914.82 km) |
| Rockwall to Oostzaan | 4,885.91 mi (7,863.11 km) |
| Rockwall to Opmeer | 4,879.34 mi (7,852.54 km) |
| Rockwall to Oss | 4,932.04 mi (7,937.36 km) |
| Rockwall to Oud-Beijerland | 4,888.82 mi (7,867.80 km) |
| Rockwall to Oudenbosch | 4,901.13 mi (7,887.61 km) |
