| Monroe to Nuth | 4,829.64 mi (7,772.55 km) |
| Monroe to Oegstgeest | 4,736.10 mi (7,622.02 km) |
| Monroe to Oirschot | 4,788.88 mi (7,706.95 km) |
| Monroe to Oisterwijk | 4,782.46 mi (7,696.62 km) |
| Monroe to Oldebroek | 4,782.23 mi (7,696.25 km) |
| Monroe to Oldenzaal | 4,825.21 mi (7,765.43 km) |
| Monroe to Ommen | 4,799.53 mi (7,724.10 km) |
| Monroe to Oosterend | 4,771.27 mi (7,678.61 km) |
| Monroe to Oosterhout | 4,767.44 mi (7,672.45 km) |
| Monroe to Oosterwolde | 4,780.04 mi (7,692.73 km) |
| Monroe to Oostzaan | 4,744.38 mi (7,635.33 km) |
| Monroe to Opmeer | 4,738.81 mi (7,626.38 km) |
| Monroe to Oss | 4,788.91 mi (7,707.01 km) |
| Monroe to Oud-Beijerland | 4,744.60 mi (7,635.70 km) |
| Monroe to Oudenbosch | 4,756.26 mi (7,654.46 km) |
