| New Carrollton to Nuth | 3,913.41 mi (6,298.03 km) |
| New Carrollton to Oegstgeest | 3,824.49 mi (6,154.91 km) |
| New Carrollton to Oirschot | 3,874.81 mi (6,235.90 km) |
| New Carrollton to Oisterwijk | 3,868.68 mi (6,226.04 km) |
| New Carrollton to Oldebroek | 3,874.23 mi (6,234.97 km) |
| New Carrollton to Oldenzaal | 3,918.08 mi (6,305.55 km) |
| New Carrollton to Ommen | 3,892.71 mi (6,264.71 km) |
| New Carrollton to Oosterend | 3,866.69 mi (6,222.83 km) |
| New Carrollton to Oosterhout | 3,853.47 mi (6,201.57 km) |
| New Carrollton to Oosterwolde | 3,875.73 mi (6,237.39 km) |
| New Carrollton to Oostzaan | 3,834.75 mi (6,171.44 km) |
| New Carrollton to Opmeer | 3,830.79 mi (6,165.06 km) |
| New Carrollton to Oss | 3,876.59 mi (6,238.76 km) |
| New Carrollton to Oud-Beijerland | 3,830.90 mi (6,165.24 km) |
| New Carrollton to Oudenbosch | 3,841.53 mi (6,182.34 km) |
