| Frederick to Nuth | 3,913.52 mi (6,298.20 km) |
| Frederick to Oegstgeest | 3,823.82 mi (6,153.85 km) |
| Frederick to Oirschot | 3,874.55 mi (6,235.49 km) |
| Frederick to Oisterwijk | 3,868.38 mi (6,225.55 km) |
| Frederick to Oldebroek | 3,873.05 mi (6,233.07 km) |
| Frederick to Oldenzaal | 3,916.80 mi (6,303.47 km) |
| Frederick to Ommen | 3,891.36 mi (6,262.55 km) |
| Frederick to Oosterend | 3,865.00 mi (6,220.12 km) |
| Frederick to Oosterhout | 3,853.19 mi (6,201.11 km) |
| Frederick to Oosterwolde | 3,874.01 mi (6,234.62 km) |
| Frederick to Oostzaan | 3,833.79 mi (6,169.90 km) |
| Frederick to Opmeer | 3,829.59 mi (6,163.13 km) |
| Frederick to Oss | 3,876.06 mi (6,237.91 km) |
| Frederick to Oud-Beijerland | 3,830.57 mi (6,164.70 km) |
| Frederick to Oudenbosch | 3,841.36 mi (6,182.07 km) |
