| Fort Thomas to Nuth | 4,207.14 mi (6,770.73 km) |
| Fort Thomas to Oegstgeest | 4,113.57 mi (6,620.16 km) |
| Fort Thomas to Oirschot | 4,166.35 mi (6,705.09 km) |
| Fort Thomas to Oisterwijk | 4,159.93 mi (6,694.75 km) |
| Fort Thomas to Oldebroek | 4,159.78 mi (6,694.51 km) |
| Fort Thomas to Oldenzaal | 4,202.80 mi (6,763.76 km) |
| Fort Thomas to Ommen | 4,177.13 mi (6,722.44 km) |
| Fort Thomas to Oosterend | 4,148.96 mi (6,677.11 km) |
| Fort Thomas to Oosterhout | 4,144.90 mi (6,670.58 km) |
| Fort Thomas to Oosterwolde | 4,157.75 mi (6,691.25 km) |
| Fort Thomas to Oostzaan | 4,121.88 mi (6,633.52 km) |
| Fort Thomas to Opmeer | 4,116.36 mi (6,624.64 km) |
| Fort Thomas to Oss | 4,166.38 mi (6,705.14 km) |
| Fort Thomas to Oud-Beijerland | 4,122.07 mi (6,633.83 km) |
| Fort Thomas to Oudenbosch | 4,133.73 mi (6,652.60 km) |
