| Ponca City to Nuth | 4,799.07 mi (7,723.35 km) |
| Ponca City to Oegstgeest | 4,700.50 mi (7,564.73 km) |
| Ponca City to Oirschot | 4,755.88 mi (7,653.84 km) |
| Ponca City to Oisterwijk | 4,749.14 mi (7,643.01 km) |
| Ponca City to Oldebroek | 4,741.61 mi (7,630.88 km) |
| Ponca City to Oldenzaal | 4,783.07 mi (7,697.61 km) |
| Ponca City to Ommen | 4,757.29 mi (7,656.12 km) |
| Ponca City to Oosterend | 4,726.64 mi (7,606.80 km) |
| Ponca City to Oosterhout | 4,734.52 mi (7,619.48 km) |
| Ponca City to Oosterwolde | 4,734.99 mi (7,620.23 km) |
| Ponca City to Oostzaan | 4,706.18 mi (7,573.86 km) |
| Ponca City to Opmeer | 4,698.70 mi (7,561.83 km) |
| Ponca City to Oss | 4,753.66 mi (7,650.27 km) |
| Ponca City to Oud-Beijerland | 4,711.59 mi (7,582.57 km) |
| Ponca City to Oudenbosch | 4,724.47 mi (7,603.30 km) |
