| Ponca City to Oerlinghausen | 4,857.40 mi (7,817.23 km) |
| Ponca City to Oestrich-Winkel | 4,911.67 mi (7,904.57 km) |
| Ponca City to Offenburg | 4,970.42 mi (7,999.11 km) |
| Ponca City to Oftersheim | 4,958.16 mi (7,979.38 km) |
| Ponca City to Ohrdruf | 4,975.65 mi (8,007.54 km) |
| Ponca City to Ohringen | 4,998.47 mi (8,044.26 km) |
| Ponca City to Olbernhau | 5,072.62 mi (8,163.59 km) |
| Ponca City to Olching | 5,106.20 mi (8,217.64 km) |
| Ponca City to Oldenburg | 4,795.51 mi (7,717.63 km) |
| Ponca City to Oldenburg in Holstein | 4,839.00 mi (7,787.62 km) |
| Ponca City to Olfen | 4,822.10 mi (7,760.42 km) |
| Ponca City to Olpe | 4,865.47 mi (7,830.21 km) |
| Ponca City to Olsberg | 4,875.40 mi (7,846.20 km) |
| Ponca City to Oranienburg | 4,980.36 mi (8,015.12 km) |
| Ponca City to Ortenberg | 4,935.50 mi (7,942.92 km) |
