| Ponca City to Nasaud | 5,600.57 mi (9,013.25 km) |
| Ponca City to Navodari | 5,888.23 mi (9,476.20 km) |
| Ponca City to Negresti-Oas | 5,539.62 mi (8,915.16 km) |
| Ponca City to Nehoiu | 5,759.85 mi (9,269.58 km) |
| Ponca City to Ocna Mures | 5,627.11 mi (9,055.96 km) |
| Ponca City to Odobesti | 5,763.38 mi (9,275.26 km) |
| Ponca City to Odorheiu Secuiesc | 5,678.31 mi (9,138.36 km) |
| Ponca City to Oltenita | 5,835.60 mi (9,391.48 km) |
| Ponca City to Onesti | 5,728.57 mi (9,219.24 km) |
| Ponca City to Oradea | 5,529.01 mi (8,898.08 km) |
| Ponca City to Orastie | 5,631.79 mi (9,063.49 km) |
| Ponca City to Oravita | 5,619.65 mi (9,043.95 km) |
| Ponca City to Orsova | 5,659.65 mi (9,108.33 km) |
| Ponca City to Otelu Rosu | 5,619.32 mi (9,043.42 km) |
| Ponca City to Otopeni | 5,793.06 mi (9,323.04 km) |
