| Ponca City to Idar-Oberstein | 4,898.00 mi (7,882.56 km) |
| Ponca City to Idstein | 4,912.83 mi (7,906.43 km) |
| Ponca City to Illertissen | 5,060.31 mi (8,143.78 km) |
| Ponca City to Illingen | 4,901.57 mi (7,888.32 km) |
| Ponca City to Ilmenau | 4,988.15 mi (8,027.64 km) |
| Ponca City to Ilsede | 4,897.81 mi (7,882.27 km) |
| Ponca City to Ilsenburg | 4,931.26 mi (7,936.09 km) |
| Ponca City to Ilsfeld | 4,995.47 mi (8,039.43 km) |
| Ponca City to Ilvesheim | 4,953.43 mi (7,971.77 km) |
| Ponca City to Immenstadt im Allgau | 5,092.27 mi (8,195.22 km) |
| Ponca City to Ingelheim | 4,914.72 mi (7,909.48 km) |
| Ponca City to Ingolstadt | 5,086.38 mi (8,185.73 km) |
| Ponca City to Iserlohn | 4,845.15 mi (7,797.51 km) |
| Ponca City to Isernhagen-Sud | 4,879.88 mi (7,853.41 km) |
| Ponca City to Ismaning | 5,118.04 mi (8,236.68 km) |
