| Elk City to Oerlinghausen | 5,011.82 mi (8,065.74 km) |
| Elk City to Oestrich-Winkel | 5,067.55 mi (8,155.44 km) |
| Elk City to Offenburg | 5,127.20 mi (8,251.44 km) |
| Elk City to Oftersheim | 5,114.25 mi (8,230.59 km) |
| Elk City to Ohrdruf | 5,130.20 mi (8,256.26 km) |
| Elk City to Ohringen | 5,154.41 mi (8,295.22 km) |
| Elk City to Olbernhau | 5,226.42 mi (8,411.10 km) |
| Elk City to Olching | 5,262.19 mi (8,468.68 km) |
| Elk City to Oldenburg | 4,949.23 mi (7,965.02 km) |
| Elk City to Oldenburg in Holstein | 4,990.97 mi (8,032.20 km) |
| Elk City to Olfen | 4,977.06 mi (8,009.81 km) |
| Elk City to Olpe | 5,020.76 mi (8,080.13 km) |
| Elk City to Olsberg | 5,030.29 mi (8,095.47 km) |
| Elk City to Oranienburg | 5,132.71 mi (8,260.29 km) |
| Elk City to Ortenberg | 5,090.86 mi (8,192.95 km) |
