| Cleveland to Oerlinghausen | 4,058.76 mi (6,531.95 km) |
| Cleveland to Oestrich-Winkel | 4,099.52 mi (6,597.54 km) |
| Cleveland to Offenburg | 4,149.55 mi (6,678.05 km) |
| Cleveland to Oftersheim | 4,143.79 mi (6,668.79 km) |
| Cleveland to Ohrdruf | 4,175.10 mi (6,719.17 km) |
| Cleveland to Ohringen | 4,185.34 mi (6,735.66 km) |
| Cleveland to Olbernhau | 4,277.93 mi (6,884.67 km) |
| Cleveland to Olching | 4,292.06 mi (6,907.40 km) |
| Cleveland to Oldenburg | 4,003.42 mi (6,442.89 km) |
| Cleveland to Oldenburg in Holstein | 4,061.44 mi (6,536.26 km) |
| Cleveland to Olfen | 4,018.83 mi (6,467.69 km) |
| Cleveland to Olpe | 4,058.95 mi (6,532.25 km) |
| Cleveland to Olsberg | 4,072.47 mi (6,554.01 km) |
| Cleveland to Oranienburg | 4,198.59 mi (6,756.99 km) |
| Cleveland to Ortenberg | 4,127.95 mi (6,643.30 km) |
