| North Liberty to Oerlinghausen | 4,404.21 mi (7,087.90 km) |
| North Liberty to Oestrich-Winkel | 4,458.94 mi (7,175.98 km) |
| North Liberty to Offenburg | 4,518.33 mi (7,271.55 km) |
| North Liberty to Oftersheim | 4,505.55 mi (7,250.99 km) |
| North Liberty to Ohrdruf | 4,522.48 mi (7,278.23 km) |
| North Liberty to Ohringen | 4,545.78 mi (7,315.72 km) |
| North Liberty to Olbernhau | 4,619.40 mi (7,434.21 km) |
| North Liberty to Olching | 4,653.54 mi (7,489.15 km) |
| North Liberty to Oldenburg | 4,342.30 mi (6,988.26 km) |
| North Liberty to Oldenburg in Holstein | 4,386.13 mi (7,058.80 km) |
| North Liberty to Olfen | 4,369.01 mi (7,031.25 km) |
| North Liberty to Olpe | 4,412.48 mi (7,101.21 km) |
| North Liberty to Olsberg | 4,422.30 mi (7,117.00 km) |
| North Liberty to Oranienburg | 4,527.37 mi (7,286.10 km) |
| North Liberty to Ortenberg | 4,482.54 mi (7,213.95 km) |
