| Central Falls to Oerlinghausen | 3,645.69 mi (5,867.17 km) |
| Central Falls to Oestrich-Winkel | 3,673.07 mi (5,911.24 km) |
| Central Falls to Offenburg | 3,714.10 mi (5,977.26 km) |
| Central Falls to Oftersheim | 3,714.78 mi (5,978.36 km) |
| Central Falls to Ohrdruf | 3,759.00 mi (6,049.53 km) |
| Central Falls to Ohringen | 3,757.15 mi (6,046.55 km) |
| Central Falls to Olbernhau | 3,866.25 mi (6,222.13 km) |
| Central Falls to Olching | 3,861.94 mi (6,215.19 km) |
| Central Falls to Oldenburg | 3,597.14 mi (5,789.04 km) |
| Central Falls to Oldenburg in Holstein | 3,667.91 mi (5,902.93 km) |
| Central Falls to Olfen | 3,601.77 mi (5,796.48 km) |
| Central Falls to Olpe | 3,638.35 mi (5,855.35 km) |
| Central Falls to Olsberg | 3,655.17 mi (5,882.42 km) |
| Central Falls to Oranienburg | 3,799.59 mi (6,114.85 km) |
| Central Falls to Ortenberg | 3,705.68 mi (5,963.71 km) |
