| Oliveira do Bairro to Orbetello | 1,026.67 mi (1,652.27 km) |
| Oliveira do Bairro to Oria | 1,367.77 mi (2,201.21 km) |
| Oliveira do Bairro to Oristano | 901.40 mi (1,450.67 km) |
| Oliveira do Bairro to Orta Nova | 1,261.12 mi (2,029.58 km) |
| Oliveira do Bairro to Orte | 1,086.51 mi (1,748.58 km) |
| Oliveira do Bairro to Ortona | 1,189.35 mi (1,914.08 km) |
| Oliveira do Bairro to Orvieto | 1,072.67 mi (1,726.30 km) |
| Oliveira do Bairro to Orzinuovi | 988.56 mi (1,590.94 km) |
| Oliveira do Bairro to Osimo | 1,143.72 mi (1,840.64 km) |
| Oliveira do Bairro to Ospitaletto | 997.68 mi (1,605.61 km) |
| Oliveira do Bairro to Ostuni | 1,362.85 mi (2,193.30 km) |
| Oliveira do Bairro to Ottaviano | 1,200.67 mi (1,932.29 km) |
| Oliveira do Bairro to Ovada | 915.63 mi (1,473.57 km) |
| Oliveira do Bairro to Ozieri | 917.40 mi (1,476.42 km) |
| Oliveira do Bairro to Paceco | 1,137.01 mi (1,829.84 km) |
