| Vila Real de Santo Antonio to Oerlinghausen | 1,285.53 mi (2,068.86 km) |
| Vila Real de Santo Antonio to Oestrich-Winkel | 1,169.17 mi (1,881.60 km) |
| Vila Real de Santo Antonio to Offenburg | 1,096.76 mi (1,765.06 km) |
| Vila Real de Santo Antonio to Oftersheim | 1,159.58 mi (1,866.16 km) |
| Vila Real de Santo Antonio to Ohrdruf | 1,297.24 mi (2,087.70 km) |
| Vila Real de Santo Antonio to Ohringen | 1,184.03 mi (1,905.51 km) |
| Vila Real de Santo Antonio to Olbernhau | 1,381.40 mi (2,223.15 km) |
| Vila Real de Santo Antonio to Olching | 1,212.23 mi (1,950.90 km) |
| Vila Real de Santo Antonio to Oldenburg | 1,333.10 mi (2,145.42 km) |
| Vila Real de Santo Antonio to Oldenburg in Holstein | 1,465.53 mi (2,358.55 km) |
| Vila Real de Santo Antonio to Olfen | 1,235.72 mi (1,988.69 km) |
| Vila Real de Santo Antonio to Olpe | 1,213.36 mi (1,952.72 km) |
| Vila Real de Santo Antonio to Olsberg | 1,249.51 mi (2,010.89 km) |
| Vila Real de Santo Antonio to Oranienburg | 1,464.34 mi (2,356.62 km) |
| Vila Real de Santo Antonio to Ortenberg | 1,220.18 mi (1,963.70 km) |
