| Oliveira do Hospital to Oerlinghausen | 1,121.40 mi (1,804.72 km) |
| Oliveira do Hospital to Oestrich-Winkel | 1,016.35 mi (1,635.65 km) |
| Oliveira do Hospital to Offenburg | 956.95 mi (1,540.06 km) |
| Oliveira do Hospital to Oftersheim | 1,014.34 mi (1,632.43 km) |
| Oliveira do Hospital to Ohrdruf | 1,148.30 mi (1,848.00 km) |
| Oliveira do Hospital to Ohringen | 1,043.93 mi (1,680.05 km) |
| Oliveira do Hospital to Olbernhau | 1,242.00 mi (1,998.81 km) |
| Oliveira do Hospital to Olching | 1,088.16 mi (1,751.22 km) |
| Oliveira do Hospital to Oldenburg | 1,160.58 mi (1,867.77 km) |
| Oliveira do Hospital to Oldenburg in Holstein | 1,295.18 mi (2,084.39 km) |
| Oliveira do Hospital to Olfen | 1,068.41 mi (1,719.43 km) |
| Oliveira do Hospital to Olpe | 1,052.36 mi (1,693.62 km) |
| Oliveira do Hospital to Olsberg | 1,088.73 mi (1,752.13 km) |
| Oliveira do Hospital to Oranienburg | 1,309.71 mi (2,107.78 km) |
| Oliveira do Hospital to Ortenberg | 1,068.77 mi (1,720.02 km) |
