| Penafiel to Oerlinghausen | 1,090.81 mi (1,755.48 km) |
| Penafiel to Oestrich-Winkel | 990.78 mi (1,594.51 km) |
| Penafiel to Offenburg | 936.79 mi (1,507.61 km) |
| Penafiel to Oftersheim | 991.73 mi (1,596.03 km) |
| Penafiel to Ohrdruf | 1,123.53 mi (1,808.15 km) |
| Penafiel to Ohringen | 1,023.08 mi (1,646.48 km) |
| Penafiel to Olbernhau | 1,220.38 mi (1,964.01 km) |
| Penafiel to Olching | 1,072.86 mi (1,726.61 km) |
| Penafiel to Oldenburg | 1,126.38 mi (1,812.73 km) |
| Penafiel to Oldenburg in Holstein | 1,261.42 mi (2,030.07 km) |
| Penafiel to Olfen | 1,036.75 mi (1,668.49 km) |
| Penafiel to Olpe | 1,023.36 mi (1,646.93 km) |
| Penafiel to Olsberg | 1,059.63 mi (1,705.30 km) |
| Penafiel to Oranienburg | 1,282.12 mi (2,063.37 km) |
| Penafiel to Ortenberg | 1,043.46 mi (1,679.29 km) |
