| Trancoso to Oerlinghausen | 1,081.69 mi (1,740.81 km) |
| Trancoso to Oestrich-Winkel | 976.57 mi (1,571.63 km) |
| Trancoso to Offenburg | 917.43 mi (1,476.47 km) |
| Trancoso to Oftersheim | 974.67 mi (1,568.58 km) |
| Trancoso to Ohrdruf | 1,108.54 mi (1,784.03 km) |
| Trancoso to Ohringen | 1,004.37 mi (1,616.38 km) |
| Trancoso to Olbernhau | 1,202.41 mi (1,935.09 km) |
| Trancoso to Olching | 1,049.18 mi (1,688.49 km) |
| Trancoso to Oldenburg | 1,121.12 mi (1,804.26 km) |
| Trancoso to Oldenburg in Holstein | 1,255.66 mi (2,020.79 km) |
| Trancoso to Olfen | 1,028.75 mi (1,655.62 km) |
| Trancoso to Olpe | 1,012.60 mi (1,629.62 km) |
| Trancoso to Olsberg | 1,048.96 mi (1,688.14 km) |
| Trancoso to Oranienburg | 1,269.92 mi (2,043.75 km) |
| Trancoso to Ortenberg | 1,029.00 mi (1,656.01 km) |
