| Tondela to Oerlinghausen | 1,120.28 mi (1,802.92 km) |
| Tondela to Oestrich-Winkel | 1,016.61 mi (1,636.08 km) |
| Tondela to Offenburg | 958.65 mi (1,542.80 km) |
| Tondela to Oftersheim | 1,015.41 mi (1,634.15 km) |
| Tondela to Ohrdruf | 1,148.82 mi (1,848.85 km) |
| Tondela to Ohringen | 1,045.48 mi (1,682.54 km) |
| Tondela to Olbernhau | 1,243.40 mi (2,001.06 km) |
| Tondela to Olching | 1,091.17 mi (1,756.07 km) |
| Tondela to Oldenburg | 1,158.41 mi (1,864.29 km) |
| Tondela to Oldenburg in Holstein | 1,293.17 mi (2,081.16 km) |
| Tondela to Olfen | 1,066.97 mi (1,717.12 km) |
| Tondela to Olpe | 1,051.68 mi (1,692.51 km) |
| Tondela to Olsberg | 1,088.02 mi (1,751.01 km) |
| Tondela to Oranienburg | 1,309.49 mi (2,107.42 km) |
| Tondela to Ortenberg | 1,069.12 mi (1,720.58 km) |
