| Trondheim to Oerlinghausen | 794.51 mi (1,278.63 km) |
| Trondheim to Oestrich-Winkel | 932.17 mi (1,500.18 km) |
| Trondheim to Offenburg | 1,038.03 mi (1,670.54 km) |
| Trondheim to Oftersheim | 973.75 mi (1,567.10 km) |
| Trondheim to Ohrdruf | 870.78 mi (1,401.38 km) |
| Trondheim to Ohringen | 983.75 mi (1,583.19 km) |
| Trondheim to Olbernhau | 888.50 mi (1,429.90 km) |
| Trondheim to Olching | 1,052.85 mi (1,694.40 km) |
| Trondheim to Oldenburg | 714.97 mi (1,150.63 km) |
| Trondheim to Oldenburg in Holstein | 631.04 mi (1,015.56 km) |
| Trondheim to Olfen | 816.71 mi (1,314.37 km) |
| Trondheim to Olpe | 862.81 mi (1,388.56 km) |
| Trondheim to Olsberg | 837.56 mi (1,347.92 km) |
| Trondheim to Oranienburg | 744.68 mi (1,198.45 km) |
| Trondheim to Ortenberg | 904.68 mi (1,455.94 km) |
