| Thornton to Oerlinghausen | 455.79 mi (733.53 km) |
| Thornton to Oestrich-Winkel | 494.29 mi (795.48 km) |
| Thornton to Offenburg | 560.58 mi (902.17 km) |
| Thornton to Oftersheim | 541.35 mi (871.21 km) |
| Thornton to Ohrdruf | 568.63 mi (915.13 km) |
| Thornton to Ohringen | 581.16 mi (935.29 km) |
| Thornton to Olbernhau | 676.28 mi (1,088.37 km) |
| Thornton to Olching | 688.99 mi (1,108.82 km) |
| Thornton to Oldenburg | 415.99 mi (669.47 km) |
| Thornton to Oldenburg in Holstein | 517.08 mi (832.16 km) |
| Thornton to Olfen | 411.48 mi (662.21 km) |
| Thornton to Olpe | 450.44 mi (724.91 km) |
| Thornton to Olsberg | 465.02 mi (748.37 km) |
| Thornton to Oranienburg | 626.28 mi (1,007.89 km) |
| Thornton to Ortenberg | 519.64 mi (836.27 km) |
