| Trentham to Oerlinghausen | 461.72 mi (743.07 km) |
| Trentham to Oestrich-Winkel | 483.41 mi (777.97 km) |
| Trentham to Offenburg | 540.30 mi (869.52 km) |
| Trentham to Oftersheim | 528.04 mi (849.80 km) |
| Trentham to Ohrdruf | 569.55 mi (916.60 km) |
| Trentham to Ohringen | 569.30 mi (916.19 km) |
| Trentham to Olbernhau | 680.33 mi (1,094.88 km) |
| Trentham to Olching | 676.39 mi (1,088.54 km) |
| Trentham to Oldenburg | 431.85 mi (694.99 km) |
| Trentham to Oldenburg in Holstein | 542.65 mi (873.30 km) |
| Trentham to Olfen | 412.90 mi (664.49 km) |
| Trentham to Olpe | 446.78 mi (719.02 km) |
| Trentham to Olsberg | 465.51 mi (749.16 km) |
| Trentham to Oranienburg | 642.47 mi (1,033.95 km) |
| Trentham to Ortenberg | 513.93 mi (827.10 km) |
