| Frauenfeld to Oerlinghausen | 305.34 mi (491.40 km) |
| Frauenfeld to Oestrich-Winkel | 174.16 mi (280.29 km) |
| Frauenfeld to Offenburg | 77.51 mi (124.75 km) |
| Frauenfeld to Oftersheim | 126.62 mi (203.77 km) |
| Frauenfeld to Ohrdruf | 241.12 mi (388.05 km) |
| Frauenfeld to Ohringen | 117.28 mi (188.75 km) |
| Frauenfeld to Olbernhau | 294.14 mi (473.38 km) |
| Frauenfeld to Olching | 120.66 mi (194.19 km) |
| Frauenfeld to Oldenburg | 387.68 mi (623.91 km) |
| Frauenfeld to Oldenburg in Holstein | 474.26 mi (763.25 km) |
| Frauenfeld to Olfen | 295.77 mi (475.99 km) |
| Frauenfeld to Olpe | 244.30 mi (393.16 km) |
| Frauenfeld to Olsberg | 263.22 mi (423.61 km) |
| Frauenfeld to Oranienburg | 407.46 mi (655.74 km) |
| Frauenfeld to Ortenberg | 193.99 mi (312.20 km) |
