| Bad Mergentheim to Oestrich-Winkel | 86.10 mi (138.57 km) |
| Bad Mergentheim to Offenburg | 109.58 mi (176.35 km) |
| Bad Mergentheim to Oftersheim | 53.86 mi (86.67 km) |
| Bad Mergentheim to Ohrdruf | 101.23 mi (162.92 km) |
| Bad Mergentheim to Ohringen | 23.95 mi (38.55 km) |
| Bad Mergentheim to Olbernhau | 177.46 mi (285.60 km) |
| Bad Mergentheim to Olching | 114.16 mi (183.73 km) |
| Bad Mergentheim to Oldenburg | 260.53 mi (419.28 km) |
| Bad Mergentheim to Oldenburg in Holstein | 335.04 mi (539.19 km) |
| Bad Mergentheim to Olfen | 185.39 mi (298.36 km) |
| Bad Mergentheim to Olpe | 135.18 mi (217.55 km) |
| Bad Mergentheim to Olsberg | 139.74 mi (224.90 km) |
| Bad Mergentheim to Oranienburg | 270.49 mi (435.31 km) |
| Bad Mergentheim to Ortenberg | 67.06 mi (107.93 km) |
| Bad Mergentheim to Oschatz | 192.62 mi (310.00 km) |
