| Momchilgrad to Navodari | 251.46 mi (404.69 km) |
| Momchilgrad to Negresti-Oas | 448.54 mi (721.86 km) |
| Momchilgrad to Nehoiu | 267.65 mi (430.75 km) |
| Momchilgrad to Ocna Mures | 344.36 mi (554.20 km) |
| Momchilgrad to Odobesti | 303.89 mi (489.06 km) |
| Momchilgrad to Odorheiu Secuiesc | 330.36 mi (531.66 km) |
| Momchilgrad to Oltenita | 186.94 mi (300.85 km) |
| Momchilgrad to Onesti | 333.34 mi (536.47 km) |
| Momchilgrad to Oradea | 419.81 mi (675.62 km) |
| Momchilgrad to Orastie | 318.12 mi (511.96 km) |
| Momchilgrad to Oravita | 306.41 mi (493.12 km) |
| Momchilgrad to Orsova | 267.98 mi (431.28 km) |
| Momchilgrad to Otelu Rosu | 315.19 mi (507.25 km) |
| Momchilgrad to Otopeni | 211.03 mi (339.61 km) |
| Momchilgrad to Ovidiu | 247.07 mi (397.62 km) |
