| Schwabisch Gmund to Navodari | 942.89 mi (1,517.43 km) |
| Schwabisch Gmund to Negresti-Oas | 628.22 mi (1,011.03 km) |
| Schwabisch Gmund to Nehoiu | 810.44 mi (1,304.28 km) |
| Schwabisch Gmund to Ocna Mures | 674.86 mi (1,086.08 km) |
| Schwabisch Gmund to Odobesti | 833.98 mi (1,342.17 km) |
| Schwabisch Gmund to Odorheiu Secuiesc | 741.52 mi (1,193.36 km) |
| Schwabisch Gmund to Oltenita | 862.91 mi (1,388.72 km) |
| Schwabisch Gmund to Onesti | 809.07 mi (1,302.07 km) |
| Schwabisch Gmund to Oradea | 572.98 mi (922.12 km) |
| Schwabisch Gmund to Orastie | 658.81 mi (1,060.25 km) |
| Schwabisch Gmund to Oravita | 617.23 mi (993.34 km) |
| Schwabisch Gmund to Orsova | 658.23 mi (1,059.33 km) |
| Schwabisch Gmund to Otelu Rosu | 630.89 mi (1,015.32 km) |
| Schwabisch Gmund to Otopeni | 823.31 mi (1,325.00 km) |
| Schwabisch Gmund to Ovidiu | 942.06 mi (1,516.10 km) |
