| Saarlouis to Navodari | 1,085.27 mi (1,746.57 km) |
| Saarlouis to Negresti-Oas | 766.92 mi (1,234.23 km) |
| Saarlouis to Nehoiu | 952.64 mi (1,533.12 km) |
| Saarlouis to Ocna Mures | 816.69 mi (1,314.33 km) |
| Saarlouis to Odobesti | 975.53 mi (1,569.97 km) |
| Saarlouis to Odorheiu Secuiesc | 882.95 mi (1,420.97 km) |
| Saarlouis to Oltenita | 1,005.53 mi (1,618.25 km) |
| Saarlouis to Onesti | 950.02 mi (1,528.90 km) |
| Saarlouis to Oradea | 714.43 mi (1,149.77 km) |
| Saarlouis to Orastie | 801.31 mi (1,289.58 km) |
| Saarlouis to Oravita | 759.45 mi (1,222.22 km) |
| Saarlouis to Orsova | 800.42 mi (1,288.15 km) |
| Saarlouis to Otelu Rosu | 773.50 mi (1,244.83 km) |
| Saarlouis to Otopeni | 965.92 mi (1,554.50 km) |
| Saarlouis to Ovidiu | 1,084.48 mi (1,745.29 km) |
