| Nidda to Navodari | 1,005.36 mi (1,617.97 km) |
| Nidda to Negresti-Oas | 673.64 mi (1,084.12 km) |
| Nidda to Nehoiu | 871.71 mi (1,402.88 km) |
| Nidda to Ocna Mures | 734.14 mi (1,181.48 km) |
| Nidda to Odobesti | 890.28 mi (1,432.77 km) |
| Nidda to Odorheiu Secuiesc | 797.71 mi (1,283.79 km) |
| Nidda to Oltenita | 931.94 mi (1,499.81 km) |
| Nidda to Onesti | 862.22 mi (1,387.61 km) |
| Nidda to Oradea | 630.93 mi (1,015.38 km) |
| Nidda to Orastie | 724.81 mi (1,166.46 km) |
| Nidda to Oravita | 694.93 mi (1,118.39 km) |
| Nidda to Orsova | 735.83 mi (1,184.20 km) |
| Nidda to Otelu Rosu | 702.42 mi (1,130.43 km) |
| Nidda to Otopeni | 890.88 mi (1,433.74 km) |
| Nidda to Ovidiu | 1,004.98 mi (1,617.35 km) |
