| Groves to Nasaud | 5,870.08 mi (9,446.98 km) |
| Groves to Navodari | 6,157.39 mi (9,909.36 km) |
| Groves to Negresti-Oas | 5,808.98 mi (9,348.65 km) |
| Groves to Nehoiu | 6,025.74 mi (9,697.50 km) |
| Groves to Ocna Mures | 5,889.81 mi (9,478.74 km) |
| Groves to Odobesti | 6,034.25 mi (9,711.18 km) |
| Groves to Odorheiu Secuiesc | 5,945.72 mi (9,568.70 km) |
| Groves to Oltenita | 6,095.99 mi (9,810.55 km) |
| Groves to Onesti | 6,000.94 mi (9,657.58 km) |
| Groves to Oradea | 5,788.80 mi (9,316.18 km) |
| Groves to Orastie | 5,889.16 mi (9,477.68 km) |
| Groves to Oravita | 5,867.00 mi (9,442.02 km) |
| Groves to Orsova | 5,907.77 mi (9,507.64 km) |
| Groves to Otelu Rosu | 5,871.80 mi (9,449.74 km) |
| Groves to Otopeni | 6,053.80 mi (9,742.65 km) |
