| Boone to Nasaud | 5,084.62 mi (8,182.90 km) |
| Boone to Navodari | 5,370.00 mi (8,642.18 km) |
| Boone to Negresti-Oas | 5,023.80 mi (8,085.02 km) |
| Boone to Nehoiu | 5,237.10 mi (8,428.29 km) |
| Boone to Ocna Mures | 5,100.01 mi (8,207.67 km) |
| Boone to Odobesti | 5,248.66 mi (8,446.90 km) |
| Boone to Odorheiu Secuiesc | 5,158.47 mi (8,301.75 km) |
| Boone to Oltenita | 5,303.68 mi (8,535.44 km) |
| Boone to Onesti | 5,216.52 mi (8,395.18 km) |
| Boone to Oradea | 4,997.83 mi (8,043.23 km) |
| Boone to Orastie | 5,096.21 mi (8,201.56 km) |
| Boone to Oravita | 5,068.66 mi (8,157.22 km) |
| Boone to Orsova | 5,109.64 mi (8,223.17 km) |
| Boone to Otelu Rosu | 5,076.19 mi (8,169.35 km) |
| Boone to Otopeni | 5,261.91 mi (8,468.22 km) |
