| Keystone to Nasaud | 5,536.34 mi (8,909.88 km) |
| Keystone to Navodari | 5,817.37 mi (9,362.14 km) |
| Keystone to Negresti-Oas | 5,476.28 mi (8,813.22 km) |
| Keystone to Nehoiu | 5,683.71 mi (9,147.04 km) |
| Keystone to Ocna Mures | 5,546.00 mi (8,925.42 km) |
| Keystone to Odobesti | 5,699.14 mi (9,171.88 km) |
| Keystone to Odorheiu Secuiesc | 5,607.43 mi (9,024.29 km) |
| Keystone to Oltenita | 5,744.83 mi (9,245.41 km) |
| Keystone to Onesti | 5,668.66 mi (9,122.83 km) |
| Keystone to Oradea | 5,442.93 mi (8,759.55 km) |
| Keystone to Orastie | 5,537.88 mi (8,912.36 km) |
| Keystone to Oravita | 5,502.43 mi (8,855.31 km) |
| Keystone to Orsova | 5,543.45 mi (8,921.32 km) |
| Keystone to Otelu Rosu | 5,514.12 mi (8,874.12 km) |
| Keystone to Otopeni | 5,703.94 mi (9,179.61 km) |
