| Sumner to Nasaud | 5,604.66 mi (9,019.83 km) |
| Sumner to Navodari | 5,867.87 mi (9,443.42 km) |
| Sumner to Negresti-Oas | 5,549.70 mi (8,931.39 km) |
| Sumner to Nehoiu | 5,761.97 mi (9,272.99 km) |
| Sumner to Ocna Mures | 5,651.91 mi (9,095.87 km) |
| Sumner to Odobesti | 5,748.24 mi (9,250.90 km) |
| Sumner to Odorheiu Secuiesc | 5,682.60 mi (9,145.25 km) |
| Sumner to Oltenita | 5,849.56 mi (9,413.95 km) |
| Sumner to Onesti | 5,711.41 mi (9,191.62 km) |
| Sumner to Oradea | 5,572.49 mi (8,968.06 km) |
| Sumner to Orastie | 5,674.13 mi (9,131.64 km) |
| Sumner to Oravita | 5,696.40 mi (9,167.47 km) |
| Sumner to Orsova | 5,730.26 mi (9,221.97 km) |
| Sumner to Otelu Rosu | 5,679.11 mi (9,139.65 km) |
| Sumner to Otopeni | 5,809.67 mi (9,349.77 km) |
