| Harrow Weald to Nasaud | 1,144.92 mi (1,842.57 km) |
| Harrow Weald to Navodari | 1,419.50 mi (2,284.47 km) |
| Harrow Weald to Negresti-Oas | 1,086.79 mi (1,749.03 km) |
| Harrow Weald to Nehoiu | 1,285.90 mi (2,069.46 km) |
| Harrow Weald to Ocna Mures | 1,148.40 mi (1,848.17 km) |
| Harrow Weald to Odobesti | 1,304.59 mi (2,099.54 km) |
| Harrow Weald to Odorheiu Secuiesc | 1,212.04 mi (1,950.59 km) |
| Harrow Weald to Oltenita | 1,344.65 mi (2,164.00 km) |
| Harrow Weald to Onesti | 1,276.30 mi (2,054.01 km) |
| Harrow Weald to Oradea | 1,045.20 mi (1,682.08 km) |
| Harrow Weald to Orastie | 1,138.04 mi (1,831.50 km) |
| Harrow Weald to Oravita | 1,103.23 mi (1,775.48 km) |
| Harrow Weald to Orsova | 1,144.28 mi (1,841.54 km) |
| Harrow Weald to Otelu Rosu | 1,113.84 mi (1,792.55 km) |
| Harrow Weald to Otopeni | 1,303.97 mi (2,098.53 km) |
