| Willoughby to Nasaud | 4,802.51 mi (7,728.89 km) |
| Willoughby to Navodari | 5,089.78 mi (8,191.21 km) |
| Willoughby to Negresti-Oas | 4,741.41 mi (7,630.57 km) |
| Willoughby to Nehoiu | 4,958.11 mi (7,979.31 km) |
| Willoughby to Ocna Mures | 4,822.21 mi (7,760.59 km) |
| Willoughby to Odobesti | 4,966.68 mi (7,993.11 km) |
| Willoughby to Odorheiu Secuiesc | 4,878.10 mi (7,850.54 km) |
| Willoughby to Oltenita | 5,028.48 mi (8,092.55 km) |
| Willoughby to Onesti | 4,933.43 mi (7,939.60 km) |
| Willoughby to Oradea | 4,721.25 mi (7,598.12 km) |
| Willoughby to Orastie | 4,821.72 mi (7,759.81 km) |
| Willoughby to Oravita | 4,800.33 mi (7,725.38 km) |
| Willoughby to Orsova | 4,841.05 mi (7,790.91 km) |
| Willoughby to Otelu Rosu | 4,804.66 mi (7,732.35 km) |
| Willoughby to Otopeni | 4,986.26 mi (8,024.62 km) |
