| Niles to Olivares | 4,180.42 mi (6,727.74 km) |
| Niles to Olivenza | 4,090.16 mi (6,582.48 km) |
| Niles to Olot | 4,385.27 mi (7,057.41 km) |
| Niles to Onate | 4,143.38 mi (6,668.12 km) |
| Niles to Onda | 4,351.14 mi (7,002.48 km) |
| Niles to Onteniente | 4,379.66 mi (7,048.39 km) |
| Niles to Orihuela | 4,392.89 mi (7,069.67 km) |
| Niles to Osuna | 4,235.84 mi (6,816.92 km) |
| Niles to Ourense | 3,928.38 mi (6,322.11 km) |
| Niles to Oviedo | 3,982.95 mi (6,409.93 km) |
| Niles to Paiporta | 4,364.78 mi (7,024.44 km) |
| Niles to Pajara | 4,139.73 mi (6,662.25 km) |
| Niles to Palafolls | 4,416.25 mi (7,107.27 km) |
| Niles to Palafrugell | 4,424.16 mi (7,120.01 km) |
| Niles to Palamos | 4,425.50 mi (7,122.15 km) |
