| Westbrook to Olivares | 3,313.73 mi (5,332.93 km) |
| Westbrook to Olivenza | 3,226.76 mi (5,192.97 km) |
| Westbrook to Olot | 3,561.26 mi (5,731.30 km) |
| Westbrook to Onate | 3,312.11 mi (5,330.32 km) |
| Westbrook to Onda | 3,507.91 mi (5,645.44 km) |
| Westbrook to Onteniente | 3,530.07 mi (5,681.09 km) |
| Westbrook to Orihuela | 3,539.18 mi (5,695.75 km) |
| Westbrook to Osuna | 3,370.33 mi (5,424.03 km) |
| Westbrook to Ourense | 3,081.02 mi (4,958.42 km) |
| Westbrook to Oviedo | 3,145.78 mi (5,062.65 km) |
| Westbrook to Paiporta | 3,518.52 mi (5,662.51 km) |
| Westbrook to Pajara | 3,249.98 mi (5,230.34 km) |
| Westbrook to Palafolls | 3,589.91 mi (5,777.41 km) |
| Westbrook to Palafrugell | 3,600.39 mi (5,794.26 km) |
| Westbrook to Palamos | 3,601.21 mi (5,795.58 km) |
