| Monrovia to Olivares | 5,834.91 mi (9,390.39 km) |
| Monrovia to Olivenza | 5,739.42 mi (9,236.70 km) |
| Monrovia to Olot | 5,956.61 mi (9,586.24 km) |
| Monrovia to Onate | 5,733.67 mi (9,227.46 km) |
| Monrovia to Onda | 5,958.44 mi (9,589.19 km) |
| Monrovia to Onteniente | 5,998.40 mi (9,653.49 km) |
| Monrovia to Orihuela | 6,019.27 mi (9,687.07 km) |
| Monrovia to Osuna | 5,887.35 mi (9,474.77 km) |
| Monrovia to Ourense | 5,551.24 mi (8,933.86 km) |
| Monrovia to Oviedo | 5,587.15 mi (8,991.65 km) |
| Monrovia to Paiporta | 5,977.49 mi (9,619.84 km) |
| Monrovia to Pajara | 5,854.33 mi (9,421.63 km) |
| Monrovia to Palafolls | 5,991.04 mi (9,641.65 km) |
| Monrovia to Palafrugell | 5,994.08 mi (9,646.54 km) |
| Monrovia to Palamos | 5,996.32 mi (9,650.14 km) |
