| Monroe to Olivares | 4,700.10 mi (7,564.08 km) |
| Monroe to Olivenza | 4,616.72 mi (7,429.89 km) |
| Monroe to Olot | 4,965.51 mi (7,991.21 km) |
| Monroe to Onate | 4,715.86 mi (7,589.44 km) |
| Monroe to Onda | 4,908.75 mi (7,899.87 km) |
| Monroe to Onteniente | 4,928.28 mi (7,931.30 km) |
| Monroe to Orihuela | 4,935.18 mi (7,942.40 km) |
| Monroe to Osuna | 4,757.69 mi (7,656.77 km) |
| Monroe to Ourense | 4,481.17 mi (7,211.75 km) |
| Monroe to Oviedo | 4,548.74 mi (7,320.49 km) |
| Monroe to Paiporta | 4,918.22 mi (7,915.12 km) |
| Monroe to Pajara | 4,546.68 mi (7,317.18 km) |
| Monroe to Palafolls | 4,994.01 mi (8,037.08 km) |
| Monroe to Palafrugell | 5,004.64 mi (8,054.18 km) |
| Monroe to Palamos | 5,005.43 mi (8,055.46 km) |
