| Lake Monticello to Olivares | 3,840.64 mi (6,180.92 km) |
| Lake Monticello to Olivenza | 3,757.87 mi (6,047.70 km) |
| Lake Monticello to Olot | 4,118.33 mi (6,627.81 km) |
| Lake Monticello to Onate | 3,866.57 mi (6,222.64 km) |
| Lake Monticello to Onda | 4,054.63 mi (6,525.30 km) |
| Lake Monticello to Onteniente | 4,072.18 mi (6,553.54 km) |
| Lake Monticello to Orihuela | 4,077.96 mi (6,562.84 km) |
| Lake Monticello to Osuna | 3,898.35 mi (6,273.79 km) |
| Lake Monticello to Ourense | 3,626.80 mi (5,836.77 km) |
| Lake Monticello to Oviedo | 3,697.74 mi (5,950.93 km) |
| Lake Monticello to Paiporta | 4,063.13 mi (6,538.98 km) |
| Lake Monticello to Pajara | 3,702.17 mi (5,958.06 km) |
| Lake Monticello to Palafolls | 4,145.80 mi (6,672.02 km) |
| Lake Monticello to Palafrugell | 4,157.43 mi (6,690.73 km) |
| Lake Monticello to Palamos | 4,158.01 mi (6,691.67 km) |
