| Union City to Olivares | 5,836.90 mi (9,393.59 km) |
| Union City to Olivenza | 5,738.81 mi (9,235.72 km) |
| Union City to Olot | 5,912.65 mi (9,515.50 km) |
| Union City to Onate | 5,700.90 mi (9,174.71 km) |
| Union City to Onda | 5,931.76 mi (9,546.25 km) |
| Union City to Onteniente | 5,977.39 mi (9,619.68 km) |
| Union City to Orihuela | 6,002.31 mi (9,659.78 km) |
| Union City to Osuna | 5,886.90 mi (9,474.05 km) |
| Union City to Ourense | 5,536.87 mi (8,910.74 km) |
| Union City to Oviedo | 5,562.71 mi (8,952.32 km) |
| Union City to Paiporta | 5,953.44 mi (9,581.14 km) |
| Union City to Pajara | 5,920.25 mi (9,527.72 km) |
| Union City to Palafolls | 5,948.27 mi (9,572.82 km) |
| Union City to Palafrugell | 5,949.08 mi (9,574.11 km) |
| Union City to Palamos | 5,951.70 mi (9,578.33 km) |
