| Big Spring to Olivares | 5,170.08 mi (8,320.44 km) |
| Big Spring to Olivenza | 5,082.47 mi (8,179.44 km) |
| Big Spring to Olot | 5,393.34 mi (8,679.75 km) |
| Big Spring to Onate | 5,149.88 mi (8,287.93 km) |
| Big Spring to Onda | 5,354.37 mi (8,617.03 km) |
| Big Spring to Onteniente | 5,380.33 mi (8,658.81 km) |
| Big Spring to Orihuela | 5,391.54 mi (8,676.84 km) |
| Big Spring to Osuna | 5,226.52 mi (8,411.28 km) |
| Big Spring to Ourense | 4,929.63 mi (7,933.47 km) |
| Big Spring to Oviedo | 4,987.79 mi (8,027.08 km) |
| Big Spring to Paiporta | 5,366.87 mi (8,637.15 km) |
| Big Spring to Pajara | 5,064.62 mi (8,150.72 km) |
| Big Spring to Palafolls | 5,423.96 mi (8,729.02 km) |
| Big Spring to Palafrugell | 5,432.30 mi (8,742.44 km) |
| Big Spring to Palamos | 5,433.56 mi (8,744.46 km) |
