| Odorheiu Secuiesc to Olivenza | 1,718.90 mi (2,766.29 km) |
| Odorheiu Secuiesc to Olot | 1,160.15 mi (1,867.07 km) |
| Odorheiu Secuiesc to Onate | 1,373.38 mi (2,210.24 km) |
| Odorheiu Secuiesc to Onda | 1,354.56 mi (2,179.96 km) |
| Odorheiu Secuiesc to Onteniente | 1,408.43 mi (2,266.65 km) |
| Odorheiu Secuiesc to Orihuela | 1,450.23 mi (2,333.92 km) |
| Odorheiu Secuiesc to Osuna | 1,674.65 mi (2,695.09 km) |
| Odorheiu Secuiesc to Ourense | 1,649.72 mi (2,654.97 km) |
| Odorheiu Secuiesc to Oviedo | 1,529.58 mi (2,461.62 km) |
| Odorheiu Secuiesc to Paiporta | 1,379.14 mi (2,219.50 km) |
| Odorheiu Secuiesc to Pajara | 2,459.78 mi (3,958.63 km) |
| Odorheiu Secuiesc to Palafolls | 1,161.51 mi (1,869.28 km) |
| Odorheiu Secuiesc to Palafrugell | 1,135.21 mi (1,826.94 km) |
| Odorheiu Secuiesc to Palamos | 1,138.77 mi (1,832.67 km) |
| Odorheiu Secuiesc to Palencia | 1,498.87 mi (2,412.19 km) |
