| Mentor to Olivares | 3,885.60 mi (6,253.27 km) |
| Mentor to Olivenza | 3,797.68 mi (6,111.78 km) |
| Mentor to Olot | 4,117.55 mi (6,626.56 km) |
| Mentor to Onate | 3,871.20 mi (6,230.09 km) |
| Mentor to Onda | 4,072.05 mi (6,553.33 km) |
| Mentor to Onteniente | 4,096.60 mi (6,592.85 km) |
| Mentor to Orihuela | 4,107.17 mi (6,609.85 km) |
| Mentor to Osuna | 3,941.91 mi (6,343.89 km) |
| Mentor to Ourense | 3,646.35 mi (5,868.23 km) |
| Mentor to Oviedo | 3,707.14 mi (5,966.06 km) |
| Mentor to Paiporta | 4,083.82 mi (6,572.27 km) |
| Mentor to Pajara | 3,816.84 mi (6,142.61 km) |
| Mentor to Palafolls | 4,147.24 mi (6,674.34 km) |
| Mentor to Palafrugell | 4,156.63 mi (6,689.45 km) |
| Mentor to Palamos | 4,157.67 mi (6,691.12 km) |
