| Isabela to Olivares | 3,868.16 mi (6,225.20 km) |
| Isabela to Olivenza | 3,820.62 mi (6,148.70 km) |
| Isabela to Olot | 4,330.46 mi (6,969.20 km) |
| Isabela to Onate | 4,082.22 mi (6,569.69 km) |
| Isabela to Onda | 4,188.34 mi (6,740.49 km) |
| Isabela to Onteniente | 4,170.56 mi (6,711.87 km) |
| Isabela to Orihuela | 4,152.82 mi (6,683.32 km) |
| Isabela to Osuna | 3,925.48 mi (6,317.45 km) |
| Isabela to Ourense | 3,802.58 mi (6,119.67 km) |
| Isabela to Oviedo | 3,911.78 mi (6,295.39 km) |
| Isabela to Paiporta | 4,180.32 mi (6,727.57 km) |
| Isabela to Pajara | 3,397.18 mi (5,467.24 km) |
| Isabela to Palafolls | 4,344.52 mi (6,991.84 km) |
| Isabela to Palafrugell | 4,365.38 mi (7,025.40 km) |
| Isabela to Palamos | 4,363.74 mi (7,022.76 km) |
