| Gilbert to Olivares | 5,601.41 mi (9,014.60 km) |
| Gilbert to Olivenza | 5,508.68 mi (8,865.36 km) |
| Gilbert to Olot | 5,763.89 mi (9,276.08 km) |
| Gilbert to Onate | 5,531.81 mi (8,902.59 km) |
| Gilbert to Onda | 5,749.59 mi (9,253.07 km) |
| Gilbert to Onteniente | 5,784.17 mi (9,308.72 km) |
| Gilbert to Orihuela | 5,801.27 mi (9,336.25 km) |
| Gilbert to Osuna | 5,655.64 mi (9,101.88 km) |
| Gilbert to Ourense | 5,333.67 mi (8,583.72 km) |
| Gilbert to Oviedo | 5,378.49 mi (8,655.85 km) |
| Gilbert to Paiporta | 5,766.12 mi (9,279.68 km) |
| Gilbert to Pajara | 5,570.57 mi (8,964.96 km) |
| Gilbert to Palafolls | 5,796.98 mi (9,329.33 km) |
| Gilbert to Palafrugell | 5,802.12 mi (9,337.62 km) |
| Gilbert to Palamos | 5,803.99 mi (9,340.61 km) |
