| Katy to Olivares | 4,988.67 mi (8,028.49 km) |
| Katy to Olivenza | 4,905.89 mi (7,895.27 km) |
| Katy to Olot | 5,256.84 mi (8,460.06 km) |
| Katy to Onate | 5,007.12 mi (8,058.19 km) |
| Katy to Onda | 5,199.57 mi (8,367.91 km) |
| Katy to Onteniente | 5,218.69 mi (8,398.67 km) |
| Katy to Orihuela | 5,225.23 mi (8,409.19 km) |
| Katy to Osuna | 5,046.40 mi (8,121.40 km) |
| Katy to Ourense | 4,771.93 mi (7,679.68 km) |
| Katy to Oviedo | 4,839.90 mi (7,789.07 km) |
| Katy to Paiporta | 5,208.87 mi (8,382.87 km) |
| Katy to Pajara | 4,820.97 mi (7,758.60 km) |
| Katy to Palafolls | 5,285.32 mi (8,505.90 km) |
| Katy to Palafrugell | 5,295.96 mi (8,523.03 km) |
| Katy to Palamos | 5,296.75 mi (8,524.30 km) |
