| Gebze to Olivares | 1,908.81 mi (3,071.93 km) |
| Gebze to Olivenza | 1,932.41 mi (3,109.91 km) |
| Gebze to Olot | 1,391.96 mi (2,240.15 km) |
| Gebze to Onate | 1,634.91 mi (2,631.13 km) |
| Gebze to Onda | 1,556.60 mi (2,505.11 km) |
| Gebze to Onteniente | 1,592.42 mi (2,562.75 km) |
| Gebze to Orihuela | 1,623.65 mi (2,613.01 km) |
| Gebze to Osuna | 1,858.02 mi (2,990.20 km) |
| Gebze to Ourense | 1,915.42 mi (3,082.57 km) |
| Gebze to Oviedo | 1,804.22 mi (2,903.62 km) |
| Gebze to Paiporta | 1,572.59 mi (2,530.84 km) |
| Gebze to Pajara | 2,591.60 mi (4,170.77 km) |
| Gebze to Palafolls | 1,382.17 mi (2,224.39 km) |
| Gebze to Palafrugell | 1,359.24 mi (2,187.49 km) |
| Gebze to Palamos | 1,361.48 mi (2,191.10 km) |
