| Tomball to Olivares | 4,966.29 mi (7,992.48 km) |
| Tomball to Olivenza | 4,883.35 mi (7,859.00 km) |
| Tomball to Olot | 5,233.29 mi (8,422.17 km) |
| Tomball to Onate | 4,983.69 mi (8,020.48 km) |
| Tomball to Onda | 5,176.45 mi (8,330.70 km) |
| Tomball to Onteniente | 5,195.75 mi (8,361.75 km) |
| Tomball to Orihuela | 5,202.42 mi (8,372.49 km) |
| Tomball to Osuna | 5,023.99 mi (8,085.33 km) |
| Tomball to Ourense | 4,748.84 mi (7,642.52 km) |
| Tomball to Oviedo | 4,816.57 mi (7,751.52 km) |
| Tomball to Paiporta | 5,185.83 mi (8,345.79 km) |
| Tomball to Pajara | 4,801.16 mi (7,726.73 km) |
| Tomball to Palafolls | 5,261.82 mi (8,468.08 km) |
| Tomball to Palafrugell | 5,272.42 mi (8,485.14 km) |
| Tomball to Palamos | 5,273.22 mi (8,486.42 km) |
