| Houma to Olivares | 4,737.28 mi (7,623.91 km) |
| Houma to Olivenza | 4,657.47 mi (7,495.48 km) |
| Houma to Olot | 5,030.62 mi (8,096.00 km) |
| Houma to Onate | 4,778.12 mi (7,689.63 km) |
| Houma to Onda | 4,962.65 mi (7,986.61 km) |
| Houma to Onteniente | 4,977.71 mi (8,010.85 km) |
| Houma to Orihuela | 4,981.55 mi (8,017.04 km) |
| Houma to Osuna | 4,795.54 mi (7,717.68 km) |
| Houma to Ourense | 4,534.91 mi (7,298.24 km) |
| Houma to Oviedo | 4,608.46 mi (7,416.60 km) |
| Houma to Paiporta | 4,970.04 mi (7,998.51 km) |
| Houma to Pajara | 4,538.62 mi (7,304.20 km) |
| Houma to Palafolls | 5,057.69 mi (8,139.56 km) |
| Houma to Palafrugell | 5,069.69 mi (8,158.88 km) |
| Houma to Palamos | 5,070.20 mi (8,159.69 km) |
