| Houghton le Spring to Olivares | 1,223.92 mi (1,969.71 km) |
| Houghton le Spring to Olivenza | 1,146.69 mi (1,845.42 km) |
| Houghton le Spring to Olot | 892.83 mi (1,436.87 km) |
| Houghton le Spring to Onate | 816.95 mi (1,314.75 km) |
| Houghton le Spring to Onda | 1,029.51 mi (1,656.83 km) |
| Houghton le Spring to Onteniente | 1,107.52 mi (1,782.38 km) |
| Houghton le Spring to Orihuela | 1,157.94 mi (1,863.53 km) |
| Houghton le Spring to Osuna | 1,228.57 mi (1,977.19 km) |
| Houghton le Spring to Ourense | 911.15 mi (1,466.35 km) |
| Houghton le Spring to Oviedo | 817.19 mi (1,315.14 km) |
| Houghton le Spring to Paiporta | 1,066.06 mi (1,715.66 km) |
| Houghton le Spring to Pajara | 1,936.38 mi (3,116.31 km) |
| Houghton le Spring to Palafolls | 930.11 mi (1,496.87 km) |
| Houghton le Spring to Palafrugell | 917.37 mi (1,476.36 km) |
| Houghton le Spring to Palamos | 921.86 mi (1,483.59 km) |
