| Luton to Olivares | 1,037.39 mi (1,669.52 km) |
| Luton to Olivenza | 966.72 mi (1,555.79 km) |
| Luton to Olot | 683.60 mi (1,100.15 km) |
| Luton to Onate | 618.18 mi (994.87 km) |
| Luton to Onda | 823.33 mi (1,325.03 km) |
| Luton to Onteniente | 902.14 mi (1,451.85 km) |
| Luton to Orihuela | 953.33 mi (1,534.24 km) |
| Luton to Osuna | 1,037.28 mi (1,669.34 km) |
| Luton to Ourense | 745.64 mi (1,200.00 km) |
| Luton to Oviedo | 640.15 mi (1,030.22 km) |
| Luton to Paiporta | 860.25 mi (1,384.43 km) |
| Luton to Pajara | 1,772.39 mi (2,852.39 km) |
| Luton to Palafolls | 720.92 mi (1,160.22 km) |
| Luton to Palafrugell | 708.43 mi (1,140.11 km) |
| Luton to Palamos | 712.88 mi (1,147.27 km) |
