| Mainz to Olivenza | 1,084.98 mi (1,746.10 km) |
| Mainz to Olot | 605.52 mi (974.50 km) |
| Mainz to Onate | 697.80 mi (1,123.00 km) |
| Mainz to Onda | 807.04 mi (1,298.80 km) |
| Mainz to Onteniente | 885.45 mi (1,424.99 km) |
| Mainz to Orihuela | 939.22 mi (1,511.53 km) |
| Mainz to Osuna | 1,102.44 mi (1,774.21 km) |
| Mainz to Ourense | 932.32 mi (1,500.43 km) |
| Mainz to Oviedo | 808.49 mi (1,301.14 km) |
| Mainz to Paiporta | 843.56 mi (1,357.58 km) |
| Mainz to Pajara | 1,900.25 mi (3,058.16 km) |
| Mainz to Palafolls | 632.44 mi (1,017.81 km) |
| Mainz to Palafrugell | 608.49 mi (979.26 km) |
| Mainz to Palamos | 613.73 mi (987.71 km) |
| Mainz to Palencia | 822.82 mi (1,324.20 km) |
