| Mersch to Olivenza | 1,002.83 mi (1,613.91 km) |
| Mersch to Olot | 550.72 mi (886.30 km) |
| Mersch to Onate | 615.73 mi (990.92 km) |
| Mersch to Onda | 743.96 mi (1,197.29 km) |
| Mersch to Onteniente | 823.89 mi (1,325.92 km) |
| Mersch to Orihuela | 877.98 mi (1,412.97 km) |
| Mersch to Osuna | 1,028.57 mi (1,655.33 km) |
| Mersch to Ourense | 840.85 mi (1,353.22 km) |
| Mersch to Oviedo | 717.61 mi (1,154.88 km) |
| Mersch to Paiporta | 781.26 mi (1,257.32 km) |
| Mersch to Pajara | 1,820.77 mi (2,930.25 km) |
| Mersch to Palafolls | 581.09 mi (935.17 km) |
| Mersch to Palafrugell | 559.23 mi (899.99 km) |
| Mersch to Palamos | 564.45 mi (908.39 km) |
| Mersch to Palencia | 738.25 mi (1,188.09 km) |
