| Groningen to Olivenza | 1,195.10 mi (1,923.32 km) |
| Groningen to Olot | 785.30 mi (1,263.82 km) |
| Groningen to Onate | 815.10 mi (1,311.77 km) |
| Groningen to Onda | 970.42 mi (1,561.75 km) |
| Groningen to Onteniente | 1,051.15 mi (1,691.66 km) |
| Groningen to Orihuela | 1,105.17 mi (1,778.59 km) |
| Groningen to Osuna | 1,238.09 mi (1,992.51 km) |
| Groningen to Ourense | 1,003.24 mi (1,614.55 km) |
| Groningen to Oviedo | 885.92 mi (1,425.75 km) |
| Groningen to Paiporta | 1,008.16 mi (1,622.47 km) |
| Groningen to Pajara | 2,013.83 mi (3,240.94 km) |
| Groningen to Palafolls | 817.24 mi (1,315.21 km) |
| Groningen to Palafrugell | 796.43 mi (1,281.73 km) |
| Groningen to Palamos | 801.61 mi (1,290.07 km) |
| Groningen to Palencia | 928.29 mi (1,493.94 km) |
