| Antrim to Olivares | 1,195.36 mi (1,923.74 km) |
| Antrim to Olivenza | 1,108.46 mi (1,783.89 km) |
| Antrim to Olot | 951.65 mi (1,531.54 km) |
| Antrim to Onate | 825.13 mi (1,327.92 km) |
| Antrim to Onda | 1,055.79 mi (1,699.14 km) |
| Antrim to Onteniente | 1,128.86 mi (1,816.72 km) |
| Antrim to Orihuela | 1,175.32 mi (1,891.49 km) |
| Antrim to Osuna | 1,209.15 mi (1,945.95 km) |
| Antrim to Ourense | 858.73 mi (1,381.99 km) |
| Antrim to Oviedo | 784.88 mi (1,263.14 km) |
| Antrim to Paiporta | 1,090.02 mi (1,754.22 km) |
| Antrim to Pajara | 1,864.29 mi (3,000.28 km) |
| Antrim to Palafolls | 989.56 mi (1,592.55 km) |
| Antrim to Palafrugell | 981.59 mi (1,579.71 km) |
| Antrim to Palamos | 985.49 mi (1,585.99 km) |
