| Olbia to Arico el Nuevo | 1,711.04 mi (2,753.66 km) |
| Olbia to Armilla | 749.62 mi (1,206.39 km) |
| Olbia to Arnedo | 605.86 mi (975.03 km) |
| Olbia to Arona | 1,723.71 mi (2,774.04 km) |
| Olbia to Arrecife | 1,537.47 mi (2,474.33 km) |
| Olbia to Arrigorriaga | 654.10 mi (1,052.67 km) |
| Olbia to Arroyomolinos | 703.80 mi (1,132.66 km) |
| Olbia to Arteijo | 935.92 mi (1,506.21 km) |
| Olbia to Arucas | 1,667.43 mi (2,683.48 km) |
| Olbia to Aspe | 574.18 mi (924.05 km) |
| Olbia to Astorga | 808.90 mi (1,301.80 km) |
| Olbia to Atarfe | 751.23 mi (1,208.99 km) |
| Olbia to Avila | 741.44 mi (1,193.22 km) |
| Olbia to Aviles | 807.75 mi (1,299.95 km) |
| Olbia to Ayamonte | 940.65 mi (1,513.83 km) |
