| Ontario to Argentona | 5,976.01 mi (9,617.47 km) |
| Ontario to Arico el Nuevo | 5,727.39 mi (9,217.34 km) |
| Ontario to Armilla | 5,943.01 mi (9,564.36 km) |
| Ontario to Arnedo | 5,774.67 mi (9,293.43 km) |
| Ontario to Arona | 5,721.83 mi (9,208.40 km) |
| Ontario to Arrecife | 5,841.85 mi (9,401.55 km) |
| Ontario to Arrigorriaga | 5,699.67 mi (9,172.73 km) |
| Ontario to Arroyomolinos | 5,791.67 mi (9,320.80 km) |
| Ontario to Arteijo | 5,475.12 mi (8,811.35 km) |
| Ontario to Arucas | 5,778.78 mi (9,300.04 km) |
| Ontario to Aspe | 6,005.02 mi (9,664.15 km) |
| Ontario to Astorga | 5,608.78 mi (9,026.45 km) |
| Ontario to Atarfe | 5,936.68 mi (9,554.16 km) |
| Ontario to Avila | 5,743.11 mi (9,242.64 km) |
| Ontario to Aviles | 5,567.47 mi (8,959.97 km) |
