| Upminster to Argentona | 698.36 mi (1,123.91 km) |
| Upminster to Arico el Nuevo | 1,832.63 mi (2,949.34 km) |
| Upminster to Armilla | 1,013.14 mi (1,630.50 km) |
| Upminster to Arnedo | 654.65 mi (1,053.56 km) |
| Upminster to Arona | 1,842.87 mi (2,965.81 km) |
| Upminster to Arrecife | 1,715.67 mi (2,761.10 km) |
| Upminster to Arrigorriaga | 595.02 mi (957.59 km) |
| Upminster to Arroyomolinos | 804.78 mi (1,295.16 km) |
| Upminster to Arteijo | 700.91 mi (1,128.01 km) |
| Upminster to Arucas | 1,813.96 mi (2,919.28 km) |
| Upminster to Aspe | 914.07 mi (1,471.05 km) |
| Upminster to Astorga | 694.75 mi (1,118.10 km) |
| Upminster to Atarfe | 1,008.85 mi (1,623.59 km) |
| Upminster to Avila | 789.26 mi (1,270.19 km) |
| Upminster to Aviles | 622.36 mi (1,001.59 km) |
