| Fort Collins to Aberaman | 4,523.36 mi (7,279.64 km) |
| Fort Collins to Aberbargoed | 4,530.81 mi (7,291.64 km) |
| Fort Collins to Aberdare | 4,522.43 mi (7,278.15 km) |
| Fort Collins to Aberdeen | 4,354.08 mi (7,007.22 km) |
| Fort Collins to Abergavenny | 4,532.98 mi (7,295.12 km) |
| Fort Collins to Abergele | 4,456.05 mi (7,171.33 km) |
| Fort Collins to Abertawe | 4,508.51 mi (7,255.74 km) |
| Fort Collins to Abertillery | 4,532.78 mi (7,294.80 km) |
| Fort Collins to Aberystwyth | 4,472.62 mi (7,197.99 km) |
| Fort Collins to Abingdon | 4,599.42 mi (7,402.05 km) |
| Fort Collins to Abram | 4,480.70 mi (7,210.99 km) |
| Fort Collins to Accrington | 4,478.51 mi (7,207.46 km) |
| Fort Collins to Acomb | 4,511.58 mi (7,260.69 km) |
| Fort Collins to Acton | 4,640.57 mi (7,468.28 km) |
| Fort Collins to Addlestone | 4,639.03 mi (7,465.80 km) |
