| Duncan to Fenton | 4,576.25 mi (7,364.76 km) |
| Duncan to Fern Down | 4,654.52 mi (7,490.72 km) |
| Duncan to Ferryhill | 4,546.65 mi (7,317.13 km) |
| Duncan to Finchley | 4,694.61 mi (7,555.24 km) |
| Duncan to Fleet | 4,679.87 mi (7,531.52 km) |
| Duncan to Fleetwood | 4,516.71 mi (7,268.94 km) |
| Duncan to Flint | 4,532.22 mi (7,293.90 km) |
| Duncan to Flitwick | 4,669.77 mi (7,515.26 km) |
| Duncan to Flixton | 4,553.86 mi (7,328.73 km) |
| Duncan to Folkestone | 4,763.03 mi (7,665.35 km) |
| Duncan to Forfar | 4,441.82 mi (7,148.42 km) |
| Duncan to Formby | 4,525.51 mi (7,283.11 km) |
| Duncan to Forres | 4,389.75 mi (7,064.62 km) |
| Duncan to Fort William | 4,359.95 mi (7,016.67 km) |
| Duncan to Fraserburgh | 4,441.90 mi (7,148.55 km) |
