| Longford to Frederick (Maryland) | 3,305.09 mi (5,319.03 km) |
| Longford to Fredericksburg (Texas) | 4,603.32 mi (7,408.34 km) |
| Longford to Fredericksburg (Virginia) | 3,360.42 mi (5,408.07 km) |
| Longford to Frederickson (Washington) | 4,489.07 mi (7,224.46 km) |
| Longford to Freeport (Illinois) | 3,647.95 mi (5,870.81 km) |
| Longford to Freeport (New York) | 3,096.82 mi (4,983.85 km) |
| Longford to Freeport (Texas) | 4,536.35 mi (7,300.56 km) |
| Longford to Fremont (California) | 5,016.92 mi (8,073.96 km) |
| Longford to Fremont (Nebraska) | 3,942.61 mi (6,345.01 km) |
| Longford to Fremont (Ohio) | 3,441.94 mi (5,539.26 km) |
| Longford to French Valley (California) | 5,081.65 mi (8,178.13 km) |
| Longford to Fresno (California) | 4,990.24 mi (8,031.02 km) |
| Longford to Fresno (Texas) | 4,509.64 mi (7,257.56 km) |
| Longford to Fridley (Minnesota) | 3,651.21 mi (5,876.05 km) |
| Longford to Friendly (Maryland) | 3,318.09 mi (5,339.95 km) |
