| Darby to Frederick (Maryland) | 119.34 mi (192.06 km) |
| Darby to Fredericksburg (Texas) | 1,486.03 mi (2,391.53 km) |
| Darby to Fredericksburg (Virginia) | 163.70 mi (263.45 km) |
| Darby to Frederickson (Washington) | 2,374.29 mi (3,821.05 km) |
| Darby to Freeport (Illinois) | 765.00 mi (1,231.14 km) |
| Darby to Freeport (New York) | 101.74 mi (163.73 km) |
| Darby to Freeport (Texas) | 1,368.57 mi (2,202.50 km) |
| Darby to Fremont (California) | 2,495.19 mi (4,015.63 km) |
| Darby to Fremont (Nebraska) | 1,114.33 mi (1,793.34 km) |
| Darby to Fremont (Ohio) | 423.34 mi (681.30 km) |
| Darby to French Valley (California) | 2,335.31 mi (3,758.31 km) |
| Darby to Fresno (California) | 2,397.71 mi (3,858.73 km) |
| Darby to Fresno (Texas) | 1,348.50 mi (2,170.21 km) |
| Darby to Fridley (Minnesota) | 981.15 mi (1,579.01 km) |
| Darby to Friendly (Maryland) | 121.31 mi (195.23 km) |
