| Hard to Frederick (Maryland) | 4,170.27 mi (6,711.39 km) |
| Hard to Fredericksburg (Texas) | 5,478.89 mi (8,817.41 km) |
| Hard to Fredericksburg (Virginia) | 4,222.98 mi (6,796.23 km) |
| Hard to Frederickson (Washington) | 5,292.40 mi (8,517.30 km) |
| Hard to Freeport (Illinois) | 4,524.22 mi (7,281.02 km) |
| Hard to Freeport (New York) | 3,958.97 mi (6,371.35 km) |
| Hard to Freeport (Texas) | 5,408.26 mi (8,703.76 km) |
| Hard to Fremont (California) | 5,850.89 mi (9,416.10 km) |
| Hard to Fremont (Nebraska) | 4,816.66 mi (7,751.66 km) |
| Hard to Fremont (Ohio) | 4,316.24 mi (6,946.32 km) |
| Hard to French Valley (California) | 5,937.85 mi (9,556.05 km) |
| Hard to Fresno (California) | 5,832.73 mi (9,386.86 km) |
| Hard to Fresno (Texas) | 5,382.26 mi (8,661.92 km) |
| Hard to Fridley (Minnesota) | 4,523.88 mi (7,280.48 km) |
| Hard to Friendly (Maryland) | 4,180.92 mi (6,728.54 km) |
