| Duncan to Exeter (California) | 1,198.80 mi (1,929.28 km) |
| Duncan to Fair Lawn (New Jersey) | 1,368.50 mi (2,202.38 km) |
| Duncan to Fair Oaks (California) | 1,321.00 mi (2,125.94 km) |
| Duncan to Fair Oaks (Virginia) | 1,174.79 mi (1,890.65 km) |
| Duncan to Fairbanks (Alaska) | 2,922.96 mi (4,704.04 km) |
| Duncan to Fairborn (Ohio) | 846.51 mi (1,362.33 km) |
| Duncan to Fairburn (Georgia) | 765.66 mi (1,232.21 km) |
| Duncan to Fairfax (Virginia) | 1,177.81 mi (1,895.50 km) |
| Duncan to Fairfax Station (Virginia) | 1,175.30 mi (1,891.47 km) |
| Duncan to Fairfield (California) | 1,361.25 mi (2,190.72 km) |
| Duncan to Fairfield (Ohio) | 808.59 mi (1,301.31 km) |
| Duncan to Fairhope (Alabama) | 647.03 mi (1,041.30 km) |
| Duncan to Fairland (Maryland) | 1,198.55 mi (1,928.88 km) |
| Duncan to Fairmont (Minnesota) | 655.60 mi (1,055.08 km) |
| Duncan to Fairmont (West Virginia) | 1,036.06 mi (1,667.38 km) |
