| Boulder to Florence (South Carolina) | 1,454.47 mi (2,340.75 km) |
| Boulder to Florence-Graham (California) | 828.88 mi (1,333.96 km) |
| Boulder to Florham Park (New Jersey) | 1,616.02 mi (2,600.73 km) |
| Boulder to Florida (Puerto Rico) | 2,740.02 mi (4,409.64 km) |
| Boulder to Florida City (Florida) | 1,747.96 mi (2,813.07 km) |
| Boulder to Florida Ridge (Florida) | 1,657.96 mi (2,668.23 km) |
| Boulder to Florin (California) | 869.48 mi (1,399.30 km) |
| Boulder to Florissant (Missouri) | 800.28 mi (1,287.92 km) |
| Boulder to Flower Hill (Maryland) | 1,489.44 mi (2,397.02 km) |
| Boulder to Flower Mound (Texas) | 660.78 mi (1,063.42 km) |
| Boulder to Flowing Wells (Arizona) | 622.97 mi (1,002.57 km) |
| Boulder to Foley (Alabama) | 1,191.52 mi (1,917.57 km) |
| Boulder to Folsom (California) | 853.04 mi (1,372.84 km) |
| Boulder to Fond du Lac (Wisconsin) | 900.74 mi (1,449.60 km) |
| Boulder to Fontana (California) | 786.81 mi (1,266.25 km) |
