| Langenfeld to Fortuna Foothills (Arizona) | 5,641.66 mi (9,079.37 km) |
| Langenfeld to Foster City (California) | 5,582.92 mi (8,984.84 km) |
| Langenfeld to Fostoria (Ohio) | 4,102.74 mi (6,602.73 km) |
| Langenfeld to Fountain (Colorado) | 4,987.48 mi (8,026.58 km) |
| Langenfeld to Fountain Hills (Arizona) | 5,502.43 mi (8,855.30 km) |
| Langenfeld to Fountain Inn (South Carolina) | 4,367.12 mi (7,028.21 km) |
| Langenfeld to Fountain Valley (California) | 5,689.33 mi (9,156.09 km) |
| Langenfeld to Fountainebleau (Florida) | 4,738.75 mi (7,626.27 km) |
| Langenfeld to Four Corners (Oregon) | 5,158.56 mi (8,301.90 km) |
| Langenfeld to Four Corners (Texas) | 5,151.48 mi (8,290.50 km) |
| Langenfeld to Four Square Mile (Colorado) | 4,940.10 mi (7,950.32 km) |
| Langenfeld to Fox Crossing (Wisconsin) | 4,143.89 mi (6,668.95 km) |
| Langenfeld to Fox Lake (Illinois) | 4,219.87 mi (6,791.22 km) |
| Langenfeld to Framingham (Massachusetts) | 3,583.97 mi (5,767.85 km) |
| Langenfeld to Franconia (Virginia) | 3,971.15 mi (6,390.95 km) |
