| Sintra to Fortuna Foothills (Arizona) | 5,549.18 mi (8,930.55 km) |
| Sintra to Foster City (California) | 5,655.42 mi (9,101.52 km) |
| Sintra to Fostoria (Ohio) | 3,798.58 mi (6,113.23 km) |
| Sintra to Fountain (Colorado) | 4,863.79 mi (7,827.52 km) |
| Sintra to Fountain Hills (Arizona) | 5,389.03 mi (8,672.80 km) |
| Sintra to Fountain Inn (South Carolina) | 3,931.70 mi (6,327.47 km) |
| Sintra to Fountain Valley (California) | 5,656.86 mi (9,103.84 km) |
| Sintra to Fountainebleau (Florida) | 4,139.10 mi (6,661.23 km) |
| Sintra to Four Corners (Oregon) | 5,333.17 mi (8,582.91 km) |
| Sintra to Four Corners (Texas) | 4,785.06 mi (7,700.81 km) |
| Sintra to Four Square Mile (Colorado) | 4,834.08 mi (7,779.71 km) |
| Sintra to Fox Crossing (Wisconsin) | 3,947.26 mi (6,352.50 km) |
| Sintra to Fox Lake (Illinois) | 3,986.06 mi (6,414.94 km) |
| Sintra to Framingham (Massachusetts) | 3,193.32 mi (5,139.15 km) |
| Sintra to Franconia (Virginia) | 3,559.70 mi (5,728.79 km) |
