| Sintra to Wichita (Kansas) | 4,567.32 mi (7,350.38 km) |
| Sintra to Wichita Falls (Texas) | 4,763.72 mi (7,666.47 km) |
| Sintra to Wickliffe (Ohio) | 3,693.83 mi (5,944.65 km) |
| Sintra to Wildomar (California) | 5,631.31 mi (9,062.72 km) |
| Sintra to Wildwood (Florida) | 4,119.56 mi (6,629.79 km) |
| Sintra to Wildwood (Missouri) | 4,222.44 mi (6,795.36 km) |
| Sintra to Wilkes-Barre (Pennsylvania) | 3,433.43 mi (5,525.58 km) |
| Sintra to Wilkinsburg (Pennsylvania) | 3,648.09 mi (5,871.03 km) |
| Sintra to Williamsburg (Virginia) | 3,578.13 mi (5,758.44 km) |
| Sintra to Williamsport (Pennsylvania) | 3,490.03 mi (5,616.67 km) |
| Sintra to Williamstown (New Jersey) | 3,427.71 mi (5,516.37 km) |
| Sintra to Willimantic (Connecticut) | 3,243.75 mi (5,220.31 km) |
| Sintra to Williston (North Dakota) | 4,465.42 mi (7,186.39 km) |
| Sintra to Willmar (Minnesota) | 4,211.39 mi (6,777.57 km) |
| Sintra to Willoughby (Ohio) | 3,689.91 mi (5,938.34 km) |
