| Sintra to Kinston (North Carolina) | 3,680.42 mi (5,923.06 km) |
| Sintra to Kirkland (Washington) | 5,177.11 mi (8,331.76 km) |
| Sintra to Kirksville (Missouri) | 4,258.75 mi (6,853.80 km) |
| Sintra to Kirkwood (Missouri) | 4,210.62 mi (6,776.33 km) |
| Sintra to Kiryas Joel (New York) | 3,347.83 mi (5,387.81 km) |
| Sintra to Kissimmee (Florida) | 4,105.20 mi (6,606.67 km) |
| Sintra to Klamath Falls (Oregon) | 5,416.29 mi (8,716.67 km) |
| Sintra to Knightdale (North Carolina) | 3,710.94 mi (5,972.18 km) |
| Sintra to Knik-Fairview (Alaska) | 5,156.96 mi (8,299.33 km) |
| Sintra to Knoxville (Tennessee) | 3,979.24 mi (6,403.97 km) |
| Sintra to Kokomo (Indiana) | 3,947.71 mi (6,353.22 km) |
| Sintra to Kuna (Idaho) | 5,153.11 mi (8,293.13 km) |
| Sintra to Kyle (Texas) | 4,883.12 mi (7,858.63 km) |
| Sintra to La Cañada Flintridge (California) | 5,644.53 mi (9,083.99 km) |
| Sintra to La Crescenta-Montrose (California) | 5,644.98 mi (9,084.72 km) |
