| Rockville to Waimea (Hawaii) | 4,754.66 mi (7,651.88 km) |
| Rockville to Waipahu (Hawaii) | 4,824.94 mi (7,765.00 km) |
| Rockville to Waipio (Hawaii) | 4,823.10 mi (7,762.03 km) |
| Rockville to Wake Forest (North Carolina) | 228.07 mi (367.04 km) |
| Rockville to Wakefield (Virginia) | 18.57 mi (29.88 km) |
| Rockville to Waldorf (Maryland) | 35.18 mi (56.62 km) |
| Rockville to Walker (Michigan) | 522.17 mi (840.36 km) |
| Rockville to Walker Mill (Maryland) | 20.39 mi (32.82 km) |
| Rockville to Walla Walla (Washington) | 2,125.01 mi (3,419.87 km) |
| Rockville to Wallingford Center (Connecticut) | 281.01 mi (452.25 km) |
| Rockville to Wallington (New Jersey) | 202.50 mi (325.90 km) |
| Rockville to Walnut (California) | 2,266.72 mi (3,647.93 km) |
| Rockville to Walnut Creek (California) | 2,403.64 mi (3,868.29 km) |
| Rockville to Walnut Park (California) | 2,287.73 mi (3,681.75 km) |
| Rockville to Waltham (Massachusetts) | 384.54 mi (618.86 km) |
