| Mack to University Place (Washington) | 1,966.03 mi (3,164.03 km) |
| Mack to Upland (California) | 1,850.83 mi (2,978.63 km) |
| Mack to Upper Arlington (Ohio) | 104.97 mi (168.94 km) |
| Mack to Upper Grand Lagoon (Florida) | 623.38 mi (1,003.24 km) |
| Mack to Upper Montclair (New Jersey) | 566.50 mi (911.69 km) |
| Mack to Urbana (Illinois) | 198.62 mi (319.65 km) |
| Mack to Urbana (Maryland) | 392.72 mi (632.03 km) |
| Mack to Urbana (Ohio) | 82.57 mi (132.88 km) |
| Mack to Urbandale (Iowa) | 508.60 mi (818.51 km) |
| Mack to Utica (New York) | 562.06 mi (904.55 km) |
| Mack to Uvalde (Texas) | 1,100.03 mi (1,770.33 km) |
| Mack to Vacaville (California) | 1,995.61 mi (3,211.63 km) |
| Mack to Vadnais Heights (Minnesota) | 592.56 mi (953.63 km) |
| Mack to Vail (Arizona) | 1,536.11 mi (2,472.13 km) |
| Mack to Valdosta (Georgia) | 578.84 mi (931.55 km) |
