| Ontario to Greenwood (South Carolina) | 2,017.53 mi (3,246.90 km) |
| Ontario to Greenwood Village (Colorado) | 799.67 mi (1,286.95 km) |
| Ontario to Greer (South Carolina) | 2,005.04 mi (3,226.80 km) |
| Ontario to Grenada (Mississippi) | 1,588.87 mi (2,557.03 km) |
| Ontario to Gresham (Oregon) | 832.17 mi (1,339.24 km) |
| Ontario to Gretna (Louisiana) | 1,634.90 mi (2,631.11 km) |
| Ontario to Griffin (Georgia) | 1,909.58 mi (3,073.17 km) |
| Ontario to Griffith (Indiana) | 1,717.37 mi (2,763.85 km) |
| Ontario to Grimes (Iowa) | 1,396.27 mi (2,247.07 km) |
| Ontario to Grosse Pointe Park (Michigan) | 1,953.56 mi (3,143.96 km) |
| Ontario to Grosse Pointe Woods (Michigan) | 1,955.47 mi (3,147.03 km) |
| Ontario to Grove City (Ohio) | 1,936.38 mi (3,116.31 km) |
| Ontario to Groveland (Florida) | 2,133.93 mi (3,434.22 km) |
| Ontario to Grover Beach (California) | 186.97 mi (300.91 km) |
| Ontario to Groves (Texas) | 1,413.35 mi (2,274.57 km) |
