| Detroit to Grottaferrata | 4,616.08 mi (7,428.87 km) |
| Detroit to Grottaglie | 4,864.25 mi (7,828.25 km) |
| Detroit to Grottammare | 4,614.80 mi (7,426.80 km) |
| Detroit to Grugliasco | 4,276.81 mi (6,882.86 km) |
| Detroit to Grumo Appula | 4,813.40 mi (7,746.42 km) |
| Detroit to Grumo Nevano | 4,717.67 mi (7,592.36 km) |
| Detroit to Gualdo Tadino | 4,560.99 mi (7,340.20 km) |
| Detroit to Guardiagrele | 4,662.06 mi (7,502.86 km) |
| Detroit to Guastalla | 4,407.85 mi (7,093.75 km) |
| Detroit to Gubbio | 4,547.43 mi (7,318.39 km) |
| Detroit to Guspini | 4,538.10 mi (7,303.37 km) |
| Detroit to Gussago | 4,360.40 mi (7,017.38 km) |
| Detroit to Iesi | 4,567.45 mi (7,350.59 km) |
| Detroit to Iesolo | 4,462.04 mi (7,180.96 km) |
| Detroit to Iglesias | 4,542.56 mi (7,310.54 km) |
