| Gary to Robertsville (New Jersey) | 685.83 mi (1,103.73 km) |
| Gary to Robinson (Texas) | 884.91 mi (1,424.13 km) |
| Gary to Robstown (Texas) | 1,117.21 mi (1,797.98 km) |
| Gary to Rochester (Michigan) | 229.42 mi (369.22 km) |
| Gary to Rochester (Minnesota) | 309.29 mi (497.76 km) |
| Gary to Rochester (New Hampshire) | 841.48 mi (1,354.24 km) |
| Gary to Rochester (New York) | 508.17 mi (817.82 km) |
| Gary to Rochester Hills (Michigan) | 227.19 mi (365.63 km) |
| Gary to Rock Hill (South Carolina) | 572.97 mi (922.10 km) |
| Gary to Rock Island (Illinois) | 167.54 mi (269.64 km) |
| Gary to Rock Springs (Wyoming) | 1,127.24 mi (1,814.12 km) |
| Gary to Rockford (Illinois) | 99.62 mi (160.33 km) |
| Gary to Rockledge (Florida) | 989.57 mi (1,592.55 km) |
| Gary to Rocklin (California) | 1,787.86 mi (2,877.28 km) |
| Gary to Rockport (Texas) | 1,085.64 mi (1,747.17 km) |
