| Gary to Romeoville (Illinois) | 38.97 mi (62.72 km) |
| Gary to Romulus (Michigan) | 209.32 mi (336.88 km) |
| Gary to Ronkonkoma (New York) | 740.58 mi (1,191.85 km) |
| Gary to Roosevelt (New York) | 718.22 mi (1,155.87 km) |
| Gary to Rosamond (California) | 1,728.38 mi (2,781.56 km) |
| Gary to Rosaryville (Maryland) | 588.17 mi (946.57 km) |
| Gary to Roscoe (Illinois) | 102.96 mi (165.70 km) |
| Gary to Rose Hill (Virginia) | 573.64 mi (923.19 km) |
| Gary to Roseburg (Oregon) | 1,826.10 mi (2,938.82 km) |
| Gary to Rosedale (California) | 1,764.55 mi (2,839.77 km) |
| Gary to Rosedale (Maryland) | 590.44 mi (950.22 km) |
| Gary to Roselle (Illinois) | 46.65 mi (75.08 km) |
| Gary to Roselle (New Jersey) | 683.60 mi (1,100.14 km) |
| Gary to Roselle Park (New Jersey) | 683.10 mi (1,099.35 km) |
| Gary to Rosemead (California) | 1,745.35 mi (2,808.87 km) |
