| Monroe to Romeoville (Illinois) | 666.54 mi (1,072.70 km) |
| Monroe to Romulus (Michigan) | 822.68 mi (1,323.97 km) |
| Monroe to Ronkonkoma (New York) | 1,192.66 mi (1,919.40 km) |
| Monroe to Roosevelt (New York) | 1,167.19 mi (1,878.41 km) |
| Monroe to Rosamond (California) | 1,507.06 mi (2,425.38 km) |
| Monroe to Rosaryville (Maryland) | 957.27 mi (1,540.58 km) |
| Monroe to Roscoe (Illinois) | 704.76 mi (1,134.20 km) |
| Monroe to Rose Hill (Virginia) | 943.77 mi (1,518.85 km) |
| Monroe to Roseburg (Oregon) | 1,845.31 mi (2,969.75 km) |
| Monroe to Rosedale (California) | 1,562.44 mi (2,514.51 km) |
| Monroe to Rosedale (Maryland) | 988.03 mi (1,590.09 km) |
| Monroe to Roselle (Illinois) | 689.43 mi (1,109.54 km) |
| Monroe to Roselle (New Jersey) | 1,133.95 mi (1,824.91 km) |
| Monroe to Roselle Park (New Jersey) | 1,133.98 mi (1,824.97 km) |
| Monroe to Rosemead (California) | 1,501.64 mi (2,416.66 km) |
