| Troy to Reading (Pennsylvania) | 404.44 mi (650.88 km) |
| Troy to Red Bank (New Jersey) | 494.44 mi (795.72 km) |
| Troy to Red Bank (Tennessee) | 528.89 mi (851.16 km) |
| Troy to Red Bluff (California) | 2,015.72 mi (3,243.98 km) |
| Troy to Red Hill (South Carolina) | 648.20 mi (1,043.17 km) |
| Troy to Red Oak (Texas) | 1,018.11 mi (1,638.49 km) |
| Troy to Red Wing (Minnesota) | 492.80 mi (793.08 km) |
| Troy to Redan (Georgia) | 613.43 mi (987.22 km) |
| Troy to Redding (California) | 2,013.74 mi (3,240.81 km) |
| Troy to Redland (Maryland) | 393.58 mi (633.40 km) |
| Troy to Redlands (California) | 1,921.59 mi (3,092.50 km) |
| Troy to Redmond (Oregon) | 1,895.15 mi (3,049.95 km) |
| Troy to Redmond (Washington) | 1,911.09 mi (3,075.61 km) |
| Troy to Redondo Beach (California) | 1,988.84 mi (3,200.73 km) |
| Troy to Redwood City (California) | 2,077.87 mi (3,344.00 km) |
