| Waltham to Reading (Pennsylvania) | 281.09 mi (452.37 km) |
| Waltham to Red Bank (New Jersey) | 203.30 mi (327.18 km) |
| Waltham to Red Bank (Tennessee) | 907.14 mi (1,459.90 km) |
| Waltham to Red Bluff (California) | 2,612.29 mi (4,204.08 km) |
| Waltham to Red Hill (South Carolina) | 729.00 mi (1,173.21 km) |
| Waltham to Red Oak (Texas) | 1,549.92 mi (2,494.35 km) |
| Waltham to Red Wing (Minnesota) | 1,078.36 mi (1,735.44 km) |
| Waltham to Redan (Georgia) | 920.77 mi (1,481.83 km) |
| Waltham to Redding (California) | 2,608.88 mi (4,198.59 km) |
| Waltham to Redland (Maryland) | 382.01 mi (614.78 km) |
| Waltham to Redlands (California) | 2,526.78 mi (4,066.46 km) |
| Waltham to Redmond (Oregon) | 2,474.30 mi (3,982.00 km) |
| Waltham to Redmond (Washington) | 2,465.50 mi (3,967.84 km) |
| Waltham to Redondo Beach (California) | 2,594.33 mi (4,175.17 km) |
| Waltham to Redwood City (California) | 2,681.03 mi (4,314.70 km) |
