| Sun Prairie to Reading (Pennsylvania) | 712.62 mi (1,146.86 km) |
| Sun Prairie to Red Bank (New Jersey) | 804.65 mi (1,294.96 km) |
| Sun Prairie to Red Bank (Tennessee) | 596.07 mi (959.29 km) |
| Sun Prairie to Red Bluff (California) | 1,704.71 mi (2,743.47 km) |
| Sun Prairie to Red Hill (South Carolina) | 851.95 mi (1,371.08 km) |
| Sun Prairie to Red Oak (Texas) | 843.10 mi (1,356.84 km) |
| Sun Prairie to Red Wing (Minnesota) | 193.54 mi (311.48 km) |
| Sun Prairie to Redan (Georgia) | 707.44 mi (1,138.52 km) |
| Sun Prairie to Redding (California) | 1,702.68 mi (2,740.20 km) |
| Sun Prairie to Redland (Maryland) | 687.46 mi (1,106.36 km) |
| Sun Prairie to Redlands (California) | 1,624.97 mi (2,615.14 km) |
| Sun Prairie to Redmond (Oregon) | 1,586.78 mi (2,553.68 km) |
| Sun Prairie to Redmond (Washington) | 1,611.60 mi (2,593.62 km) |
| Sun Prairie to Redondo Beach (California) | 1,691.04 mi (2,721.46 km) |
| Sun Prairie to Redwood City (California) | 1,768.86 mi (2,846.70 km) |
