| Willoughby to Robbinsdale (Minnesota) | 642.40 mi (1,033.85 km) |
| Willoughby to Robertsville (New Jersey) | 381.73 mi (614.33 km) |
| Willoughby to Robinson (Texas) | 1,117.95 mi (1,799.16 km) |
| Willoughby to Robstown (Texas) | 1,325.42 mi (2,133.06 km) |
| Willoughby to Rochester (Michigan) | 113.36 mi (182.44 km) |
| Willoughby to Rochester (Minnesota) | 583.78 mi (939.51 km) |
| Willoughby to Rochester (New Hampshire) | 543.27 mi (874.32 km) |
| Willoughby to Rochester (New York) | 220.17 mi (354.33 km) |
| Willoughby to Rochester Hills (Michigan) | 113.88 mi (183.26 km) |
| Willoughby to Rock Hill (South Carolina) | 463.70 mi (746.25 km) |
| Willoughby to Rock Island (Illinois) | 474.26 mi (763.24 km) |
| Willoughby to Rock Springs (Wyoming) | 1,430.27 mi (2,301.79 km) |
| Willoughby to Rockford (Illinois) | 395.52 mi (636.53 km) |
| Willoughby to Rockledge (Florida) | 921.49 mi (1,482.99 km) |
| Willoughby to Rocklin (California) | 2,092.09 mi (3,366.90 km) |
