| Castel Gandolfo to Red Bank (New Jersey) | 4,309.94 mi (6,936.18 km) |
| Castel Gandolfo to Red Bank (Tennessee) | 5,018.09 mi (8,075.83 km) |
| Castel Gandolfo to Red Bluff (California) | 6,110.79 mi (9,834.37 km) |
| Castel Gandolfo to Red Hill (South Carolina) | 4,793.59 mi (7,714.54 km) |
| Castel Gandolfo to Red Oak (Texas) | 5,627.93 mi (9,057.28 km) |
| Castel Gandolfo to Red Wing (Minnesota) | 4,897.34 mi (7,881.51 km) |
| Castel Gandolfo to Redan (Georgia) | 5,028.03 mi (8,091.83 km) |
| Castel Gandolfo to Redding (California) | 6,090.98 mi (9,802.49 km) |
| Castel Gandolfo to Redland (Maryland) | 4,492.57 mi (7,230.10 km) |
| Castel Gandolfo to Redlands (California) | 6,309.69 mi (10,154.46 km) |
| Castel Gandolfo to Redmond (Oregon) | 5,843.10 mi (9,403.57 km) |
| Castel Gandolfo to Redmond (Washington) | 5,668.31 mi (9,122.27 km) |
| Castel Gandolfo to Redondo Beach (California) | 6,359.94 mi (10,235.34 km) |
| Castel Gandolfo to Redwood City (California) | 6,266.99 mi (10,085.74 km) |
| Castel Gandolfo to Reedley (California) | 6,236.56 mi (10,036.78 km) |
