| San Juan to Olympia (Washington) | 3,745.96 mi (6,028.54 km) |
| San Juan to Olympia Heights (Florida) | 1,043.91 mi (1,680.02 km) |
| San Juan to Omaha (Nebraska) | 2,371.16 mi (3,816.02 km) |
| San Juan to On Top of the World Designated Place (Florida) | 1,262.63 mi (2,032.00 km) |
| San Juan to Onalaska (Wisconsin) | 2,286.04 mi (3,679.03 km) |
| San Juan to Oneida (New York) | 1,794.95 mi (2,888.70 km) |
| San Juan to Oneonta (New York) | 1,744.07 mi (2,806.80 km) |
| San Juan to Ontario (California) | 3,334.89 mi (5,366.98 km) |
| San Juan to Ontario (Oregon) | 3,419.81 mi (5,503.65 km) |
| San Juan to Opa-locka (Florida) | 1,044.67 mi (1,681.24 km) |
| San Juan to Opelika (Alabama) | 1,551.19 mi (2,496.40 km) |
| San Juan to Opelousas (Louisiana) | 1,831.87 mi (2,948.11 km) |
| San Juan to Orange (California) | 3,345.74 mi (5,384.44 km) |
| San Juan to Orange (Texas) | 1,916.58 mi (3,084.43 km) |
| San Juan to Orange City (Florida) | 1,205.60 mi (1,940.23 km) |
