| Santarem to Oakley (California) | 5,619.40 mi (9,043.54 km) |
| Santarem to Oakton (Virginia) | 3,586.55 mi (5,772.00 km) |
| Santarem to Oakville (Missouri) | 4,229.45 mi (6,806.64 km) |
| Santarem to Oatfield (Oregon) | 5,299.33 mi (8,528.44 km) |
| Santarem to Ocala (Florida) | 4,141.83 mi (6,665.63 km) |
| Santarem to Ocean Acres (New Jersey) | 3,414.80 mi (5,495.59 km) |
| Santarem to Ocean City (New Jersey) | 3,442.99 mi (5,540.96 km) |
| Santarem to Ocean Pines (Maryland) | 3,493.70 mi (5,622.56 km) |
| Santarem to Ocean Pointe (Hawaii) | 7,807.99 mi (12,565.74 km) |
| Santarem to Ocean Springs (Mississippi) | 4,436.85 mi (7,140.42 km) |
| Santarem to Oceanside (California) | 5,663.75 mi (9,114.93 km) |
| Santarem to Oceanside (New York) | 3,360.81 mi (5,408.70 km) |
| Santarem to Ocoee (Florida) | 4,131.08 mi (6,648.33 km) |
| Santarem to Oconomowoc (Wisconsin) | 3,996.63 mi (6,431.95 km) |
| Santarem to Odenton (Maryland) | 3,551.73 mi (5,715.95 km) |
