| Santarem to Orangevale (California) | 5,567.63 mi (8,960.24 km) |
| Santarem to Orchards (Washington) | 5,284.00 mi (8,503.77 km) |
| Santarem to Orcutt (California) | 5,717.28 mi (9,201.07 km) |
| Santarem to Oregon (Ohio) | 3,804.72 mi (6,123.11 km) |
| Santarem to Oregon (Wisconsin) | 4,042.51 mi (6,505.80 km) |
| Santarem to Oregon City (Oregon) | 5,302.62 mi (8,533.74 km) |
| Santarem to Orem (Utah) | 5,111.22 mi (8,225.72 km) |
| Santarem to Orinda (California) | 5,643.75 mi (9,082.73 km) |
| Santarem to Orland Park (Illinois) | 4,012.87 mi (6,458.08 km) |
| Santarem to Orlando (Florida) | 4,124.53 mi (6,637.79 km) |
| Santarem to Ormond Beach (Florida) | 4,083.19 mi (6,571.26 km) |
| Santarem to Oro Valley (Arizona) | 5,421.62 mi (8,725.25 km) |
| Santarem to Oroville (California) | 5,542.29 mi (8,919.46 km) |
| Santarem to Oshkosh (Wisconsin) | 3,972.17 mi (6,392.59 km) |
| Santarem to Oskaloosa (Iowa) | 4,242.41 mi (6,827.51 km) |
