| Santarem to Odessa (Texas) | 5,045.05 mi (8,119.22 km) |
| Santarem to Ogden (Utah) | 5,082.52 mi (8,179.53 km) |
| Santarem to Oildale (California) | 5,633.44 mi (9,066.15 km) |
| Santarem to Ojus (Florida) | 4,154.24 mi (6,685.61 km) |
| Santarem to Okemos (Michigan) | 3,820.76 mi (6,148.92 km) |
| Santarem to Oklahoma City (Oklahoma) | 4,675.70 mi (7,524.81 km) |
| Santarem to Okmulgee (Oklahoma) | 4,599.05 mi (7,401.46 km) |
| Santarem to Olathe (Kansas) | 4,424.98 mi (7,121.31 km) |
| Santarem to Old Jamestown (Missouri) | 4,214.70 mi (6,782.91 km) |
| Santarem to Oldsmar (Florida) | 4,209.14 mi (6,773.95 km) |
| Santarem to Olean (New York) | 3,556.35 mi (5,723.40 km) |
| Santarem to Olive Branch (Mississippi) | 4,326.26 mi (6,962.45 km) |
| Santarem to Olivehurst (California) | 5,562.07 mi (8,951.29 km) |
| Santarem to Olney (Maryland) | 3,568.13 mi (5,742.36 km) |
| Santarem to Olympia (Washington) | 5,232.69 mi (8,421.21 km) |
