| Quarteira to Oakley (California) | 5,744.68 mi (9,245.17 km) |
| Quarteira to Oakton (Virginia) | 3,675.94 mi (5,915.85 km) |
| Quarteira to Oakville (Missouri) | 4,328.65 mi (6,966.29 km) |
| Quarteira to Oatfield (Oregon) | 5,433.06 mi (8,743.66 km) |
| Quarteira to Ocala (Florida) | 4,212.33 mi (6,779.08 km) |
| Quarteira to Ocean Acres (New Jersey) | 3,504.01 mi (5,639.16 km) |
| Quarteira to Ocean City (New Jersey) | 3,531.20 mi (5,682.91 km) |
| Quarteira to Ocean Pines (Maryland) | 3,580.02 mi (5,761.49 km) |
| Quarteira to Ocean Pointe (Hawaii) | 7,952.48 mi (12,798.27 km) |
| Quarteira to Ocean Springs (Mississippi) | 4,517.71 mi (7,270.56 km) |
| Quarteira to Oceanside (California) | 5,779.23 mi (9,300.78 km) |
| Quarteira to Oceanside (New York) | 3,451.90 mi (5,555.30 km) |
| Quarteira to Ocoee (Florida) | 4,199.42 mi (6,758.31 km) |
| Quarteira to Oconomowoc (Wisconsin) | 4,103.87 mi (6,604.54 km) |
| Quarteira to Odenton (Maryland) | 3,641.07 mi (5,859.73 km) |
