| San Gwann to Oakley (California) | 6,612.83 mi (10,642.33 km) |
| San Gwann to Oakton (Virginia) | 4,808.65 mi (7,738.78 km) |
| San Gwann to Oakville (Missouri) | 5,410.48 mi (8,707.32 km) |
| San Gwann to Oatfield (Oregon) | 6,212.96 mi (9,998.80 km) |
| San Gwann to Ocala (Florida) | 5,403.92 mi (8,696.78 km) |
| San Gwann to Ocean Acres (New Jersey) | 4,638.99 mi (7,465.73 km) |
| San Gwann to Ocean City (New Jersey) | 4,669.77 mi (7,515.26 km) |
| San Gwann to Ocean Pines (Maryland) | 4,725.16 mi (7,604.42 km) |
| San Gwann to Ocean Pointe (Hawaii) | 8,452.75 mi (13,603.38 km) |
| San Gwann to Ocean Springs (Mississippi) | 5,675.99 mi (9,134.63 km) |
| San Gwann to Oceanside (California) | 6,735.01 mi (10,838.95 km) |
| San Gwann to Oceanside (New York) | 4,579.99 mi (7,370.78 km) |
| San Gwann to Ocoee (Florida) | 5,396.69 mi (8,685.13 km) |
| San Gwann to Oconomowoc (Wisconsin) | 5,144.43 mi (8,279.16 km) |
| San Gwann to Odenton (Maryland) | 4,774.26 mi (7,683.43 km) |
