| San Gwann to Odessa (Texas) | 6,220.74 mi (10,011.31 km) |
| San Gwann to Ogden (Utah) | 6,120.78 mi (9,850.45 km) |
| San Gwann to Oildale (California) | 6,672.17 mi (10,737.82 km) |
| San Gwann to Ojus (Florida) | 5,430.14 mi (8,738.97 km) |
| San Gwann to Okemos (Michigan) | 4,988.16 mi (8,027.66 km) |
| San Gwann to Oklahoma City (Oklahoma) | 5,848.56 mi (9,412.34 km) |
| San Gwann to Okmulgee (Oklahoma) | 5,777.71 mi (9,298.32 km) |
| San Gwann to Olathe (Kansas) | 5,583.06 mi (8,985.06 km) |
| San Gwann to Old Jamestown (Missouri) | 5,392.73 mi (8,678.77 km) |
| San Gwann to Oldsmar (Florida) | 5,474.31 mi (8,810.05 km) |
| San Gwann to Olean (New York) | 4,749.71 mi (7,643.91 km) |
| San Gwann to Olive Branch (Mississippi) | 5,534.74 mi (8,907.30 km) |
| San Gwann to Olivehurst (California) | 6,546.61 mi (10,535.75 km) |
| San Gwann to Olney (Maryland) | 4,789.02 mi (7,707.19 km) |
| San Gwann to Olympia (Washington) | 6,126.90 mi (9,860.29 km) |
