| San Gwann to Oswego (Illinois) | 5,194.13 mi (8,359.14 km) |
| San Gwann to Oswego (New York) | 4,618.12 mi (7,432.15 km) |
| San Gwann to Otsego (Minnesota) | 5,260.75 mi (8,466.36 km) |
| San Gwann to Ottawa (Illinois) | 5,227.87 mi (8,413.44 km) |
| San Gwann to Ottawa (Kansas) | 5,613.97 mi (9,034.82 km) |
| San Gwann to Ottumwa (Iowa) | 5,391.69 mi (8,677.09 km) |
| San Gwann to Overland (Missouri) | 5,402.28 mi (8,694.13 km) |
| San Gwann to Overland Park (Kansas) | 5,577.35 mi (8,975.89 km) |
| San Gwann to Overlea (Maryland) | 4,755.83 mi (7,653.77 km) |
| San Gwann to Oviedo (Florida) | 5,376.33 mi (8,652.37 km) |
| San Gwann to Owasso (Oklahoma) | 5,740.15 mi (9,237.88 km) |
| San Gwann to Owatonna (Minnesota) | 5,295.05 mi (8,521.57 km) |
| San Gwann to Owensboro (Kentucky) | 5,297.97 mi (8,526.26 km) |
| San Gwann to Owings Mills (Maryland) | 4,766.90 mi (7,671.58 km) |
| San Gwann to Owosso (Michigan) | 4,967.21 mi (7,993.96 km) |
