| Sankt Gallen to Oswego (Illinois) | 4,494.05 mi (7,232.48 km) |
| Sankt Gallen to Oswego (New York) | 3,951.69 mi (6,359.63 km) |
| Sankt Gallen to Otsego (Minnesota) | 4,519.62 mi (7,273.62 km) |
| Sankt Gallen to Ottawa (Illinois) | 4,528.00 mi (7,287.12 km) |
| Sankt Gallen to Ottawa (Kansas) | 4,904.57 mi (7,893.14 km) |
| Sankt Gallen to Ottumwa (Iowa) | 4,679.55 mi (7,531.00 km) |
| Sankt Gallen to Overland (Missouri) | 4,713.50 mi (7,585.64 km) |
| Sankt Gallen to Overland Park (Kansas) | 4,868.70 mi (7,835.42 km) |
| Sankt Gallen to Overlea (Maryland) | 4,124.75 mi (6,638.14 km) |
| Sankt Gallen to Oviedo (Florida) | 4,813.96 mi (7,747.31 km) |
| Sankt Gallen to Owasso (Oklahoma) | 5,041.95 mi (8,114.24 km) |
| Sankt Gallen to Owatonna (Minnesota) | 4,561.80 mi (7,341.51 km) |
| Sankt Gallen to Owensboro (Kentucky) | 4,630.41 mi (7,451.93 km) |
| Sankt Gallen to Owings Mills (Maryland) | 4,134.13 mi (6,653.24 km) |
| Sankt Gallen to Owosso (Michigan) | 4,274.43 mi (6,879.03 km) |
