| Zollikon to Oswego (Illinois) | 4,466.97 mi (7,188.89 km) |
| Zollikon to Oswego (New York) | 3,922.55 mi (6,312.74 km) |
| Zollikon to Otsego (Minnesota) | 4,495.28 mi (7,234.45 km) |
| Zollikon to Ottawa (Illinois) | 4,500.92 mi (7,243.53 km) |
| Zollikon to Ottawa (Kansas) | 4,878.21 mi (7,850.72 km) |
| Zollikon to Ottumwa (Iowa) | 4,653.27 mi (7,488.71 km) |
| Zollikon to Overland (Missouri) | 4,685.86 mi (7,541.17 km) |
| Zollikon to Overland Park (Kansas) | 4,842.28 mi (7,792.90 km) |
| Zollikon to Overlea (Maryland) | 4,094.11 mi (6,588.83 km) |
| Zollikon to Oviedo (Florida) | 4,781.19 mi (7,694.58 km) |
| Zollikon to Owasso (Oklahoma) | 5,014.98 mi (8,070.83 km) |
| Zollikon to Owatonna (Minnesota) | 4,536.89 mi (7,301.43 km) |
| Zollikon to Owensboro (Kentucky) | 4,601.64 mi (7,405.62 km) |
| Zollikon to Owings Mills (Maryland) | 4,103.56 mi (6,604.05 km) |
| Zollikon to Owosso (Michigan) | 4,246.83 mi (6,834.61 km) |
