| Appenzell to Oerlinghausen | 321.89 mi (518.02 km) |
| Appenzell to Oestrich-Winkel | 195.25 mi (314.23 km) |
| Appenzell to Offenburg | 104.18 mi (167.66 km) |
| Appenzell to Oftersheim | 145.85 mi (234.73 km) |
| Appenzell to Ohrdruf | 248.69 mi (400.23 km) |
| Appenzell to Ohringen | 129.03 mi (207.66 km) |
| Appenzell to Olbernhau | 290.71 mi (467.86 km) |
| Appenzell to Olching | 106.63 mi (171.61 km) |
| Appenzell to Oldenburg | 404.96 mi (651.72 km) |
| Appenzell to Oldenburg in Holstein | 485.56 mi (781.44 km) |
| Appenzell to Olfen | 316.26 mi (508.98 km) |
| Appenzell to Olpe | 264.34 mi (425.41 km) |
| Appenzell to Olsberg | 280.68 mi (451.72 km) |
| Appenzell to Oranienburg | 410.99 mi (661.42 km) |
| Appenzell to Ortenberg | 209.48 mi (337.12 km) |
