| Wyomissing to Oerlinghausen | 3,895.51 mi (6,269.22 km) |
| Wyomissing to Oestrich-Winkel | 3,925.91 mi (6,318.14 km) |
| Wyomissing to Offenburg | 3,968.81 mi (6,387.18 km) |
| Wyomissing to Oftersheim | 3,968.19 mi (6,386.18 km) |
| Wyomissing to Ohrdruf | 4,009.62 mi (6,452.86 km) |
| Wyomissing to Ohringen | 4,010.42 mi (6,454.15 km) |
| Wyomissing to Olbernhau | 4,115.95 mi (6,623.98 km) |
| Wyomissing to Olching | 4,115.68 mi (6,623.54 km) |
| Wyomissing to Oldenburg | 3,845.29 mi (6,188.40 km) |
| Wyomissing to Oldenburg in Holstein | 3,912.93 mi (6,297.25 km) |
| Wyomissing to Olfen | 3,852.47 mi (6,199.95 km) |
| Wyomissing to Olpe | 3,889.88 mi (6,260.16 km) |
| Wyomissing to Olsberg | 3,905.97 mi (6,286.05 km) |
| Wyomissing to Oranienburg | 4,046.15 mi (6,511.65 km) |
| Wyomissing to Ortenberg | 3,957.64 mi (6,369.20 km) |
