| Wallingford Center to Oerlinghausen | 3,721.31 mi (5,988.87 km) |
| Wallingford Center to Oestrich-Winkel | 3,749.69 mi (6,034.54 km) |
| Wallingford Center to Offenburg | 3,791.34 mi (6,101.57 km) |
| Wallingford Center to Oftersheim | 3,791.59 mi (6,101.97 km) |
| Wallingford Center to Ohrdruf | 3,834.89 mi (6,171.66 km) |
| Wallingford Center to Ohringen | 3,833.91 mi (6,170.09 km) |
| Wallingford Center to Olbernhau | 3,941.84 mi (6,343.78 km) |
| Wallingford Center to Olching | 3,938.86 mi (6,338.98 km) |
| Wallingford Center to Oldenburg | 3,672.21 mi (5,909.85 km) |
| Wallingford Center to Oldenburg in Holstein | 3,741.96 mi (6,022.11 km) |
| Wallingford Center to Olfen | 3,677.67 mi (5,918.64 km) |
| Wallingford Center to Olpe | 3,714.53 mi (5,977.96 km) |
| Wallingford Center to Olsberg | 3,731.11 mi (6,004.64 km) |
| Wallingford Center to Oranienburg | 3,874.16 mi (6,234.85 km) |
| Wallingford Center to Ortenberg | 3,782.00 mi (6,086.55 km) |
