| San Carlos to Oerlinghausen | 5,585.45 mi (8,988.91 km) |
| San Carlos to Oestrich-Winkel | 5,675.56 mi (9,133.92 km) |
| San Carlos to Offenburg | 5,757.62 mi (9,265.99 km) |
| San Carlos to Oftersheim | 5,725.97 mi (9,215.06 km) |
| San Carlos to Ohrdruf | 5,701.70 mi (9,176.00 km) |
| San Carlos to Ohringen | 5,760.16 mi (9,270.08 km) |
| San Carlos to Olbernhau | 5,775.87 mi (9,295.36 km) |
| San Carlos to Olching | 5,864.70 mi (9,438.33 km) |
| San Carlos to Oldenburg | 5,509.40 mi (8,866.52 km) |
| San Carlos to Oldenburg in Holstein | 5,511.12 mi (8,869.30 km) |
| San Carlos to Olfen | 5,565.50 mi (8,956.80 km) |
| San Carlos to Olpe | 5,615.54 mi (9,037.34 km) |
| San Carlos to Olsberg | 5,614.51 mi (9,035.69 km) |
| San Carlos to Oranienburg | 5,654.06 mi (9,099.33 km) |
| San Carlos to Ortenberg | 5,684.31 mi (9,148.01 km) |
