| Serik to Oerlinghausen | 1,506.91 mi (2,425.14 km) |
| Serik to Oestrich-Winkel | 1,459.15 mi (2,348.27 km) |
| Serik to Offenburg | 1,412.66 mi (2,273.46 km) |
| Serik to Oftersheim | 1,415.11 mi (2,277.40 km) |
| Serik to Ohrdruf | 1,388.75 mi (2,234.98 km) |
| Serik to Ohringen | 1,373.40 mi (2,210.28 km) |
| Serik to Olbernhau | 1,292.50 mi (2,080.08 km) |
| Serik to Olching | 1,267.00 mi (2,039.04 km) |
| Serik to Oldenburg | 1,569.72 mi (2,526.23 km) |
| Serik to Oldenburg in Holstein | 1,536.86 mi (2,473.35 km) |
| Serik to Olfen | 1,543.07 mi (2,483.33 km) |
| Serik to Olpe | 1,501.08 mi (2,415.75 km) |
| Serik to Olsberg | 1,489.60 mi (2,397.28 km) |
| Serik to Oranienburg | 1,393.18 mi (2,242.11 km) |
| Serik to Ortenberg | 1,431.57 mi (2,303.89 km) |
