| Storm Lake to Oerlinghausen | 4,480.69 mi (7,210.97 km) |
| Storm Lake to Oestrich-Winkel | 4,541.65 mi (7,309.08 km) |
| Storm Lake to Offenburg | 4,605.21 mi (7,411.36 km) |
| Storm Lake to Oftersheim | 4,589.18 mi (7,385.57 km) |
| Storm Lake to Ohrdruf | 4,599.38 mi (7,401.99 km) |
| Storm Lake to Ohringen | 4,628.63 mi (7,449.06 km) |
| Storm Lake to Olbernhau | 4,693.22 mi (7,553.00 km) |
| Storm Lake to Olching | 4,736.50 mi (7,622.66 km) |
| Storm Lake to Oldenburg | 4,416.04 mi (7,106.93 km) |
| Storm Lake to Oldenburg in Holstein | 4,453.31 mi (7,166.91 km) |
| Storm Lake to Olfen | 4,447.80 mi (7,158.04 km) |
| Storm Lake to Olpe | 4,492.64 mi (7,230.20 km) |
| Storm Lake to Olsberg | 4,500.71 mi (7,243.19 km) |
| Storm Lake to Oranienburg | 4,595.79 mi (7,396.22 km) |
| Storm Lake to Ortenberg | 4,562.91 mi (7,343.30 km) |
