| Zionsville to Oerlinghausen | 4,303.06 mi (6,925.10 km) |
| Zionsville to Oestrich-Winkel | 4,347.43 mi (6,996.51 km) |
| Zionsville to Offenburg | 4,399.76 mi (7,080.72 km) |
| Zionsville to Oftersheim | 4,392.32 mi (7,068.75 km) |
| Zionsville to Ohrdruf | 4,420.03 mi (7,113.35 km) |
| Zionsville to Ohringen | 4,433.58 mi (7,135.16 km) |
| Zionsville to Olbernhau | 4,521.42 mi (7,276.53 km) |
| Zionsville to Olching | 4,540.65 mi (7,307.48 km) |
| Zionsville to Oldenburg | 4,245.90 mi (6,833.11 km) |
| Zionsville to Oldenburg in Holstein | 4,300.05 mi (6,920.27 km) |
| Zionsville to Olfen | 4,264.32 mi (6,862.75 km) |
| Zionsville to Olpe | 4,305.34 mi (6,928.77 km) |
| Zionsville to Olsberg | 4,317.92 mi (6,949.02 km) |
| Zionsville to Oranienburg | 4,438.53 mi (7,143.13 km) |
| Zionsville to Ortenberg | 4,374.68 mi (7,040.37 km) |
