| Michigan City to Oerlinghausen | 4,237.80 mi (6,820.09 km) |
| Michigan City to Oestrich-Winkel | 4,286.09 mi (6,897.79 km) |
| Michigan City to Offenburg | 4,341.18 mi (6,986.45 km) |
| Michigan City to Oftersheim | 4,331.67 mi (6,971.14 km) |
| Michigan City to Ohrdruf | 4,355.34 mi (7,009.24 km) |
| Michigan City to Ohringen | 4,372.56 mi (7,036.96 km) |
| Michigan City to Olbernhau | 4,455.17 mi (7,169.90 km) |
| Michigan City to Olching | 4,479.98 mi (7,209.82 km) |
| Michigan City to Oldenburg | 4,178.87 mi (6,725.23 km) |
| Michigan City to Oldenburg in Holstein | 4,229.40 mi (6,806.56 km) |
| Michigan City to Olfen | 4,200.34 mi (6,759.80 km) |
| Michigan City to Olpe | 4,242.31 mi (6,827.34 km) |
| Michigan City to Olsberg | 4,253.87 mi (6,845.94 km) |
| Michigan City to Oranienburg | 4,368.95 mi (7,031.14 km) |
| Michigan City to Ortenberg | 4,311.97 mi (6,939.45 km) |
