| Mattoon to Oerlinghausen | 4,403.44 mi (7,086.66 km) |
| Mattoon to Oestrich-Winkel | 4,449.77 mi (7,161.21 km) |
| Mattoon to Offenburg | 4,503.37 mi (7,247.47 km) |
| Mattoon to Oftersheim | 4,494.99 mi (7,233.98 km) |
| Mattoon to Ohrdruf | 4,520.72 mi (7,275.40 km) |
| Mattoon to Ohringen | 4,536.08 mi (7,300.12 km) |
| Mattoon to Olbernhau | 4,621.30 mi (7,437.27 km) |
| Mattoon to Olching | 4,643.33 mi (7,472.71 km) |
| Mattoon to Oldenburg | 4,345.33 mi (6,993.13 km) |
| Mattoon to Oldenburg in Holstein | 4,397.43 mi (7,076.99 km) |
| Mattoon to Olfen | 4,365.35 mi (7,025.36 km) |
| Mattoon to Olpe | 4,406.85 mi (7,092.15 km) |
| Mattoon to Olsberg | 4,418.93 mi (7,111.57 km) |
| Mattoon to Oranienburg | 4,536.55 mi (7,300.88 km) |
| Mattoon to Ortenberg | 4,476.36 mi (7,204.01 km) |
