| Mattoon to Olivares | 4,284.23 mi (6,894.81 km) |
| Mattoon to Olivenza | 4,196.03 mi (6,752.86 km) |
| Mattoon to Olot | 4,509.39 mi (7,257.16 km) |
| Mattoon to Onate | 4,264.54 mi (6,863.11 km) |
| Mattoon to Onda | 4,467.61 mi (7,189.92 km) |
| Mattoon to Onteniente | 4,493.21 mi (7,231.13 km) |
| Mattoon to Orihuela | 4,504.39 mi (7,249.11 km) |
| Mattoon to Osuna | 4,340.46 mi (6,985.29 km) |
| Mattoon to Ourense | 4,042.58 mi (6,505.91 km) |
| Mattoon to Oviedo | 4,101.61 mi (6,600.90 km) |
| Mattoon to Paiporta | 4,479.90 mi (7,209.70 km) |
| Mattoon to Pajara | 4,208.62 mi (6,773.12 km) |
| Mattoon to Palafolls | 4,539.57 mi (7,305.73 km) |
| Mattoon to Palafrugell | 4,548.42 mi (7,319.97 km) |
| Mattoon to Palamos | 4,549.57 mi (7,321.82 km) |
