| Champaign to Olivares | 4,260.19 mi (6,856.12 km) |
| Champaign to Olivenza | 4,171.45 mi (6,713.31 km) |
| Champaign to Olot | 4,480.19 mi (7,210.17 km) |
| Champaign to Onate | 4,236.07 mi (6,817.29 km) |
| Champaign to Onda | 4,440.37 mi (7,146.08 km) |
| Champaign to Onteniente | 4,466.72 mi (7,188.49 km) |
| Champaign to Orihuela | 4,478.42 mi (7,207.32 km) |
| Champaign to Osuna | 4,316.22 mi (6,946.29 km) |
| Champaign to Ourense | 4,015.86 mi (6,462.90 km) |
| Champaign to Oviedo | 4,073.75 mi (6,556.07 km) |
| Champaign to Paiporta | 4,453.00 mi (7,166.41 km) |
| Champaign to Pajara | 4,193.39 mi (6,748.61 km) |
| Champaign to Palafolls | 4,510.58 mi (7,259.07 km) |
| Champaign to Palafrugell | 4,519.18 mi (7,272.92 km) |
| Champaign to Palamos | 4,520.38 mi (7,274.85 km) |
