| Chapel Hill to Olivares | 3,933.10 mi (6,329.71 km) |
| Chapel Hill to Olivenza | 3,852.34 mi (6,199.73 km) |
| Chapel Hill to Olot | 4,225.58 mi (6,800.41 km) |
| Chapel Hill to Onate | 3,972.57 mi (6,393.23 km) |
| Chapel Hill to Onda | 4,156.19 mi (6,688.74 km) |
| Chapel Hill to Onteniente | 4,171.36 mi (6,713.16 km) |
| Chapel Hill to Orihuela | 4,175.50 mi (6,719.82 km) |
| Chapel Hill to Osuna | 3,991.19 mi (6,423.20 km) |
| Chapel Hill to Ourense | 3,728.47 mi (6,000.39 km) |
| Chapel Hill to Oviedo | 3,802.54 mi (6,119.60 km) |
| Chapel Hill to Paiporta | 4,163.58 mi (6,700.64 km) |
| Chapel Hill to Pajara | 3,766.63 mi (6,061.81 km) |
| Chapel Hill to Palafolls | 4,252.32 mi (6,843.45 km) |
| Chapel Hill to Palafrugell | 4,264.62 mi (6,863.25 km) |
| Chapel Hill to Palamos | 4,265.06 mi (6,863.95 km) |
