| Tuscaloosa to Olivares | 4,447.27 mi (7,157.19 km) |
| Tuscaloosa to Olivenza | 4,365.43 mi (7,025.48 km) |
| Tuscaloosa to Olot | 4,727.13 mi (7,607.59 km) |
| Tuscaloosa to Onate | 4,475.70 mi (7,202.94 km) |
| Tuscaloosa to Onda | 4,664.01 mi (7,506.01 km) |
| Tuscaloosa to Onteniente | 4,681.25 mi (7,533.74 km) |
| Tuscaloosa to Orihuela | 4,686.64 mi (7,542.42 km) |
| Tuscaloosa to Osuna | 4,505.18 mi (7,250.38 km) |
| Tuscaloosa to Ourense | 4,236.18 mi (6,817.47 km) |
| Tuscaloosa to Oviedo | 4,307.05 mi (6,931.53 km) |
| Tuscaloosa to Paiporta | 4,672.40 mi (7,519.50 km) |
| Tuscaloosa to Pajara | 4,280.41 mi (6,888.65 km) |
| Tuscaloosa to Palafolls | 4,754.79 mi (7,652.10 km) |
| Tuscaloosa to Palafrugell | 4,766.24 mi (7,670.53 km) |
| Tuscaloosa to Palamos | 4,766.86 mi (7,671.53 km) |
