| Buffalo to Olivares | 3,736.59 mi (6,013.47 km) |
| Buffalo to Olivenza | 3,648.20 mi (5,871.21 km) |
| Buffalo to Olot | 3,965.51 mi (6,381.87 km) |
| Buffalo to Onate | 3,719.36 mi (5,985.73 km) |
| Buffalo to Onda | 3,920.76 mi (6,309.85 km) |
| Buffalo to Onteniente | 3,945.75 mi (6,350.07 km) |
| Buffalo to Orihuela | 3,956.65 mi (6,367.62 km) |
| Buffalo to Osuna | 3,792.73 mi (6,103.82 km) |
| Buffalo to Ourense | 3,495.31 mi (5,625.16 km) |
| Buffalo to Oviedo | 3,555.52 mi (5,722.06 km) |
| Buffalo to Paiporta | 3,932.72 mi (6,329.11 km) |
| Buffalo to Pajara | 3,679.52 mi (5,921.62 km) |
| Buffalo to Palafolls | 3,995.26 mi (6,429.75 km) |
| Buffalo to Palafrugell | 4,004.58 mi (6,444.75 km) |
| Buffalo to Palamos | 4,005.64 mi (6,446.45 km) |
