| South San Francisco to Olivares | 5,850.21 mi (9,415.00 km) |
| South San Francisco to Olivenza | 5,751.99 mi (9,256.93 km) |
| South San Francisco to Olot | 5,923.31 mi (9,532.64 km) |
| South San Francisco to Onate | 5,712.26 mi (9,193.00 km) |
| South San Francisco to Onda | 5,943.43 mi (9,565.03 km) |
| South San Francisco to Onteniente | 5,989.38 mi (9,638.98 km) |
| South San Francisco to Orihuela | 6,014.52 mi (9,679.44 km) |
| South San Francisco to Osuna | 5,900.07 mi (9,495.24 km) |
| South San Francisco to Ourense | 5,549.34 mi (8,930.79 km) |
| South San Francisco to Oviedo | 5,574.59 mi (8,971.44 km) |
| South San Francisco to Paiporta | 5,965.26 mi (9,600.16 km) |
| South San Francisco to Pajara | 5,936.77 mi (9,554.31 km) |
| South San Francisco to Palafolls | 5,958.99 mi (9,590.07 km) |
| South San Francisco to Palafrugell | 5,959.66 mi (9,591.14 km) |
| South San Francisco to Palamos | 5,962.30 mi (9,595.40 km) |
