| Klamath Falls to Olivares | 5,606.67 mi (9,023.07 km) |
| Klamath Falls to Olivenza | 5,507.20 mi (8,862.98 km) |
| Klamath Falls to Olot | 5,653.33 mi (9,098.15 km) |
| Klamath Falls to Onate | 5,448.85 mi (8,769.08 km) |
| Klamath Falls to Onda | 5,682.66 mi (9,145.35 km) |
| Klamath Falls to Onteniente | 5,731.64 mi (9,224.19 km) |
| Klamath Falls to Orihuela | 5,759.02 mi (9,268.25 km) |
| Klamath Falls to Osuna | 5,654.83 mi (9,100.57 km) |
| Klamath Falls to Ourense | 5,296.95 mi (8,524.61 km) |
| Klamath Falls to Oviedo | 5,316.27 mi (8,555.71 km) |
| Klamath Falls to Paiporta | 5,705.89 mi (9,182.74 km) |
| Klamath Falls to Pajara | 5,737.40 mi (9,233.46 km) |
| Klamath Falls to Palafolls | 5,689.52 mi (9,156.40 km) |
| Klamath Falls to Palafrugell | 5,689.03 mi (9,155.61 km) |
| Klamath Falls to Palamos | 5,691.87 mi (9,160.17 km) |
