| Kennewick to Orbetello | 5,598.06 mi (9,009.20 km) |
| Kennewick to Oria | 5,881.46 mi (9,465.30 km) |
| Kennewick to Oristano | 5,670.99 mi (9,126.57 km) |
| Kennewick to Orta Nova | 5,782.63 mi (9,306.25 km) |
| Kennewick to Orte | 5,628.47 mi (9,058.15 km) |
| Kennewick to Ortona | 5,687.91 mi (9,153.80 km) |
| Kennewick to Orvieto | 5,605.93 mi (9,021.88 km) |
| Kennewick to Orzinuovi | 5,391.61 mi (8,676.96 km) |
| Kennewick to Osimo | 5,596.90 mi (9,007.34 km) |
| Kennewick to Ospitaletto | 5,386.36 mi (8,668.51 km) |
| Kennewick to Ostuni | 5,866.04 mi (9,440.47 km) |
| Kennewick to Ottaviano | 5,779.39 mi (9,301.02 km) |
| Kennewick to Ovada | 5,400.56 mi (8,691.37 km) |
| Kennewick to Ozieri | 5,643.81 mi (9,082.83 km) |
| Kennewick to Paceco | 5,897.04 mi (9,490.36 km) |
