| Fountain Valley to Opole | 6,017.45 mi (9,684.15 km) |
| Fountain Valley to Orzesze | 6,067.34 mi (9,764.44 km) |
| Fountain Valley to Osowa | 5,818.47 mi (9,363.92 km) |
| Fountain Valley to Ostroda | 5,894.27 mi (9,485.91 km) |
| Fountain Valley to Ostroleka | 5,967.09 mi (9,603.10 km) |
| Fountain Valley to Ostrow Mazowiecka | 5,990.09 mi (9,640.12 km) |
| Fountain Valley to Ostrow Wielkopolski | 5,959.23 mi (9,590.46 km) |
| Fountain Valley to Ostrowiec Swietokrzyski | 6,087.16 mi (9,796.34 km) |
| Fountain Valley to Ostrzeszow | 5,975.24 mi (9,616.22 km) |
| Fountain Valley to Oswiecim | 6,085.58 mi (9,793.79 km) |
| Fountain Valley to Otwock | 6,015.39 mi (9,680.84 km) |
| Fountain Valley to Ozarow Mazowiecki | 5,998.79 mi (9,654.13 km) |
| Fountain Valley to Ozimek | 6,024.18 mi (9,694.98 km) |
| Fountain Valley to Ozorkow | 5,977.23 mi (9,619.42 km) |
| Fountain Valley to Pabianice | 5,997.69 mi (9,652.36 km) |
