| Barstow to Opole | 5,922.97 mi (9,532.10 km) |
| Barstow to Orzesze | 5,972.88 mi (9,612.43 km) |
| Barstow to Osowa | 5,724.53 mi (9,212.74 km) |
| Barstow to Ostroda | 5,800.41 mi (9,334.86 km) |
| Barstow to Ostroleka | 5,873.35 mi (9,452.24 km) |
| Barstow to Ostrow Mazowiecka | 5,896.36 mi (9,489.28 km) |
| Barstow to Ostrow Wielkopolski | 5,864.85 mi (9,438.56 km) |
| Barstow to Ostrowiec Swietokrzyski | 5,993.10 mi (9,644.96 km) |
| Barstow to Ostrzeszow | 5,880.84 mi (9,464.30 km) |
| Barstow to Oswiecim | 5,991.16 mi (9,641.84 km) |
| Barstow to Otwock | 5,921.47 mi (9,529.69 km) |
| Barstow to Ozarow Mazowiecki | 5,904.83 mi (9,502.90 km) |
| Barstow to Ozimek | 5,929.72 mi (9,542.97 km) |
| Barstow to Ozorkow | 5,883.04 mi (9,467.84 km) |
| Barstow to Pabianice | 5,903.48 mi (9,500.73 km) |
