| Birsfelden to Oakley (California) | 5,753.32 mi (9,259.08 km) |
| Birsfelden to Oakton (Virginia) | 4,100.95 mi (6,599.84 km) |
| Birsfelden to Oakville (Missouri) | 4,650.48 mi (7,484.23 km) |
| Birsfelden to Oatfield (Oregon) | 5,341.89 mi (8,596.94 km) |
| Birsfelden to Ocala (Florida) | 4,751.74 mi (7,647.19 km) |
| Birsfelden to Ocean Acres (New Jersey) | 3,937.26 mi (6,336.41 km) |
| Birsfelden to Ocean City (New Jersey) | 3,970.79 mi (6,390.37 km) |
| Birsfelden to Ocean Pines (Maryland) | 4,031.45 mi (6,488.00 km) |
| Birsfelden to Ocean Pointe (Hawaii) | 7,595.59 mi (12,223.92 km) |
| Birsfelden to Ocean Springs (Mississippi) | 4,976.79 mi (8,009.37 km) |
| Birsfelden to Oceanside (California) | 5,897.22 mi (9,490.67 km) |
| Birsfelden to Oceanside (New York) | 3,873.20 mi (6,233.31 km) |
| Birsfelden to Ocoee (Florida) | 4,753.20 mi (7,649.53 km) |
| Birsfelden to Oconomowoc (Wisconsin) | 4,363.20 mi (7,021.88 km) |
| Birsfelden to Odenton (Maryland) | 4,067.77 mi (6,546.44 km) |
