| Birkenhead to Odessa (Texas) | 4,837.19 mi (7,784.70 km) |
| Birkenhead to Ogden (Utah) | 4,660.82 mi (7,500.87 km) |
| Birkenhead to Oildale (California) | 5,209.03 mi (8,383.12 km) |
| Birkenhead to Ojus (Florida) | 4,278.61 mi (6,885.76 km) |
| Birkenhead to Okemos (Michigan) | 3,621.32 mi (5,827.95 km) |
| Birkenhead to Oklahoma City (Oklahoma) | 4,468.91 mi (7,192.01 km) |
| Birkenhead to Okmulgee (Oklahoma) | 4,405.36 mi (7,089.75 km) |
| Birkenhead to Olathe (Kansas) | 4,194.42 mi (6,750.26 km) |
| Birkenhead to Old Jamestown (Missouri) | 4,027.77 mi (6,482.08 km) |
| Birkenhead to Oldsmar (Florida) | 4,272.48 mi (6,875.90 km) |
| Birkenhead to Olean (New York) | 3,420.27 mi (5,504.39 km) |
| Birkenhead to Olive Branch (Mississippi) | 4,204.82 mi (6,767.01 km) |
| Birkenhead to Olivehurst (California) | 5,074.85 mi (8,167.18 km) |
| Birkenhead to Olney (Maryland) | 3,500.86 mi (5,634.09 km) |
| Birkenhead to Olympia (Washington) | 4,653.75 mi (7,489.48 km) |
