| Lake Barcroft to Olympia Heights (Florida) | 925.67 mi (1,489.72 km) |
| Lake Barcroft to Omaha (Nebraska) | 1,010.95 mi (1,626.97 km) |
| Lake Barcroft to On Top of the World Designated Place (Florida) | 734.33 mi (1,181.80 km) |
| Lake Barcroft to Onalaska (Wisconsin) | 805.93 mi (1,297.01 km) |
| Lake Barcroft to Oneida (New York) | 302.19 mi (486.32 km) |
| Lake Barcroft to Oneonta (New York) | 272.03 mi (437.79 km) |
| Lake Barcroft to Ontario (California) | 2,254.05 mi (3,627.55 km) |
| Lake Barcroft to Ontario (Oregon) | 2,072.53 mi (3,335.41 km) |
| Lake Barcroft to Opa-locka (Florida) | 912.77 mi (1,468.97 km) |
| Lake Barcroft to Opelika (Alabama) | 628.21 mi (1,011.01 km) |
| Lake Barcroft to Opelousas (Louisiana) | 1,022.45 mi (1,645.47 km) |
| Lake Barcroft to Orange (California) | 2,271.34 mi (3,655.36 km) |
| Lake Barcroft to Orange (Texas) | 1,118.74 mi (1,800.43 km) |
| Lake Barcroft to Orange City (Florida) | 724.73 mi (1,166.34 km) |
| Lake Barcroft to Orangeburg (South Carolina) | 424.02 mi (682.40 km) |
