| Gislaved to Olympia Heights (Florida) | 4,877.07 mi (7,848.88 km) |
| Gislaved to Omaha (Nebraska) | 4,507.49 mi (7,254.11 km) |
| Gislaved to On Top of the World Designated Place (Florida) | 4,754.29 mi (7,651.29 km) |
| Gislaved to Onalaska (Wisconsin) | 4,216.94 mi (6,786.51 km) |
| Gislaved to Oneida (New York) | 3,767.67 mi (6,063.47 km) |
| Gislaved to Oneonta (New York) | 3,779.83 mi (6,083.05 km) |
| Gislaved to Ontario (California) | 5,515.91 mi (8,876.99 km) |
| Gislaved to Ontario (Oregon) | 4,876.51 mi (7,847.99 km) |
| Gislaved to Opa-locka (Florida) | 4,864.13 mi (7,828.07 km) |
| Gislaved to Opelika (Alabama) | 4,659.47 mi (7,498.69 km) |
| Gislaved to Opelousas (Louisiana) | 5,003.25 mi (8,051.95 km) |
| Gislaved to Orange (California) | 5,535.82 mi (8,909.04 km) |
| Gislaved to Orange (Texas) | 5,080.89 mi (8,176.90 km) |
| Gislaved to Orange City (Florida) | 4,729.08 mi (7,610.73 km) |
| Gislaved to Orangeburg (South Carolina) | 4,459.61 mi (7,177.06 km) |
