| Shoreline to Olympia (Washington) | 55.75 mi (89.72 km) |
| Shoreline to Olympia Heights (Florida) | 2,730.72 mi (4,394.66 km) |
| Shoreline to Omaha (Nebraska) | 1,362.98 mi (2,193.50 km) |
| Shoreline to On Top of the World Designated Place (Florida) | 2,482.80 mi (3,995.67 km) |
| Shoreline to Onalaska (Wisconsin) | 1,512.16 mi (2,433.59 km) |
| Shoreline to Oneida (New York) | 2,252.05 mi (3,624.32 km) |
| Shoreline to Oneonta (New York) | 2,297.70 mi (3,697.80 km) |
| Shoreline to Ontario (California) | 979.01 mi (1,575.57 km) |
| Shoreline to Ontario (Oregon) | 364.58 mi (586.74 km) |
| Shoreline to Opa-locka (Florida) | 2,725.83 mi (4,386.80 km) |
| Shoreline to Opelika (Alabama) | 2,183.33 mi (3,513.72 km) |
| Shoreline to Opelousas (Louisiana) | 1,990.71 mi (3,203.73 km) |
| Shoreline to Orange (California) | 992.16 mi (1,596.73 km) |
| Shoreline to Orange (Texas) | 1,941.35 mi (3,124.29 km) |
| Shoreline to Orange City (Florida) | 2,535.30 mi (4,080.16 km) |
