| Dunkirk to Olympia Heights (Florida) | 1,159.14 mi (1,865.46 km) |
| Dunkirk to Omaha (Nebraska) | 862.96 mi (1,388.80 km) |
| Dunkirk to On Top of the World Designated Place (Florida) | 938.62 mi (1,510.56 km) |
| Dunkirk to Onalaska (Wisconsin) | 605.58 mi (974.58 km) |
| Dunkirk to Oneida (New York) | 190.62 mi (306.78 km) |
| Dunkirk to Oneonta (New York) | 217.40 mi (349.87 km) |
| Dunkirk to Ontario (California) | 2,136.97 mi (3,439.11 km) |
| Dunkirk to Ontario (Oregon) | 1,880.84 mi (3,026.92 km) |
| Dunkirk to Opa-locka (Florida) | 1,146.79 mi (1,845.58 km) |
| Dunkirk to Opelika (Alabama) | 754.35 mi (1,214.01 km) |
| Dunkirk to Opelousas (Louisiana) | 1,085.41 mi (1,746.79 km) |
| Dunkirk to Orange (California) | 2,155.42 mi (3,468.82 km) |
| Dunkirk to Orange (Texas) | 1,169.06 mi (1,881.43 km) |
| Dunkirk to Orange City (Florida) | 942.22 mi (1,516.36 km) |
| Dunkirk to Orangeburg (South Carolina) | 626.53 mi (1,008.30 km) |
