| Kampenhout to Olympia Heights (Florida) | 4,642.68 mi (7,471.67 km) |
| Kampenhout to Omaha (Nebraska) | 4,480.82 mi (7,211.18 km) |
| Kampenhout to On Top of the World Designated Place (Florida) | 4,554.28 mi (7,329.40 km) |
| Kampenhout to Onalaska (Wisconsin) | 4,178.62 mi (6,724.83 km) |
| Kampenhout to Oneida (New York) | 3,628.30 mi (5,839.18 km) |
| Kampenhout to Oneonta (New York) | 3,631.48 mi (5,844.31 km) |
| Kampenhout to Ontario (California) | 5,595.28 mi (9,004.73 km) |
| Kampenhout to Ontario (Oregon) | 5,000.76 mi (8,047.94 km) |
| Kampenhout to Opa-locka (Florida) | 4,630.25 mi (7,451.66 km) |
| Kampenhout to Opelika (Alabama) | 4,503.65 mi (7,247.92 km) |
| Kampenhout to Opelousas (Louisiana) | 4,879.85 mi (7,853.35 km) |
| Kampenhout to Orange (California) | 5,615.64 mi (9,037.50 km) |
| Kampenhout to Orange (Texas) | 4,966.82 mi (7,993.32 km) |
| Kampenhout to Orange City (Florida) | 4,521.20 mi (7,276.16 km) |
| Kampenhout to Orangeburg (South Carolina) | 4,279.22 mi (6,886.74 km) |
