| Machelen to Olympia Heights (Florida) | 4,638.38 mi (7,464.75 km) |
| Machelen to Omaha (Nebraska) | 4,478.04 mi (7,206.71 km) |
| Machelen to On Top of the World Designated Place (Florida) | 4,550.21 mi (7,322.85 km) |
| Machelen to Onalaska (Wisconsin) | 4,175.78 mi (6,720.26 km) |
| Machelen to Oneida (New York) | 3,624.74 mi (5,833.45 km) |
| Machelen to Oneonta (New York) | 3,627.86 mi (5,838.47 km) |
| Machelen to Ontario (California) | 5,593.29 mi (9,001.53 km) |
| Machelen to Ontario (Oregon) | 4,999.23 mi (8,045.49 km) |
| Machelen to Opa-locka (Florida) | 4,625.95 mi (7,444.75 km) |
| Machelen to Opelika (Alabama) | 4,499.89 mi (7,241.87 km) |
| Machelen to Opelousas (Louisiana) | 4,876.29 mi (7,847.62 km) |
| Machelen to Orange (California) | 5,613.65 mi (9,034.30 km) |
| Machelen to Orange (Texas) | 4,963.32 mi (7,987.69 km) |
| Machelen to Orange City (Florida) | 4,517.08 mi (7,269.53 km) |
| Machelen to Orangeburg (South Carolina) | 4,275.31 mi (6,880.44 km) |
