| College to Olympia Heights (Florida) | 3,962.67 mi (6,377.30 km) |
| College to Omaha (Nebraska) | 2,582.64 mi (4,156.36 km) |
| College to On Top of the World Designated Place (Florida) | 3,700.31 mi (5,955.07 km) |
| College to Onalaska (Wisconsin) | 2,573.39 mi (4,141.47 km) |
| College to Oneida (New York) | 3,073.99 mi (4,947.11 km) |
| College to Oneonta (New York) | 3,126.51 mi (5,031.64 km) |
| College to Ontario (California) | 2,474.78 mi (3,982.78 km) |
| College to Ontario (Oregon) | 1,862.40 mi (2,997.25 km) |
| College to Opa-locka (Florida) | 3,954.36 mi (6,363.92 km) |
| College to Opelika (Alabama) | 3,396.46 mi (5,466.07 km) |
| College to Opelousas (Louisiana) | 3,334.29 mi (5,366.03 km) |
| College to Orange (California) | 2,485.46 mi (3,999.95 km) |
| College to Orange (Texas) | 3,312.15 mi (5,330.38 km) |
| College to Orange City (Florida) | 3,739.66 mi (6,018.41 km) |
| College to Orangeburg (South Carolina) | 3,478.11 mi (5,597.48 km) |
