| Aver-o-Mar to Olympia Heights (Florida) | 4,142.46 mi (6,666.64 km) |
| Aver-o-Mar to Omaha (Nebraska) | 4,313.21 mi (6,941.45 km) |
| Aver-o-Mar to On Top of the World Designated Place (Florida) | 4,110.59 mi (6,615.35 km) |
| Aver-o-Mar to Onalaska (Wisconsin) | 4,008.78 mi (6,451.51 km) |
| Aver-o-Mar to Oneida (New York) | 3,329.36 mi (5,358.08 km) |
| Aver-o-Mar to Oneonta (New York) | 3,317.77 mi (5,339.43 km) |
| Aver-o-Mar to Ontario (California) | 5,544.06 mi (8,922.30 km) |
| Aver-o-Mar to Ontario (Oregon) | 5,048.97 mi (8,125.53 km) |
| Aver-o-Mar to Opa-locka (Florida) | 4,131.27 mi (6,648.63 km) |
| Aver-o-Mar to Opelika (Alabama) | 4,131.08 mi (6,648.32 km) |
| Aver-o-Mar to Opelousas (Louisiana) | 4,540.97 mi (7,307.99 km) |
| Aver-o-Mar to Orange (California) | 5,564.24 mi (8,954.78 km) |
| Aver-o-Mar to Orange (Texas) | 4,638.65 mi (7,465.19 km) |
| Aver-o-Mar to Orange City (Florida) | 4,066.69 mi (6,544.70 km) |
| Aver-o-Mar to Orangeburg (South Carolina) | 3,878.55 mi (6,241.92 km) |
