Enter city, state, or port code.
Name / Location   | State  | Airport Code | Port Code |
| Oakland | California | OAK | 2811 |
| Oklahoma City | Oklahoma | OKC | 5504 |
| Oleum | California | 2829 | |
| Olympia | Washington | OLM | 3026 |
| Omaha | Nebraska | OMA | 3903 |
| Ontario International Airport | California | ONT | 2721 |
| Orlando | Florida | MCO | 1808 |
| Otay Mesa Station | California | 2506 | |
| Owensboro | Kentucky | OWB | 4116 |
| Oxnard / Ventura | California | OXR | 2712 |
| Panama City | Florida | PFN | 1818 |
| Pearl Harbor | Hawaii | HNL | 3201 |
| Pelican | Alaska | 3124 | |
| Pensacola | Florida | PNS | 1819 |
| Peoria | Illinois | PIA | 3902 |
| Petersburg | Alaska | PSG | 3112 |
| Philadelphia | Pennsylvania | PHL | 1101 |
| Philadelphia International Airport | Pennsylvania | PHL | 1108 |
| Phoenix | Arizona | PHX | 2605 |
| Pigeon Point | Delaware | 1103 | |
| Pittsburg | California | 2828 | |
| Pittsburgh | Pennsylvania | PIT | 1104 |
| Plymouth | Massachusetts | PYM | 0406 |
| Pontiac Airport Detroit | Michigan | DTW | 3881 |
| Port Angeles | Washington | CLM | 3007 |
