| Port Code | Port Name | Country |
| USBWI | Baltimore-Washington Int Apt | United States |
| USBWK | Blowing Rock | United States |
| USBWL | Blackwell | United States |
| USBWM | Bowman | United States |
| USBWN | Bowerston | United States |
| USBWO | Bowling Green | United States |
| USBWP | Baldwin Park | United States |
| USBWQ | Broken Arrow | United States |
| USBWR | Bellmawr | United States |
| USBWS | Blaine | United States |
| USBWT | Braithwaite | United States |
| USBWU | Baldwyn | United States |
| USBWV | Bowmansville | United States |
| USBWW | Brownton | United States |
| USBWX | Bon Wier | United States |
| USBWY | Berwyn | United States |
| USBWZ | Brewster | United States |
| USBXA | Bogalusa | United States |
| USBXB | Breaux Bridge | United States |
| USBXC | Boxborough | United States |
| USBXD | Breese | United States |
| USBXE | Bremen | United States |
| USBXF | Brentwood | United States |
| USBXG | Brentwood | United States |
| USBXH | Brewer | United States |
| USBXI | Brewster | United States |
| USBXJ | Brewton | United States |
| USBXK | Buckeye | United States |
| USBXL | Brian | United States |
| USBXM | Bridgeport | United States |
| USBXN | Benton | United States |
| USBXO | Bladenboro | United States |
| USBXP | Box Springs | United States |
| USBXQ | Brodnax | United States |
| USBXR | Baxter | United States |
| USBXS | Borrego Springs | United States |
| USBXT | Bauxite | United States |
| USBXU | Brownfield | United States |
| USBXV | Brownstown | United States |
| USBXW | Bucyrus | United States |
| USBXX | Brandon | United States |
| USBXY | Bixby | United States |
| USBXZ | Blairs | United States |
| USBYA | Boundary | United States |
| USBYB | Boynton Beach | United States |
| USBYC | Boyceville | United States |
| USBYD | Bayard | United States |
| USBYE | Bryn Mawr | United States |
| USBYF | Bryson City | United States |
| USBYG | Buffalo | United States |
| USBYH | Blytheville | United States |
| USBYI | Rupert-Burley Apt | United States |
| USBYI | Burley-Rupert Apt | United States |
| USBYJ | Broadway | United States |
| USBYK | Byron Center | United States |
| USBYL | Bradley | United States |
| USBYM | Byram | United States |
| USBYN | Burney | United States |
| USBYO | Burnsville | United States |
| USBYP | Burley | United States |
| USBYQ | Byberry | United States |
| USBYR | Byron | United States |
| USBYS | Fort Irwin | United States |
| USBYT | Bay Meadows | United States |
| USBYU | Bayou la Batre | United States |
| USBYV | Berryville | United States |
| USBYW | Blakely Island | United States |
| USBYX | Baxley | United States |
| USBYY | Breckenridge | United States |
| USBZB | Baltimore | United States |
| USBZC | Barnesville | United States |
| USBZH | Bethesda | United States |
| USBZL | Bristol | United States |
| USBZM | Bozeman | United States |
| USBZN | Bozeman | United States |
| USBZO | Bend | United States |
| USBZT | Brazoria | United States |
| USBZW | Barstow | United States |
| USBZY | Blue Springs | United States |
| USBZZ | Blacklick | United States |
| USCAA | Calimesa | United States |
| USCAB | Canby | United States |
| USCAC | Cactus | United States |
| USCAD | Cadillac | United States |
| USCAE | Columbia | United States |
| USCAF | Columbia Station | United States |
| USCAG | Calistoga | United States |
| USCAH | Calhoun | United States |
| USCAI | Chapin | United States |
| USCAJ | Columbia City | United States |
| USCAK | Clark Fork | United States |
| USCAL | Calais | United States |
| USCAM | Cambridge City | United States |
| USCAN | Camanche | United States |
| USCAO | Clayton | United States |
| USCAP | Capitan | United States |
| USCAQ | Caldwell | United States |
| USCAR | Caribou | United States |
| USCAS | Castine | United States |
| USCAT | Camden | United States |