| CKB | KCKB | Benedum Airport | Clarksburg | |
| UDD | KUDD | Bermuda Dunes Airport | Palm Springs | |
| BTT | PABT | Bettles Airport | Bettles | |
| BVY | KBVY | Beverly Municipal Airport | Beverly | |
| BIC | - | Big Creek Airport | Big Creek | |
| - | KEKS | Big Sky Airport | Ennis | |
| BIF | KBIF | Biggs Army Air Field | El Paso | |
| KBC | - | Birch Creek Airport | Birch Creek | |
| FNT | KFNT | Bishop International Airport | Flint | |
| BIS | KBIS | Bismarck Airport | Bismarck | |
| MBL | KMBL | Blacker Airport | Manistee | |
| BID | KBID | Block Island Airport | Block Island | |
| VBM | - | Blue Mountain Airport | Blue Mountain | |
| - | KMTV | Blue Ridge Airport | Martinsville | |
| BLH | KBLH | Blythe Airport | Blythe | |
| SBS | KSBS | Bob Adams Field | Steamboat Springs | |
| IAN | PAIK | Bob Baker Memorial Airport | Kiana | |
| CEW | KCEW | Bob Sikes Airport | Crestview | |
| - | - | Bob White Field | Zellwood | |
| HBG | KHBG | Bobby L. Chain Municipal Airport | Hattiesburg | |
| BCT | KBCT | Boca Raton Airport | Boca Raton | |
| ASH | KASH | Boire Field | Nashua | |
| HRO | KHRO | Boone County Airport | Harrison | |
| BLD | - | Boulder City Municipal Airport | Boulder City | |
| WBU | - | Boulder Municipal Airport | Boulder | |
| HQM | KHQM | Bowerman Airport | Hoquiam | |
| LOU | KLOU | Bowman Field | Louisville | |
| BZN | KBZN | Bozeman Yellowstone International Airport | Belgrade | |
| BFD | KBFD | Bradford Airport | Bradford | |
| HFD | KHFD | Brainard Airport | Hartford | |
| BKG | KBBG | Branson Airport | Hollister | |
| PWT | KPWT | Bremerton National Airport | Bremerton | |
| KTS | - | Brevig Mission Airport | Teller Mission | |
| BBW | KBBW | Broken Bow Municipal Airport | Broken Bow | |
| WSH | KHWV | Brookhaven Airport | Shirley | |
| RBH | - | Brooks Lodge Airport | Brooks Lodge | |
| - | KBKV | Brooksville-Tampa Bay Regional Airport | Brooksville | |
| SDM | KSDM | Brown Field Municipal Airport | San Diego | |
| BWD | KBWD | Brownwood Regional Airport | Brownwood | |
| DXE | KMBO | Bruce Campbell Field | Madison | |
| NHZ | KNHZ | Brunswick Executive Airport | Brunswick | |
| CCR | KCCR | Buchanan Field | Concord | |
| BKC | PABL | Buckland Airport | Buckland | |
| BYI | KBYI | Burley Municipal Airport | Burley | |
| BRL | KBRL | Burlington Airport | Burlington | |
| - | KBUY | Burlington-Alamance Regional Airport | Burlington | |
| BNO | KBNO | Burns Municipal Airport | Burns | |
| HAO | KHAO | Butler County Regional Airport | Hamilton | |
| BTM | KBTM | Butte Airport | Butte | |
| CCB | KCCB | Cable Airport | Upland | |