| 301 | JAV | Jordan Enterprise for Air Navigation and Aviation | IATA: R5, Callsign: Jordan Aviation, IATA Prefix: 151, IATA designator changed to R5 | JOR | AVCODES |
| 302 | JAV | Janes Aviation Ltd. | Callsign: Janes, | GB | AVCODES |
| 303 | JAV | Jordan Enterprise for Air Navigation and Aviation | IATA: R5, Callsign: Jordan Aviation, IATA Prefix: 151, IATA designator changed from R5* | JOR | AVCODES |
| 304 | JAV | Jordan Aviation | IATA: R5 | | ICAO1 |
| 305 | JAV | Jordan Aviation | | JOR | TRAFFIC |
| 306 | JAVU | JAWAD GROUP LTD | | | SCAC4 |
| 307 | JAVYS | Jadrová a vyradovacia spoločnost, a.s. | | SK | VKM |
| 308 | JAW | Jamahiriya Airways | Callsign: JAW, | LAR | AVCODES |
| 309 | JAW | Jasmin Airways | IATA: JO, Callsign: Jasmine, | TN | AVCODES |
| 310 | JAW | Jamahiriya Airways | | | ICAO1 |
| 311 | JAWA | JAWANDA TRANSPORT LTD | | | SCAC4 |
| 312 | JAWC | JAMESWAY CONSTRUCTION INC | | | SCAC4 |
| 313 | JAWE | JAW TRANSPORTATION LLC | | | SCAC4 |
| 314 | JAWH | JACOBSON TRANSPORTATION COMPANY INC | | | SCAC4 |
| 315 | JAWN | J A TRUCKING INC | | | SCAC4 |
| 316 | JAWO | JACOBSON TRANSPORTATION COMPANY INC | | | SCAC4 |
| 317 | JAWOR | PKM Jaworzno | | PL | TRAFFIC |
| 318 | JAWR | JAWS TRANSPORTATION | | | SCAC4 |
| 319 | JAWT | JAWS TRUCKING | | | SCAC4 |
| 320 | JAWV | JACOBSON TRANSPORTATION COMPANY INC | | | SCAC4 |
| 321 | JAX | Janair, Inc. | Callsign: Janair, | USA | AVCODES |
| 322 | JAX | Janair | | | ICAO1 |
| 323 | JAXA | J A TRANSPORTATION | | | SCAC4 |
| 324 | JAXB | JPTS AUTO TRANSPORT BROKERS INC | | | SCAC4 |
| 325 | JAXC | JAX INC | | | SCAC4 |
| 326 | JAXE | JASPERS EXPRESS LINE | | | SCAC4 |
| 327 | JAXG | JAX LOGISTICS LLC | | | SCAC4 |
| 328 | JAXJ | J & A TRANSPORT 2010 LTD | | | SCAC4 |
| 329 | JAXP | JASON EXPRESS INC | | | SCAC4 |
| 330 | JAXQ | J A S TRANSPORT INC | | | SCAC4 |
| 331 | JAXR | J & A TRANSPORTATION LLC | | | SCAC4 |
| 332 | JAXS | JAX TRANSPORTATION | | | SCAC4 |
| 333 | JAXT | JA TRANSPORT | | | SCAC4 |
| 334 | JAXW | JAX TRANSPORT LLC | | | SCAC4 |
| 335 | JAXY | JAX TRANSPORTATION LLC | | | SCAC4 |
| 336 | JAY | J & J Air Charters Ltd. | Callsign: Jay, | GB | AVCODES |
| 337 | JAY | African Alliance Airlines | Callsign: Afric Alliance, | WAG | AVCODES |
| 338 | JAYA | JAYA EXPRESS INC | | | SCAC4 |
| 339 | JAYB | JAYBYRD DELIVERIES | | | SCAC4 |
| 340 | JAYK | JAYCEE LOGISTICS | | | SCAC4 |
| 341 | JAYM | JAY-MAR LEASING, INC | | | SCAC1 |
| 342 | JAYM | JAYMAR PRODUCE INC | | | SCAC4 |
| 343 | JAYN | JAYCO INTERNATIONAL TRANSPORTERS IN | | | SCAC4 |
| 344 | JAYS | JAYSON OIL CO | | | SCAC4 |
| 345 | JAYT | JAYHAWK TRANSPORT LLC | | | SCAC4 |
| 346 | JAYU | JAY CONTAINER SERVICES COMPANY PVT. LTD. | | IND | BIC |
| 347 | JAYU | JAY CONTAINER SERVICES COMPANY PVT | | | SCAC4 |
| 348 | JAYW | JAYS TRANSPORT | | | SCAC4 |
| 349 | JAZ | Japan Air Charter Co. Ltd. | IATA: JO, IATA Prefix: 708, IATA designator changed from JZ* | J | AVCODES |
| 350 | JAZ | Japan Air Charter Co. Ltd. | IATA: JO, IATA Prefix: 708, Change of name to JALWays | J | AVCODES |
| 351 | JAZ | JALWays Co. Ltd. | IATA: JO, Callsign: Jalways, IATA Prefix: 708, JALways Co., Ltd. has been integrated into Japan Airlines International Co., Ltd. on 01 December 2010. Change of name from Japan Air Charter Co., Ltd. ICAO callsign changed from J-ways | J | AVCODES |
| 352 | JAZ | JALWays Co. Ltd. | IATA: JZ, IATA Prefix: 708, IATA designator changed to JO | J | AVCODES |
| 353 | JAZ | JALWays Co. Ltd. | IATA: JO, Callsign: J-Ways, IATA Prefix: 708, Change of name from Japan Air Charter Co., Ltd. ICAO callsign changed to Jalways | J | AVCODES |
| 354 | JAZ | Jav-Avia Ltd | Callsign: Javavia, | GE | AVCODES |
| 355 | JAZ | JALways | IATA: JO | | ICAO1 |
| 356 | JAZ | JALways | | J | TRAFFIC |
| 357 | JAZF | JASZTEX FIBERS INC | | | SCAC4 |
| 358 | JB | Helijet International, Inc. | ICAO: JBA, Callsign: Helijet, IATA Prefix: 613, Designator JB recalled by IATA. Name changed from Helijet Airways. | CDN | AVCODES |
| 359 | JB | Aeronaves del Norte, S.A. | | MEX | AVCODES |
| 360 | JB | British Caledonian Airways (Charter) Limited | ICAO: BCC, | GB | AVCODES |
| 361 | JB | Jungfraubahn | | CH | TRAFFIC |
| 362 | JB | Jungfraubahn | | CH | VKM |
| 363 | JBA | Helijet International, Inc. | IATA: JB, Callsign: Helijet, IATA Prefix: 613, Designator JB recalled by IATA. Name changed from Helijet Airways. | CDN | AVCODES |
| 364 | JBA | Helijet Airways | Callsign: Helijet, Name changed to Helijet International, Inc. | CDN | AVCODES |
| 365 | JBA | Helijet International, Inc. | Callsign: Helijet, Designator JB recalled by IATA. Name changed from Helijet Airways. | CDN | AVCODES |
| 366 | JBA | Helijet | IATA: JB | | ICAO1 |
| 367 | JBAC | JBA COMPANY | | | SCAC4 |
| 368 | JBAD | JBAD TRUCKING INC | | | SCAC4 |
| 369 | JBAI | J B TRANSPORT INC | | | SCAC4 |
| 370 | JBAJ | JIMENEZ BROS ART AND IRON WORKS INC | | | SCAC4 |
| 371 | JBAO | JAXZEN BROWN AND CO. | | | SCAC4 |
| 372 | JBAW | JETBLUE AIRWAYS (SEKO WORLDWIDE AGE | | | SCAC4 |
| 373 | JBAX | Estate of J.B. Atkins | 7/1935 | | NAKINA |
| 374 | JBBD | JESPERSEN BOAT BUILDERS | | | SCAC4 |
| 375 | JBBE | J B B EXPRESS INC | | | SCAC4 |
| 376 | JBBF | J BAR B FOODS | | | SCAC4 |
| 377 | JBBI | JOHNSON BROTHERS BROKERAGE INC | | | SCAC4 |
| 378 | JBBS | JABBUSCH, S TRANSPORT LTD | | | SCAC4 |
| 379 | JBBX | James B. Berry Sons' Co., Inc. | 1/1941 | | NAKINA |
| 380 | JBBX | James B. Berry's Sons Co. | 8/1920-4/1938 | | NAKINA |
| 381 | JBBX | James B. Berry Sons' Co., Inc. | Apr-38 | | NRHS |
| 382 | JBBX | JAMES B. BERRY SONS CO. INC. | | | PWRC |
| 383 | JBC | Jetbee Czech s.r.o. | Callsign: Jetbee, Name changed from Praga Aviation S.r.o. ICAO designator changed from PGG. | CZ | AVCODES |
| 384 | JBCC | JOSH BULK CARRIERS INC | | | SCAC4 |
| 385 | JBCG | JB CARTAGE INC | | | SCAC4 |
| 386 | JBCI | JBC TRANSPORTATION INC | | | SCAC4 |
| 387 | JBCK | J & B TRUCKING | | | SCAC4 |
| 388 | JBCN | J B C INC | | | SCAC4 |
| 389 | JBCP | JBC TRANSPORT GROUP LLC | | | SCAC4 |
| 390 | JBCQ | J B C TRANSPORT INC | | | SCAC4 |
| 391 | JBCU | JACK B KELLEY INC | | | SCAC4 |
| 392 | JBCX | James B. Clow & Sons | 7/1930-7/1932; 7/1937 (not listed); 4/1938-1/1952 | | NAKINA |
| 393 | JBCX | James B. Clow & Sons | 4/38-1/52 | | NRHS |
| 394 | JBCX | JAMES B. CLOW & SONS | | | PWRC |
| 395 | JBCZ | JACK BEAN CO. | | | PWRC |
| 396 | JBD | Jetbird Limited | Callsign: Smartbird, | IRL | AVCODES |
| 397 | JBDL | JBS CARRIERS INC (LOGISTICS) | | | SCAC4 |
| 398 | JBDN | JBS DISTRIBUTION | | | SCAC4 |
| 399 | JBDT | JOHNSON, BRAD D TRUCKING INC | | | SCAC4 |
| 400 | JBE | Jet Bear Co., Ltd | Callsign: Jet Bear, Name changed to Sinojet (Beijing) Co., Ltd. | PRC | AVCODES |
