# List of airline codes (T)

This is a list of all airline codes. The table lists the IATA airline designators, the ICAO airline designators and the airline call signs (telephony designator). Historical assignments are also included for completeness.

## Airline codes for airlines beginning with:

* All
* 0–9
* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z

## Codes

Airline codes :
| IATA | ICAO | Airline | Call sign | Country | Comments |
| TC | ATC | Air Tanzania Company Limited | TANZANIA | Tanzania | |
| 9L | TOW | AirTanker Services | TOWLINE | United Kingdom | |
| DG | SRQ | Cebgo | BLUE JAY | Philippines | Formerly SEAir, South East Asian Airlines and Tigerair Philippines |
| | TLO | Eagle Canyon Airlines | TALON AIR | United States | |
| 1L | OSY | Open Skies Consultative Commission | OPEN SKIES | United States | |
| 2S | TGR | Satgur Air Transport | SATGURAIR | Liberia | defunct |
| DT | DTA | TAAG Angola Airlines | DTA | Angola | |
| | IRF | TA-Air Airline | TA-AIR | Iran | |
| | TBI | TAB Express International | TAB INTERNATIONAL | United States | |
| | TBM | Taban Air Lines | TABAN AIR | Iran | |
| | THO | TACA De Honduras | LEMPIRA | Honduras | |
| VR | TCV | TACV | CABOVERDE | Cape Verde | |
| | TDC | Tadair | TADAIR | Spain | Ceased operation in 2003 |
| | TES | Taespejo Portugal LDA | Tesaban | Portugal | |
| | HET | TAF Helicopters | HELITAF | Spain | |
| | TSD | TAF-Linhas Aéreas | TAFI | Brazil | |
| | SBT | Taftan Airlines | TAFTAN | Iran | |
| | FPG | TAG Aviation | TAG AVIATION | Switzerland | |
| | TGM | TAG Aviation Espana | TAG ESPANA | Spain | |
| | VIP | Tag Aviation UK | SOVEREIGN | United Kingdom | |
| | TAG | TAG Aviation USA | TAG U-S | United States | |
| | FBO | TAG Farnborough Airport | | United Kingdom | |
| TI | TWI | Tailwind Airlines | TAILWIND | Turkey | |
| | TIN | Taino Tours | TAINO | Dominican Republic | |
| | TFB | Tair Airways | ROYAL TEE-AIR | Philippines | |
| | TJK | Tajikair | TAJIKAIR | Tajikistan | |
| | TZK | Tajikistan International Airlines | TAJIKISTAN | Tajikistan | |
| | TKE | Take Air Line | ISLAND BIRD | France | |
| | JEL | Tal Air Charters | JETEL | Canada | |
| | TAL | Talair | TALAIR | Papua New Guinea | |
| | TFF | Talon Air | TALON FLIGHT | United States | |
| PZ | LAP | TAM Mercosur | PARAGUAYA | Paraguay | |
| EQ | TAE | TAME | TAME | Ecuador | Transporte Aéreos Militares Ecuatorianos |
| | TMI | Tamir Airways | TAMIRWAYS | Israel | |
| QT | TPA | TAMPA | TAMPA | Colombia | |
| | TNR | Tanana Air Services | TAN AIR | United States | |
| TQ | TDM | Tandem Aero | TANDEM | Moldova | |
| | HTO | Tango Bravo | HELI TANGO | France | |
| TP | TAP | TAP Portugal | AIR PORTUGAL | Portugal | |
| | UTM | TAPC Aviatrans Aircompany | AVIATAPS | Uzbekistan | |
| | TPS | TAPSA Transportes Aéreos Petroleros | TAPSA | Argentina | |
| K3 | TQN | Taquan Air Services | TAQUAN | United States | |
| | THC | Tar Heel Aviation | TARHEEL | United States | |
| | TPL | TAR Interpilot | INTERPILOT | Mauritania | |
| | IRR | Tara Air Line | TARAIR | Iran | |
| | TTH | Tarhan Tower Airlines | | Turkey | |
| RO | ROT | Tarom | TAROM | Romania | |
| | RMS | Tas Aviation | TASS AIR | United States | |
| | CTP | Tashkent Aircraft Production Corporation | CORTAS | Uzbekistan | |
| HJ | TMN | Tasman Cargo Airlines | TASMAN | Australia | |
| SF | DTH | Tassili Airlines | TASSILI AIR | Algeria | |
| | PGS | Tauranga Aer Club | | New Zealand | |
| T6 | TVR | Tavrey Airlines | TAVREY | Ukraine | |
| | TQE | Taxair Mexiqienses | TAXAIR | Mexico | |
| | TXL | Taxi Aéreo Cozatl | TAXI COZATL | Mexico | |
| | TXM | Taxi Aéreo de México | TAXIMEX | Mexico | |
| | TUO | Taxi Aéreo Turístico | TURISTICO | Mexico | |
| | XNR | Taxi Aero Del Norte | TAXI NORTE | Mexico | |
| | TDV | Taxi Aero Nacional Del Evora | TAXI EVORA | Mexico | |
| | TRF | Taxi Air Fret | TAXI JET | France | |
| | VRC | Taxi de Veracruz | VERACRUZ | Mexico | |
| | TXR | Taxirey | TAXIREY | Mexico | |
| | TPR | Taxis Aéreos De Parral | TAXIS PARRAL | Mexico | |
| | TXO | Taxis Aéreos de Sinaloa | TAXIS SINALOA | Mexico | |
| | TNE | Taxis Aéreos del Noroeste | TAXINOROESTE | Mexico | |
| | TPF | Taxis Aéreos del Pacífico | TAXIPACIFICO | Mexico | |
| | TMH | Taxis Turisticos Marakame | TAXIMARAKAME | Mexico | |
| | TYF | Tayflite | TAYFLITE | United Kingdom | |
| | TFY | Tayside Aviation | TAYSIDE | United Kingdom | |
| L6 | VNZ | Tbilaviamsheni | TBILAVIA | Georgia | |
| | RRY | Tbilisi Aviation University | AIRFERRY | Georgia | |
| | TCD | Tchad Airlines | TCHADLINES | Chad | |
| | TIM | TEAM Linhas Aéreas | TEAM BRASIL | Brazil | |
| L9 | TLW | Teamline Air | Teamline | Austria | |
| | TEM | Tech-Mont Helicopter Company | TECHMONT | Slovakia | |
| | TEF | Tecnicas Fotograficas | TECFOTO | Spain | |
| | TBN | Teebah Airlines | TEEBAH | Sierra Leone | |
| | THR | Tehran Airline | TEHRAN AIR | Iran | |
| U8 | CYF | Tel Aviv Air | TUS AIR | Germany | defunct |
| | TCM | Teledyne Continental Motors | TELEDYNE | United States | |
| | TLX | Telesis Transair | TELESIS | United States | |
| | TEL | Telford Aviation | TELFORD | United States | |
| | TDE | Tellavia / Flight One | TELLURIDE | United States | |
| | DOT | Telnic Limited | DOT TEL | United Kingdom | |
| | TEH | Tempelhof Airways | TEMPELHOF | United States | |
| | TMS | Temsco Helicopters | TEMSCO | United States | |
| | TNL | Tengeriyn Ulaach Shine | SKY HORSE | Mongolia | |
| | TEB | Tenir Airlines | TENIR AIR | Kyrgyzstan | |
| | TNG | Tennessee Air National Guard 164th Airlift Group | | United States | |
| | TEN | Tennessee Airways | TENNESSEE | United States | |
| | TET | Tepavia-Trans Airlines | TEPAVIA | Moldova | |
| | TER | Territorial Airlines | TERRI-AIRE | United States | |
| | TIS | Tesis | TESIS | Russia | |
| | TXZ | Tex Star Air Freight | TEX STAR | United States | |
| | TXA | Texair Charter | OKAY AIR | United States | |
| | TXT | Texas Air Charters | TEXAS CHARTER | United States | Group One |
| | TXS | Texas Airlines | TEXAIR | United States | |
| | CWT | Texas Airways | TEXAS AIRWAYS | United States | |
| | TXN | Texas National Airlines | TEXAS NATIONAL | United States | |
| K9 | TEZ | TezJet | Tezjet | Kyrgyzstan | Started in 2014 |
| | TGC | TG Aviation | THANET | United Kingdom | |
| T2 | TCG | Thai Air Cargo | THAI CARGO | Thailand | |
| FD | AIQ | Thai AirAsia | THAI ASIA | Thailand | |
| XJ | TAX | Thai AirAsia X | EXPRESS WING | Thailand | |
| TG | THA | Thai Airways International | THAI | Thailand | |
| | TSL | Thai Aviation Services | THAI AVIATION | Thailand | |
| TXZ | | Thai Express Air | EXPRESS AIR | Thailand | |
| | TFH | Thai Flying Helicopter Service | THAI HELICOPTER | Thailand | |
| | TFT | Thai Flying Service | THAI FLYING | Thailand | |
| | THG | Thai Global Airline | THAI GLOBAL | Thailand | |
| | THJ | Thai Jet Intergroup | THAI JET | Thailand | |
| SL | TLM | Thai Lion Mentari | MENTARI | Thailand | |
| | TPV | Thai Pacific Airlines Business | THAI PACIFIC | Thailand | |
| 9I | LLR | Thai Sky Airlines | THAI SKY AIR | Thailand | |
| WE | THD | Thai Smile Airways | THAI SMILE | Thailand | |
| T9 | TSX | Thai Star Airlines | THAI STAR | Thailand | |
| VZ | TVJ | Thai Vietjet Air | THAIVIET JET | Thailand | |
| 2H | | Thalys | | Belgium | Not an airline (train). Used for codesharing |
| | GFN | The 955 Preservation Group | GRIFFON | United Kingdom | |
| | LEG | The Army Aviation Heritage Foundation | LEGACY | United States | |
| | LCC | The Lancair Company | LANCAIR | United States | |
| HQ | TCW | Thomas Cook Airlines | KESTREL | Belgium | Defunct |
| MT | TCX | Thomas Cook Airlines | KESTREL | United Kingdom | |
| | IHS | Thryluthjonustan | | Iceland | |
| | THU | Thunder Airlines | AIR THUNDER | Canada | |
| | TBD | Thunderbird Tours | ORCA | Canada | |
| | BLI | Thyssen Krupp AG | BLUELINE | Germany | |
| GS | GCR | Tianjin Airlines | BO HAI | China | |
| 3P | TNM | Tiara Air | TIARA | Aruba | |
| | TBA | Tibet Airlines | TIBET | China | |
| | TIK | Tic Air | TICAIR | Australia | |
| | TJN | Tien-Shan | NERON | Kazakhstan | |
| TT | TGG | Tigerair Australia | TIGGOZ | Australia | Previously TGW, callsign GO CAT |
| | MDL | Tigerair Mandala | MANDALA | Indonesia | defunct, original airline code RI |
| TR | TGW | Tigerair Singapore | GO CAT | Singapore | Merged with Scoot |
| IT | TTW | Tigerair Taiwan | SMART CAT | Taiwan | |
| | MOH | Tigerfly | MOTH | United Kingdom | |
| | TKC | Tikal Jets Airlines | TIKAL | Guatemala | |
| | TMR | Timberline Air | TIMBER | Canada | |
| | TIE | Time Air | TIME AIR | Czech Republic | |
| | BOX | Tiphook PLC | BOX | United Kingdom | defunct |
| | TVI | Tiramavia | TIRAMAVIA | Moldova | |
| ZT | AWC | Titan Airways | ZAP | United Kingdom | |
| | TYJ | TJS Malta Ltd. | TYROLMALTA | Malta | |
| | TSR | TJS San Marino S.r.L. | SAN MARINO | San Marino | |
| | TLS | TLC Air | TEALSY | United States | |
| | TMM | TMC Airlines | WILLOW RUN | United States | |
| 3V | TAY | TNT Airways | QUALITY | Belgium | |
| | NTR | TNT International Aviation | NITRO | United Kingdom | |
| | TBX | Tobago Express | TABEX | Trinidad and Tobago | |
| 7T | TOB | Tobruk Air | TOBRUK AIR | Libya | |
| | TOJ | TOJ Airlines | TOJ AIRLINE | Tajikistan | |
| TI | TOL | Tol-Air Services | TOL AIR | United States | |
| | TMK | Tomahawk Airways | TOMAHAWK | United States | |
| | TOP | Top Air | AIR TOP | Indonesia | |
| | CHE | Top Flight Air Service | CHECK AIR | United States | |
| | TLY | Top Fly | TOPFLY | Spain | |
| | LKW | Top Sky International | TOPINTER | Indonesia | |
| | TPD | Top Speed | TOP SPEED | Austria | |
| | TTL | Total Linhas Aéreas | TOTAL | Brazil | |
| | TOT | Totavia | | Canada | Aviation Information Services |
| | THE | Toumai Air Tchad | TOUMAI AIR | Chad | |
| | THF | Touraine Helicoptere | TOURAINE HELICO | France | |
| | TOW | Tower Air | TEE AIR | United States | Ceased operations |
| | TOY | Toyota Canada | TOYOTA | Canada | |
| | TGE | Trabajos Aéreos | TASA | Spain | |
| | AIM | Trabajos Aéreos Murcianos | PIJO | Spain | |
| | TVH | Trabajos Aéreos Vascongados | TRAVASA | Spain | |
| | TDR | Trade Air | TRADEAIR | Croatia | |
| TJ | GPD | Tradewind Aviation | GOODSPEED | United States | |
| | TDX | Tradewinds Airlines | TRADEWINDS EXPRESS | United States | Wrangler Aviation |
| | TWL | Tradewinds Aviation | TRADEWINDS CANADA | Canada | |
| | JCH | Trading Air Cargo | TRADING CARGO | Mauritania | |
| | TDO | TRADO | TRADO | Dominican Republic | Transporte Aéreo Dominicano |
| | TRG | TRAGSA (Medios Aéreos) | | Spain | |
| | HBA | Trail Lake Flying Service | HARBOR AIR | United States | |
| | TMQ | TRAM | TRAM AIR | Mauritania | |
| | TMX | Tramon Air | TRAMON | South Africa | |
| | TRR | Tramson Limited | TRAMSON | Sudan | |
| | MUI | Trans Air | MAUI | United States | |
| | TRC | Trans Air Charter | TRACKER | United States | |
| | TWW | Trans Air Welwitchia | WELWITCHIA | Angola | |
| | TNB | Trans Air-Benin | TRANS-BENIN | Benin | |
| | RTM | Trans Am Compania | AERO TRANSAM | Ecuador | |
| | CLR | Trans America | CLINTON AIRWAYS | United States | |
| | TVA | Trans America Airlines | TRANS-AMERICA | United States | |
| | TPU | Trans American Airlines (Trans Am) | TRANS PERU | Peru | |
| | TRT | Trans Arabian Air Transport | TRANS ARABIAN | Sudan | |
| | SRT | Trans Asian Airlines | TRASER | Kazakhstan | |
| | TLL | Trans Atlantic Airlines | ATLANTIC LEONE | Sierra Leone | |
| | LTA | Trans Atlantis | LANTRA | Canada | |
| | TCC | Trans Continental Airlines | TRANSCAL | Sudan | |
| | TCN | Trans Continental Airlines | TRANSCON | United States | |
| | TRJ | Trans Euro Air | HIGH TIDE | United Kingdom | |
| | TGY | Trans Guyana Airways | TRANS GUYANA | Guyana | |
| | THZ | Trans Helicoptere Service | LYON HELIJET | France | |
| | TIA | Trans International Airlines | TRANS INTERNATIONAL | United States | |
| | BAP | Trans International Express Aviation | BIG APPLE | United States | |
| | TRD | Trans Island Air | TRANS ISLAND | Barbados | |
| | SWL | Trans Jet Airways | TRANSJET | Sweden | |
| TL | TMA | Trans Mediterranean Airlines | TANGO LIMA | Lebanon | |
| | TMT | Trans Midwest Airlines | TRANS MIDWEST | United States | |
| | TNW | Trans Nation Airways | TRANS-NATION | Ethiopia | |
| | TNT | Trans North Turbo Air | TRANS NORTH | Canada | |
| | REC | Trans Reco | TRANS-RECO | Mauritania | |
| | SBJ | Trans Sahara Air | TRANS SAHARA | Nigeria | |
| | TSM | Trans Sayegh Airport Services | | Lebanon | |
| AX | LOF | Trans States Airlines | WATERSKI | United States | |
| TW | TWA | Trans World Airlines | TWA | United States | |
| | RBD | Trans World Express | RED BIRD | United States | |
| UN | TSO | Transaero Airlines | TRANSOVIET | Russia | |
| | TNF | Transafricaine | TRANSFAS | Burkina Faso | |
| | TCG | Transafricaine Air Cargo | AFRICARGO | Burkina Faso | |
| | TFK | Transafrik International | | São Tomé and Príncipe | |
| | TSA | Transair France | AIRTRAF | France | |
| | TGX | Transair Gabon | TRANSGABON | Gabon | |
| | TNI | Transair International Linhas Aéreas | TRANSINTER | United States | |
| | TSN | Trans-Air Services | AIR TRANS | Nigeria | |
| | TSG | Trans-Air-Congo | TRANS-CONGO | Republic of the Congo | |
| | KTS | Transair-Gyraintiee | KOTAIR | Russia | |
| | GJB | Trans-Air-Link | SKY TRUCK | United States | |
| | TWM | Transairways | | Mozambique | |
| | UTT | Transarabian Transportation Services | ARABIAN TRANSPORT | Uganda | |
| GE | TNA | TransAsia Airways | | Taiwan | defunct |
| | AUC | Transaustralian Air Express | AUSCARGO | Australia | Defunct |
| | VEN | Transaven | TRANSAVEN AIRLINE | Venezuela | |
| TO | TVF | Transavia France | FRANCE SOLEIL | France | |
| HV | TRA | Transavia Holland | TRANSAVIA | Netherlands | |
| | KTB | Transaviabaltika | TRANSBALTIKA | Lithuania | |
| AL | TXC | TransAVIAexport Airlines | TRANSEXPORT | Belarus | |
| | FNV | Transaviaservice | TRANSAVIASERVICE | Georgia | |
| | TVO | Transavio | TRANS-BALLERIO | Italy | |
| TR | TBA | Transbrasil | TRANSBRASIL | Brazil | defunct |
| | TIW | Transcarga Intl Airways | TIACA | Venezuela | |
| | TCE | Trans-Colorado Airlines | TRANS-COLORADO | United States | |
| | TCH | Transcontinental Air | TRANS GULF | Bahrain | |
| | KRA | Transcontinental Airlines | REGATA | Kazakhstan | |
| | TCT | Transcontinental Sur | TRANS-CONT | Uruguay | |
| | TCP | Transcorp Airways | TRANSCORP | United Kingdom | |
| UE | TEP | Transeuropean Airlines | TRANSEURLINE | Russia | |
| | TFA | Trans-Florida Airlines | TRANS FLORIDA | United States | |
| | TCU | Transglobal Airways Corporation | TRANSGLOBAL | Philippines | |
| | TXE | Transilvania Express | TRANSAIR EXPRESS | Romania | |
| | KCA | Trans-Kiev | TRANS-KIEV | Ukraine | |
| | TLA | Translift Airways | TRANSLIFT | Ireland | |
| | TMD | Transmandu | TRANSMANDU | Venezuela | |
| | TMD | Transmed Airlines | | Egypt | |
| T9 | TRZ | TransMeridian Airlines | TRANS-MERIDIAN | United States | Defunct |
| TH | RMY | Raya Airways | TRANSMILE | Malaysia | |
| | TNV | Transnorthern | TRANSNORTHERN | United States | |
| | TPP | Transpac Express | TRANS EXPRESS | Australia | |
| | PCW | Trans-Pacific Orient Airways | PACIFIC ORIENT | Philippines | |
| | TPM | Transpaís Aéreo | TRANSPAIS | Mexico | |
| | TNP | Transped Aviation | TRANSPED | Austria | |
| | TRM | Transport Aerien de Mauritanie | SOTRANS | Mauritania | |
| | TLF | Transport Africa | TRANS-LEONE | Sierra Leone | |
| | TGO | Transport Canada | TRANSPORT | Canada | |
| | TFI | Transport Facilitators | | United States | |
| | TQR | Transportación Aérea De Querétaro | TRANSQUERETARO | Mexico | |
| | MCT | Transportación Aérea Del Mar De Cortés | TRANS CORTES | Mexico | |
| | TPN | Transportación Aérea del Norte | AEREA DELNORTE | Mexico | |
| | TTR | Transportaciones Y Servicios Aéreos | TRANSPORTACIONES | Mexico | |
| | TSI | Transport'air | TRANSPORTAIR | France | |
| | TCB | Transporte Aereo De Colombia | AERO COLOMBIA | Colombia | |
| | TAD | Transporte Aéreo Dominicano | TRANS DOMINICAN | Dominican Republic | |
| | TZE | Transporte Aéreo Ernesto Saenz | TRANSPORTE SAENZ | Mexico | |
| | TTS | Transporte Aéreo Técnico Ejecutivo | TECNICO | Mexico | |
| | MGM | Transporte Aero MGM | AERO EMM-GEE-EMM | Mexico | |
| | TMZ | Transporte Amazonair | TRANS AMAZON | Venezuela | |
| | TCB | Transporte del Caribe | TRANSCARIBE | Colombia | |
| | EAR | Transporte Ejecutivo Aéreo | EJECUTIVO-AEREO | Mexico | |
| | TPT | Transportes Aéreo del Sureste | TASSA | Mexico | |
| | MPO | Transportes Aéreos Amparo | AMPARO | Mexico | |
| | BOL | Transportes Aéreos Bolivianos | BOL | Bolivia | |
| | TDI | Transportes Aéreos de Ixtlán | TRANSIXTLAN | Mexico | |
| | TPX | Transportes Aéreos De Xalapa | TRANSXALAPA | Mexico | |
| | TMY | Transportes Aéreos del Mundo Maya | MUNDO MAYA | Mexico | |
| | TFO | Transportes Aéreos del Pacífico | TRANSPORTES PACIFICO | Mexico | |
| | DCL | Transportes Aéreos Don Carlos | DON CARLOS | Chile | |
| | ROU | Transportes Aéreos I. R. Crusoe | ROBINSON CRUSOE | Chile | |
| | TSP | Transportes Aéreos Inter | TRANSPO-INTER | Guatemala | |
| | MXQ | Transportes Aéreos Mexiquenses | MEXIQUENSES | Mexico | |
| TX | TAN | Transportes Aéreos Nacionales | | Honduras | Defunct |
| | ELV | Transportes Aéreos Nacionales De Selva Tans | AEREOS SELVA | Peru | |
| | TPG | Transportes Aéreos Pegaso | TRANSPEGASO | Mexico | |
| | TGI | Transportes Aéreos Regionales | TRANSPORTE REGIONAL | Mexico | |
| | SRF | Transportes Aéreos San Rafael | SAN RAFEAL | Chile | |
| | RRT | Transportes Aéreos Sierra | SIERRA ALTA | Mexico | |
| | SEI | Transportes Aéreos Sierra Madre | TRANSPORTE SIERRA | Mexico | |
| | TAU | Transportes Aéreos Tauro | TRANSTAURO | Mexico | |
| | TPZ | Transportes La Paz | TRANSPAZ | Mexico | |
| OF | TML | Transports et Travaux Aériens de Madagascar | TAM AIRLINE | Madagascar | |
| | TPY | Trans-Provincial Airlines | TRANS PROVINCIAL | Canada | |
| | TTC | Transteco | TRANSTECO | Angola | |
| | UTN | Trans-Ulgii | TRANS-ULGII | Mongolia | defunct |
| | TWE | Transwede Airways | TRANSWEDE | Sweden | |
| 9T | ABS | Transwest Air | ATHABASKA | Canada | |
| | TRW | Transwestern Airlines of Utah | TRANS-WEST | United States | |
| | TSW | Transwings | SWISSTRANS | Switzerland | |
| | TST | TRAST | TRAST | Kazakhstan | |
| S5 | TSJ | Trast Aero | TRAST AERO | Kyrgyzstan | |
| | TSK | Trast Aero | TOMSK-AVIA | Kyrgyzstan | |
| | TAX | Travel Air | TRAVELAIR | United States | |
| | TIC | Travel International Air Charters | TRAVEL INTERNATIONAL | Zambia | |
| | TMC | Travel Management Company | TRAIL BLAZER | United States | |
| | TLV | Travelair | PAJAROS | Uruguay | |
| 1E | | Travelsky Technology | | China | |
| | TDA | Trend Aviation | TREND AIR | United States | |
| | TNX | Trener Ltd | TRAINER | Hungary | |
| | TRU | Triangle Airline (Uganda) | TRI AIR | Uganda | |
| | SWD | Trifly | SAWBLADE | United States | |
| | TGN | Trigana Air Service | TRIGANA | Indonesia | |
| GY | TMG | Tri-MG Intra Asia Airlines | TRILINES | Indonesia | |
| | TBH | Trinity Air Bahamas | | Bahamas | |
| T4 | TIB | TRIP Linhas Aéreas | TRIP | Brazil | IATA code 8R changed to T4 (2010) |
| | CLU | Triple Alpha | CAROLUS | Germany | |
| | TTP | Triple O Aviation | MIGHTY WING | Nigeria | |
| | TSY | Tristar Air | TRIPLE STAR | Egypt | |
| | TRY | Tristar Airlines | TRISTAR AIR | United States | |
| | TSS | Tri-State Aero | TRI-STATE | United States | |
| | DRC | Triton Airlines | TRITON AIR | Canada | |
| | TSV | Tropair Airservices | TROPIC | United Kingdom | |
| PM | TOS | Tropic Air | TROPISER | Belize | |
| | TRO | Tropic Airlines-Air Molokai | MOLOKAI | United States | |
| M7 | TBG | Tropical Airways | | Haiti | |
| | TKX | Tropical International Airways | TROPEXPRESS | Saint Kitts and Nevis | |
| | TCA | Tropican Air Services | TROPICANA | Egypt | |
| | TYG | Trygg-Flyg | TRYGG | Sweden | |
| TZ | TDS | Tsaradia | TSARADIA | Madagascar | |
| | PSS | TSSKB-Progress | PROGRESS | Russia | |
| | TTA | TTA - Sociedade de Transporte e Trabalho Aéreo | KANIMANBO | Mozambique | |
| | TBR | Tubelair | TUBELAIR | Tunisia | |
| BY | TOM | TUI Airways | TOM JET | United Kingdom | Formerly "TOMSON" |
| TB | JAF | TUI fly Belgium | BEAUTY | Belgium | |
| X3 | TUI | TUI fly Deutschland | TUI JET | Germany | |
| OR | TFL | TUI fly Netherlands | ORANGE | Netherlands | |
| 6B | BLX | TUI fly Nordic | BLUESCAN | Sweden | |
| TD | TLP | Tulip Air | TULIPAIR | Netherlands | |
| | TUL | Tulpar Air | URSAL | Russia | |
| | TUX | Tulpar Air Service | TULPA | Kazakhstan | |
| | TUZ | Tuna Aero | TUNA | Sweden | |
| UG | TUX | Tuninter | | Tunisia | |
| TU | TAR | Tunisair | TUNAIR | Tunisia | |
| | TAJ | Tunisavia | TUNISAVIA | Tunisia | |
| 3T | URN | Turan Air | TURAN | Azerbaijan | |
| | TBC | Turbine Air Cargo UK | | United Kingdom | |
| | TAC | Turbot Air Cargo | TURBOT | Senegal | |
| | TRQ | Turdus Airways | HUNTER | Netherlands | Defunct, ICAO code in use by another airline |
| | TUC | Turismo Aéreo de Chile | TURICHILE | Chile | |
| | THK | Turk Hava Kurumu Hava Taksi Isletmesi | HUR KUS | Turkey | |
| | THS | Turkish Aerospace Industries | TUSAS | Turkey | |
| | HVK | Turkish Air Force | TURKISH AIRFORCE | Turkey | |
| TK | THY | Turkish Airlines | TURKISH | Turkey | |
| | TRK | Turkish Airlines General Aviation | TURKISH REPUBLIC | Turkey | |
| T5 | TUA | Turkmenistan Airlines | TURKMENISTAN | Turkmenistan | |
| | TLT | Turtle Airways | TURTLE | Fiji | |
| | USB | Tusheti | TUSHETI | Georgia | |
| TW | TWB | T'way Air | TWAYAIR | Republic of Korea | |
| | TWO | Twente Airlines | COLIBRI | Netherlands | |
| | TCY | Twin Cities Air Service | TWIN CITY | United States | |
| T7 | TJT | Twin Jet | TWINJET | France | |
| | TNY | Twin Town Leasing Company | TWINCAL | United States | |
| | TWJ | Twinjet Aircraft Sales | | United Kingdom | |
| | TYW | Tyrol Air Ambulance | TYROL AMBULANCE | Austria | |
| VO | TYR | Tyrolean Airways | TYROLEAN | Austria | Renamed from Austrian Arrows |
| | TJS | Tyrolean Jet Services | TYROLJET | Austria | |
| | TUM | Tyumenspecavia | TUMTEL | Russia | |
| VNX | TKK | flyADVANCED | TARKA | United States | Aero Ways Inc. flyADVANCED |