Airline codes| IATA | ICAO | Airline | Call sign | Country | Comments |
|---|
| TEZ | TezJet Airlines | Kyrgyzstan | Started in 2014 |
| TXZ | Thai Express Air | EXPRESS AIR | Thailand | 2014[1] |
| WE | THD | Thai Smile Airways | THAI SMILE | Thailand | 2014[1] |
| VZ | TVJ | Thai Vietjet Air | THAIVIET JET | Thailand | 2014[1] |
| TQE | Taxair Mexiqienses | TAXAIR | Mexico | Callsign changed from TAXA QUENSE in 2014[1] |
| XJ | TAX | Thai AirAsia X | EXPRESS WING | Thailand |
| SL | TLM | Thai Lion Mentari | MENTARI | Thailand |
| TCB | Transporte Aereo De Colombia | AERO COLOMBIA | Colombia |
| TDA | Trend Aviation | TREND AIR | United States |
| THS | Turkish Aerospace Industries | TUSAS | Turkey |
| TMD | Transmandu | TRANSMANDU | Venezuela |
| TRK | Turkish Airlines General Aviation | TURKISH REPUBLIC | Turkey |
| TKJ | Tarkim Aviation | TARKIM AVIATION | Turkey |
| TCG | Transafricaine Air Cargo | AFRICARGO | Burkina Faso |
| TMC | Travel Management Company | TRAIL BLAZER | United States |
| SWD | Trifly | SAWBLADE | United States |
| SWL | Trans Jet Airways | TRANSJET | Sweden |
| TAC | Turbot Air Cargo | TURBOT | Senegal |
| TAD | Transporte Aéreo Dominicano | TRANS DOMINICAN | Dominican Republic |
| EQ | TAE | TAME | TAME | Ecuador | Transporte Aéreos Militares Ecuatorianos |
| BAP | Trans International Express Aviation | BIG APPLE | United States |
| TAG | TAG Aviation USA | TAG U-S | United States |
| TAL | Talair | TALAIR | Papua New Guinea |
| JJ | TAM | LATAM Brasil | TAM | Brazil |
| AUC | Transaustralian Air Express | AUSCARGO | Australia | Defunct |
| TP | TAP | TAP Portugal | AIR PORTUGAL | Portugal |
| TU | TAR | Tunisair | TUNAIR | Tunisia |
| TAU | Transportes Aéreos Tauro | TRANSTAURO | Mexico |
| TAX | Travel Air | TRAVELAIR | United States |
| 3V | TAY | TNT Airways | QUALITY | Belgium |
| TR | TBA | Transbrasil | TRANSBRASIL | Brazil | defunct |
| TBC | Turbine Air Cargo UK | United Kingdom |
| TBD | Thunderbird Tours | ORCA | Canada |
| M7 | TBG | Tropical Airways | Haiti |
| TBH | Trinity Air Bahamas | Bahamas |
| TBI | TAB Express International | TAB INTERNATIONAL | United States |
| TBM | Taban Air Lines | TABAN AIR | Iran |
| TBN | Teebah Airlines | TEEBAH | Sierra Leone |
| TBR | Tubelair | TUBELAIR | Tunisia |
| TBX | Tobago Express | TABEX | Trinidad and Tobago |
| TCA | Tropican Air Services | TROPICANA | Egypt |
| TCB | Transporte del Caribe | TRANSCARIBE | Colombia |
| TCC | Trans Continental Airlines | TRANSCAL | Sudan |
| TCD | Tchad Airlines | TCHADLINES | Chad |
| TCE | Trans-Colorado Airlines | TRANS-COLORADO | United States |
| T2 | TCG | Thai Air Cargo | THAI CARGO | Thailand |
| TCH | Transcontinental Air | TRANS GULF | Bahrain |
| TCM | Teledyne Continental Motors | TELEDYNE | United States |
| TCN | Trans Continental Airlines | TRANSCON | United States |
| TCP | Transcorp Airways | TRANSCORP | United Kingdom |
| TCT | Transcontinental Sur | TRANS-CONT | Uruguay |
| TCU | Transglobal Airways Corporation | TRANSGLOBAL | Philippines |
| HQ | TCW | Thomas Cook Airlines | THOMAS COOK | Belgium Defunct |
| MT | TCX | Thomas Cook Airlines | THOMAS COOK | United Kingdom | Formerly "KESTREL” |
| TCY | Twin Cities Air Service | TWIN CITY | United States |
| TDC | Tadair | TADAIR | Spain | Ceased operation in 2003 |
| TDE | Tellavia / Flight One | TELLURIDE | United States |
| TDI | Transportes Aéreos de Ixtlán | TRANSIXTLAN | Mexico |
| TQ | TDM | Tandem Aero | TANDEM | Moldova |
| TDO | TRADO | TRADO | Dominican Republic | Transporte Aéreo Dominicano |
| TDR | Trade Air | TRADEAIR | Croatia |
| TDV | Taxi Aero Nacional Del Evora | TAXI EVORA | Mexico |
| TDX | Tradewinds Airlines | TRADEWINDS EXPRESS | United States | Wrangler Aviation |
| TEB | Tenir Airlines | TENIR AIR | Kyrgyzstan |
| L9 | TLW | Teamline Air | Teamline | Austria |
| TEF | Tecnicas Fotograficas | TECFOTO | Spain |
| TEH | Tempelhof Airways | TEMPELHOF | United States |
| TEL | Telford Aviation | TELFORD | United States |
| TEM | Tech-Mont Helicopter Company | TECHMONT | Slovakia |
| TEN | Tennessee Airways | TENNESSEE | United States |
| TER | Territorial Airlines | TERRI-AIRE | United States |
| TES | Taespejo Portugal LDA | Tesaban | Portugal |
| UE | TEP | Transeuropean Airlines | TRANSEURLINE | Russia |
| TET | Tepavia-Trans Airlines | TEPAVIA | Moldova |
| TFA | Trans-Florida Airlines | TRANS FLORIDA | United States |
| TFB | Tair Airways | ROYAL TEE-AIR | Philippines |
| TFF | Talon Air | TALON FLIGHT | United States |
| AIM | Trabajos Aéreos Murcianos | PIJO | Spain |
| TFH | Thai Flying Helicopter Service | THAI HELICOPTER | Thailand |
| TFI | Transport Facilitators | United States |
| TFK | Transafrik International | São Tomé and Príncipe |
| TFO | Transportes Aéreos del Pacífico | TRANSPORTES PACIFICO | Mexico |
| TFT | Thai Flying Service | THAI FLYING | Thailand |
| SRF | Transportes Aéreos San Rafael | SAN RAFEAL | Chile |
| TFY | Tayside Aviation | TAYSIDE | United Kingdom |
| TGC | TG Aviation | THANET | United Kingdom |
| TGE | Trabajos Aéreos | TASA | Spain |
| TGI | Transportes Aéreos Regionales | TRANSPORTE REGIONAL | Mexico |
| TGM | TAG Aviation Espana | TAG ESPANA | Spain |
| TGN | Trigana Air Service | TRIGANA | Indonesia |
| 2S | TGR | Satgur Air Transport | SATGURAIR | Liberia | defunct |
| ZT | AWC | Titan Airways | ZAP | United Kingdom |
| TGO | Transport Canada | TRANSPORT | Canada |
| TR | TGW | Tigerair Singapore | GO CAT | Singapore | Merged with Scoot |
| TT | TGG | Tigerair Australia | TIGGOZ | Australia | Previously TGW, callsign GO CAT |
| IT | TTW | Tigerair Taiwan | SMART CAT | Taiwan |
| MDL | Tigerair Mandala | MANDALA | Indonesia | defunct, original airline code RI |
| DG | SRQ | Cebgo | BLUE JAY | Philippines | Formerly SEAir, South East Asian Airlines and Tigerair Philippines |
| TGX | Transair Gabon | TRANSGABON | Gabon |
| TGY | Trans Guyana Airways | TRANS GUYANA | Guyana |
| TG | THA | Thai Airways International | THAI | Thailand |
| THC | Tar Heel Aviation | TARHEEL | United States |
| THE | Toumai Air Tchad | TOUMAI AIR | Chad |
| THF | Touraine Helicoptere | TOURAINE HELICO | France |
| THG | Thai Global Airline | THAI GLOBAL | Thailand |
| THJ | Thai Jet Intergroup | THAI JET | Thailand |
| THK | Turk Hava Kurumu Hava Taksi Isletmesi | HUR KUS | Turkey |
| FD | AIQ | Thai AirAsia | THAI ASIA | Thailand |
| THO | TACA De Honduras | LEMPIRA | Honduras |
| THR | Tehran Airline | TEHRAN AIR | Iran |
| THU | Thunder Airlines | AIR THUNDER | Canada |
| TK | THY | Turkish Airlines | TURKISH | Turkey |
| THZ | Trans Helicoptere Service | LYON HELIJET | France |
| TIA | Trans International Airlines | TRANS INTERNATIONAL | United States |
| TIC | Travel International Air Charters | TRAVEL INTERNATIONAL | Zambia |
| TIE | Time Air | TIME AIR | Czech Republic |
| TIK | Tic Air | TICAIR | Australia |
| TIM | TEAM Linhas Aéreas | TEAM BRASIL | Brazil |
| TIN | Taino Tours | TAINO | Dominican Republic |
| TIS | Tesis | TESIS | Russia |
| TIW | Transcarga Intl Airways | TIACA | Venezuela |
| TJK | Tajikair | TAJIKAIR | Tajikistan |
| TJN | Tien-Shan | NERON | Kazakhstan |
| TJS | Tyrolean Jet Services | TYROLJET | Austria |
| T7 | TJT | Twin Jet | TWINJET | France |
| TKC | Tikal Jets Airlines | TIKAL | Guatemala |
| TKE | Take Air Line | ISLAND BIRD | France |
| TKX | Tropical International Airways | TROPEXPRESS | Saint Kitts and Nevis |
| 9I | LLR | Thai Sky Airlines | THAI SKY AIR | Thailand |
| TLA | Translift Airways | TRANSLIFT | Ireland |
| TLF | Transport Africa | TRANS-LEONE | Sierra Leone |
| TLL | Trans Atlantic Airlines | ATLANTIC LEONE | Sierra Leone |
| TLO | Eagle Canyon Airlines | TALON AIR | United States |
| TD | TLP | Tulip Air | TULIPAIR | Netherlands |
| TAJ | Tunisavia | TUNISAVIA | Tunisia |
| TLS | TLC Air | TEALSY | United States |
| TLT | Turtle Airways | TURTLE | Fiji |
| TLV | Travelair | PAJAROS | Uruguay |
| TLX | Telesis Transair | TELESIS | United States |
| TLY | Top Fly | TOPFLY | Spain |
| TL | TMA | Trans Mediterranean Airlines | TANGO LIMA | Lebanon |
| TMD | Transmed Airlines | Egypt |
| GY | TMG | Tri-MG Intra Asia Airlines | TRILINES | Indonesia |
| TMH | Taxis Turisticos Marakame | TAXIMARAKAME | Mexico |
| TMI | Tamir Airways | TAMIRWAYS | Israel |
| TMK | Tomahawk Airways | TOMAHAWK | United States |
| OF | TML | Transports et Travaux Aériens de Madagascar | TAM AIRLINE | Madagascar |
| TMM | TMC Airlines | WILLOW RUN | United States |
| TMQ | TRAM | TRAM AIR | Mauritania |
| TMR | Timberline Air | TIMBER | Canada |
| TMS | Temsco Helicopters | TEMSCO | United States |
| TMT | Trans Midwest Airlines | TRANS MIDWEST | United States |
| TMX | Tramon Air | TRAMON | South Africa |
| TMY | Transportes Aéreos del Mundo Maya | MUNDO MAYA | Mexico |
| TMZ | Transporte Amazonair | TRANS AMAZON | Venezuela |
| TNB | Trans Air-Benin | TRANS-BENIN | Benin |
| TNE | Taxis Aéreos del Noroeste | TAXINOROESTE | Mexico |
| TNF | Transafricaine | TRANSFAS | Burkina Faso |
| TNG | Tennessee Air National Guard 164th Airlift Group | United States |
| TNI | Transair International Linhas Aéreas | TRANSINTER | United States |
| TNL | Tengeriyn Ulaach Shine | SKY HORSE | Mongolia |
| 3P | TNM | Tiara Air | TIARA | Aruba |
| TNP | Transped Aviation | TRANSPED | Austria |
| TNR | Tanana Air Services | TAN AIR | United States |
| TNT | Trans North Turbo Air | TRANS NORTH | Canada |
| TNV | Transnorthern | TRANSNORTHERN | United States |
| TNW | Trans Nation Airways | TRANS-NATION | Ethiopia |
| TNX | Trener Ltd | TRAINER | Hungary |
| TNY | Twin Town Leasing Company | TWINCAL | United States |
| 7T | TOB | Tobruk Air | TOBRUK AIR | Libya |
| TOJ | TOJ Airlines | TOJ AIRLINE | Tajikistan |
| TI | TOL | Tol-Air Services | TOL AIR | United States |
| BY | TOM | Thomson Airways | TUI AIR[2] | United Kingdom | Formerly "TOMSON" |
| TOP | Top Air | AIR TOP | Indonesia |
| TOR | Toronto Airways | TORONTAIR | Canada |
| PM | TOS | Tropic Air | TROPISER | Belize |
| TOT | Totavia | Canada | Aviation Information Services |
| TOW | Tower Air | TEE AIR | United States |
| TOY | Toyota Canada | TOYOTA | Canada |
| QT | TPA | TAMPA | TAMPA | Colombia |
| TPD | Top Speed | TOP SPEED | Austria |
| TPF | Taxis Aéreos del Pacífico | TAXIPACIFICO | Mexico |
| TPG | Transportes Aéreos Pegaso | TRANSPEGASO | Mexico |
| TPL | TAR Interpilot | INTERPILOT | Mauritania |
| TPM | Transpaís Aéreo | TRANSPAIS | Mexico |
| TPN | Transportación Aérea del Norte | AEREA DELNORTE | Mexico |
| TPP | Transpac Express | TRANS EXPRESS | Australia |
| TPR | Taxis Aéreos De Parral | TAXIS PARRAL | Mexico |
| TPS | TAPSA Transportes Aéreos Petroleros | TAPSA | Argentina |
| TPT | Transportes Aéreo del Sureste | TASSA | Mexico |
| TPU | Trans American Airlines (Trans Am) | TRANS PERU | Peru |
| TPV | Thai Pacific Airlines Business | THAI PACIFIC | Thailand |
| TPX | Transportes Aéreos De Xalapa | TRANSXALAPA | Mexico |
| TPY | Trans-Provincial Airlines | TRANS PROVINCIAL | Canada |
| TPZ | Transportes La Paz | TRANSPAZ | Mexico |
| K3 | TQN | Taquan Air Services | TAQUAN | United States |
| TQR | Transportación Aérea De Querétaro | TRANSQUERETARO | Mexico |
| GE | TNA | TransAsia Airways | Taiwan | defunct |
| TO | TVF | Transavia France | FRANCE SOLEIL | France |
| HV | TRA | Transavia Holland | TRANSAVIA | Netherlands |
| TRC | Trans Air Charter | TRACKER | United States |
| VR | TCV | TACV | CABOVERDE | Cape Verde |
| TRD | Trans Island Air | TRANS ISLAND | Barbados |
| TRF | Taxi Air Fret | TAXI JET | France |
| TRG | TRAGSA (Medios Aéreos) | Spain |
| TRJ | Trans Euro Air | HIGH TIDE | United Kingdom |
| TRM | Transport Aerien de Mauritanie | SOTRANS | Mauritania |
| TRO | Tropic Airlines-Air Molokai | MOLOKAI | United States |
| TRQ | Turdus Airways | HUNTER | Netherlands | Defunct, ICAO code in use by another airline |
| TRR | Tramson Limited | TRAMSON | Sudan |
| TRT | Trans Arabian Air Transport | TRANS ARABIAN | Sudan |
| TRU | Triangle Airline (Uganda) | TRI AIR | Uganda |
| TRW | Transwestern Airlines of Utah | TRANS-WEST | United States |
| TRY | Tristar Airlines | TRISTAR AIR | United States |
| T9 | TRZ | TransMeridian Airlines | TRANS-MERIDIAN | United States | Defunct |
| TSA | Transair France | AIRTRAF | France |
| TSD | TAF-Linhas Aéreas | TAFI | Brazil |
| TH | TSE | Transmile Air Services | TRANSMILE | Malaysia |
| TSG | Trans-Air-Congo | TRANS-CONGO | Republic of the Congo |
| TSI | Transport'air | TRANSPORTAIR | France |
| S5 | TSJ | Trast Aero | TRAST AERO | Kyrgyzstan |
| TSK | Trast Aero | TOMSK-AVIA | Kyrgyzstan |
| TSL | Thai Aviation Services | THAI AVIATION | Thailand |
| SBT | Taftan Airlines | TAFTAN | Iran |
| 9T | ABS | Transwest Air | ATHABASKA | Canada |
| TSM | Trans Sayegh Airport Services | Lebanon |
| TSN | Trans-Air Services | AIR TRANS | Nigeria |
| UN | TSO | Transaero Airlines | TRANSOVIET | Russia |
| TSP | Transportes Aéreos Inter | TRANSPO-INTER | Guatemala |
| TSR | Trans Service Airlift | TRANS SERVICE | Democratic Republic of Congo |
| TSS | Tri-State Aero | TRI-STATE | United States |
| TST | TRAST | TRAST | Kazakhstan |
| TSV | Tropair Airservices | TROPIC | United Kingdom |
| TSW | Transwings | SWISSTRANS | Switzerland |
| T9 | TSX | Thai Star Airlines | THAI STAR | Thailand |
| TSY | Tristar Air | TRIPLE STAR | Egypt |
| TTA | TTA - Sociedade de Transporte e Trabalho Aéreo | KANIMANBO | Mozambique |
| TTC | Transteco | TRANSTECO | Angola |
| TTH | Tarhan Tower Airlines | Turkey |
| TTL | Total Linhas Aéreas | TOTAL | Brazil |
| TTP | Triple O Aviation | MIGHTY WING | Nigeria |
| TTR | Transportaciones Y Servicios Aéreos | TRANSPORTACIONES | Mexico |
| TTS | Transporte Aéreo Técnico Ejecutivo | TECNICO | Mexico |
| T5 | TUA | Turkmenhovayollary | TURKMENISTAN | Turkmenistan |
| TUC | Turismo Aéreo de Chile | TURICHILE | Chile |
| UG | TUI | Tuninter | Tunisia |
| TUL | Tulpar Air | URSAL | Russia |
| TUM | Tyumenspecavia | TUMTEL | Russia |
| TUO | Taxi Aéreo Turístico | TURISTICO | Mexico |
| TUX | Tulpar Air Service | TULPA | Kazakhstan |
| TUZ | Tuna Aero | TUNA | Sweden |
| TVA | Trans America Airlines | TRANS-AMERICA | United States |
| TVH | Trabajos Aéreos Vascongados | TRAVASA | Spain |
| TVI | Tiramavia | TIRAMAVIA | Moldova |
| 7O[3] | TVL | Travel Service | TRAVEL SERVICE | Hungary |
| TVO | Transavio | TRANS-BALLERIO | Italy |
| T6 | TVR | Tavrey Airlines | TAVREY | Ukraine |
| QS | TVS | Travel Service | SKYTRAVEL | Czech Republic |
| TW | TWB | T'way Air | TWAYAIR | Republic of Korea |
| TWE | Transwede Airways | TRANSWEDE | Sweden |
| TWJ | Twinjet Aircraft Sales | United Kingdom |
| TWL | Tradewinds Aviation | TRADEWINDS CANADA | Canada |
| TWM | Transairways | Mozambique |
| TWO | Twente Airlines | COLIBRI | Netherlands |
| TWW | Trans Air Welwitchia | WELWITCHIA | Angola |
| TXA | Texair Charter | OKAY AIR | United States |
| AL | TXC | TransAVIAexport Airlines | TRANSEXPORT | Belarus |
| TXE | Transilvania Express | TRANSAIR EXPRESS | Romania |
| TXL | Taxi Aéreo Cozatl | TAXI COZATL | Mexico |
| TXM | Taxi Aéreo de México | TAXIMEX | Mexico |
| TXN | Texas National Airlines | TEXAS NATIONAL | United States |
| TXO | Taxis Aéreos de Sinaloa | TAXIS SINALOA | Mexico |
| TXR | Taxirey | TAXIREY | Mexico |
| TXS | Texas Airlines | TEXAIR | United States |
| TXT | Texas Air Charters | TEXAS CHARTER | United States | Group One |
| TXZ | Tex Star Air Freight | TEX STAR | United States |
| TYF | Tayflite | TAYFLITE | United Kingdom |
| TYG | Trygg-Flyg | TRYGG | Sweden |
| TYW | Tyrol Air Ambulance | TYROL AMBULANCE | Austria |
| TZE | Transporte Aéreo Ernesto Saenz | TRANSPORTE SAENZ | Mexico |
| TZK | Tajikistan International Airlines | TAJIKSTAN | Tajikistan |
| BLI | Thyssen Krupp AG | BLUELINE | Germany |
| 6B | BLX | TUIfly Nordic | BLUESCAN | Sweden |
| BOL | Transportes Aéreos Bolivianos | BOL | Bolivia |
| BOX | Tiphook PLC | BOX | United Kingdom | defunct |
| CHE | Top Flight Air Service | CHECK AIR | United States |
| CLR | Trans America | CLINTON AIRWAYS | United States |
| CLU | Triple Alpha | CAROLUS | Germany |
| CTP | Tashkent Aircraft Production Corporation | CORTAS | Uzbekistan |
| CWT | Texas Airways | TEXAS AIRWAYS | United States |
| DCL | Transportes Aéreos Don Carlos | DON CARLOS | Chile |
| DOT | Telnic Limited | DOT TEL | United Kingdom |
| DRC | Triton Airlines | TRITON AIR | Canada |
| DT | DTA | TAAG Angola Airlines | DTA | Angola |
| SF | DTH | Tassili Airlines | TASSILI AIR | Algeria |
| EAR | Transporte Ejecutivo Aéreo | EJECUTIVO-AEREO | Mexico |
| ELV | Transportes Aéreos Nacionales De Selva Tans | AEREOS SELVA | Peru |
| FBO | TAG Farnborough Airport | United Kingdom |
| FNV | Transaviaservice | TRANSAVIASERVICE | Georgia |
| FPG | TAG Aviation | TAG AVIATION | Switzerland |
| GFN | The 955 Preservation Group | GRIFFON | United Kingdom |
| GJB | Trans-Air-Link | SKY TRUCK | United States |
| TJ | GPD | Tradewind Aviation | GOODSPEED | United States |
| HBA | Trail Lake Flying Service | HARBOR AIR | United States |
| HET | TAF Helicopters | HELITAF | Spain |
| HTO | Tango Bravo | HELI TANGO | France |
| HVK | Turkish Air Force | TURKISH AIRFORCE | Turkey |
| IHS | Thryluthjonustan | Iceland |
| TBA | Tibet Airlines | TIBET | China |
| IRF | TA-Air Airline | TA-AIR | Iran |
| IRR | Tara Air Line | TARAIR | Iran |
| JCH | Trading Air Cargo | TRADING CARGO | Mauritania |
| KCA | Trans-Kiev | TRANS-KIEV | Ukraine |
| JEL | Tal Air Charters | JETEL | Canada |
| KRA | Transcontinental Airlines | REGATA | Kazakhstan |
| KTB | Transaviabaltika | TRANSBALTIKA | Lithuania |
| KTS | Transair-Gyraintiee | KOTAIR | Russia |
| PZ | LAP | TAM Mercosur | PARAGUAYA | Paraguay |
| LCC | The Lancair Company | LANCAIR | United States |
| LEG | The Army Aviation Heritage Foundation | LEGACY | United States |
| LKW | Top Sky International | TOPINTER | Indonesia |
| AX | LOF | Trans States Airlines | WATERSKI | United States |
| LTA | Trans Atlantis | LANTRA | Canada |
| MCT | Transportación Aérea Del Mar De Cortés | TRANS CORTES | Mexico |
| MGM | Transporte Aero MGM | AERO EMM-GEE-EMM | Mexico |
| MOH | Tigerfly | MOTH | United Kingdom |
| MPO | Transportes Aéreos Amparo | AMPARO | Mexico |
| MUI | Trans Air | MAUI | United States |
| MXQ | Transportes Aéreos Mexiquenses | MEXIQUENSES | Mexico |
| 1E | Travelsky Technology | China |
| 2H | Thalys | Belgium | Not an airline (train).
Used for codesharing |
| NTR | TNT International Aviation | NITRO | United Kingdom |
| 1L | OSY | Open Skies Consultative Commission | OPEN SKIES | United States |
| PCW | Trans-Pacific Orient Airways | PACIFIC ORIENT | Philippines |
| PGS | Tauranga Aer Club | New Zealand |
| PSS | TSSKB-Progress | PROGRESS | Russia |
| RBD | Trans World Express | RED BIRD | United States |
| REC | Trans Reco | TRANS-RECO | Mauritania |
| RMS | Tas Aviation | TASS AIR | United States |
| RO | ROT | Tarom | TAROM | Romania |
| ROU | Transportes Aéreos I. R. Crusoe | ROBINSON CRUSOE | Chile |
| RRT | Transportes Aéreos Sierra | SIERRA ALTA | Mexico |
| RRY | Tbilisi Aviation University | AIRFERRY | Georgia |
| RTM | Trans Am Compania | AERO TRANSAM | Ecuador |
| SBJ | Trans Sahara Air | TRANS SAHARA | Nigeria |
| SEI | Transportes Aéreos Sierra Madre | TRANSPORTE SIERRA | Mexico |
| SRT | Trans Asian Airlines | TRASER | Kazakhstan |
| 3T | URN | Turan Air | TURAN | Azerbaijan |
| T4 | TIB | TRIP Linhas Aéreas | TRIP | Brazil | IATA code 8R changed to T4 (2010) |
| USB | Tusheti | TUSHETI | Georgia |
| UTM | TAPC Aviatrans Aircompany | AVIATAPS | Uzbekistan |
| UTN | Trans-Ulgii | TRANS-ULGII | Mongolia | defunct |
| UTT | Transarabian Transportation Services | ARABIAN TRANSPORT | Uganda |
| VEN | Transaven | TRANSAVEN AIRLINE | Venezuela |
| VIP | Tag Aviation UK | SOVEREIGN | United Kingdom |
| L6 | VNZ | Tbilaviamsheni | TBILAVIA | Georgia |
| VRC | Taxi de Veracruz | VERACRUZ | Mexico |
| XN | XAR | XpressAir | XPRESS | Indonesia | Renamed from Travel Express Aviation Services in 2012 |
| XNR | Taxi Aero Del Norte | TAXI NORTE | Mexico |
| VO | TYR | Tyrolean Airways | TYROLEAN | Austria | Renamed from Austrian Arrows |
| TX | TAN | Transportes Aéreos Nacionales | Honduras | Defunct |
| OR | TFL | TUI Airlines Netherlands | ORANGE | Netherlands |
| GS | GCR | Tianjin Airlines | BO HAI | China |
| TZ | Tsaradia | Madagascar |
|
1. ^1 2 3 {{cite web|url=http://www.faa.gov/documentLibrary/media/Order/7340.2E_Basic.pdf|title=FAA Document JO 7340.2E|publisher=}}
2. ^https://www.faa.gov/documentlibrary/media/order/7340.2g_chg_1_dtd_4-27-17.pdf
3. ^{{cite web|title=IATA - Airline and Airport Code Search|url=http://www.iata.org/publications/Pages/code-search.aspx|website=iata.org|accessdate=11 April 2015}}
{{#section:List of airline codes|footer}}