| T | Temperature; True (bearing course) |
| T | Transmits only (radio frequencies) |
| t | Tons |
| TA | Transition Altitude |
| TAA | Terminal Arrival Area |
| TAC | Tactical Air Navigation Aid |
| TACAN | Tactical Air Navigation (bearing and distance station) |
| TAR | Terminal Area Surveillance Radar |
| TAS | True Air Speed |
| TC | Transport Canada |
| T/C | Transfer of Control |
| TCA | Terminal Control Area (US) |
| TCAS | Traffic Alert and Collision Avoidance System |
| TCH | Threshold Crossing Height (Synonymous of RDH) |
| TCTA | Transcontinental Control Area |
| TIDWR | Terminal Doppler Weather Radar |
| TDZ | Touchdown Zone |
| TDZ | Touchdown Zone Lights |
| TDZE | Touchdown Zone Elevation |
| TDZL | Touchdown Zone Lights |
| TEC | Tower En route Control |
| TEL | Telephone |
| TELCOM | Telecommunication Service |
| TEMP | Temperature/temporary |
| TERPS | US standards for Terminal Instrument Procedures |
| TFC | Traffic |
| TGL | Touch-and-go Landing |
| TGS | Taxiing Guidance System |
| THR | Threshold |
| THRL | Threshold Lights |
| THRU | Through |
| THU | Thursday |
| TIBA | Traffic Information Broadcasts by Aircraft |
| TIL | Until |
| TIZ | Traffic Information Zone |
| TKOF | Take-off |
| TL | Transition Level |
| TMA | Terminal Control Area |
| TMC | Terminal Control Centre |
| TML | Terminal |
| TMN | Terminates |
| T/O | Take-off |
| TOC | Top of Climb |
| TOD | Top of Descent |
| TODA | Take-off Distance Available |
| TORA | Take-off Run Available |
| TOS | Traffic Orientation Scheme |
| TP | Turning Point |
| TPC | Tactical Pilotage Chart |
| TR | Track |
| TRA | Temporary Reserved Airspace |
| TRACON | Termninal Radar Approach Control |
| TR ALT | Transition Altitude |
| TR HGT | Transition Height |
| TR LEVEL | Transition Level |
| TRA | Temporary Reserved Airspace |
| TRANS | Transmitter/transmitting |
| TRANS | Transition |
| TRANS ALT | Transition Altitude |
| TRANS LEV | Transition Level |
| TRANS HGT | Transition Height |
| TRCV | Tri-Colour Visual Approach Slope Indicator |
| TT | True Track |
| TUE | Tuesday |
| TVOR | Terminal VOR |
| TWEB | Transcribed Weather Broadcast |
| TWIP | Terminal Weather Information for Pilots |
| TWR | Aerodrome Control Tower |
| TWY | Taxiway |
| TWYL | Taxiway Lights |
