I
- ICAO standards and recommended practices
- ice accretion
- ice guard
- ice pellet
- ice storm
- icing
- icing conditions
- ideal angle of attack
- ident
- IDENT feature
- identification beacon
- identification plate
- idle
- idling
- IFR flight
- ILS glide path angle
- impeller
- in-flight emergency
- in-flight entertainment
- in-flight hypoxia
- in-flight medical emergency
- in-flight refuelling
- inbound leg
- inbound turn
- INCERFA
- incident
- inclinometer
- independent parallel approaches
- independent parallel departures
- indicated airspeed
- induced drag
- induction system
- inertial navigation system
- information sign
- initial approach
- initial approach fix
- initial climb
- inner approach surface
- inner horizontal surface
- inner marker
- inner transitional surface
- inspection port
- instructor
- instrument
- instrument approach
- instrument approach chart
- instrument approach procedures
- instrument flight procedure
- instrument flight rules
- instrument flight time
- instrument flying
- instrument landing system
- instrument meteorological conditions
- instrument navigation
- instrument runway
- instrument shelter
- integrity (aeronautical data)
- integrity classification (aeronautical data)
- integrity of aeronautical data
- intermediate holding position
- intermediate holding position lights
- internal combustion engine
- international aeronautical and maritime search and rescue manual
- international air transportation
- international airport
- international civil aviation organization
- international index number
- intersection
- intersection take-off sign
- intertropical convergence zone
- inversion
- inverted engine
- inverted spin
- inward flow turbine
- ionosphere
- ionospheric storm
- isobar
- isogonic lines
- isohyet
- isolated aircraft parking position
- isotherm