I
The DST column shows the months in which Daylight Saving Time, a.k.a. Summer Time, begins and ends. A blank DST box usually indicates that the location stays on Standard Time all year, although in some cases the location stays on Summer Time all year. If a location is currently on DST, add one hour to the time in the Time column.
{| class="wikitable sortable"
! style="text-align:left;" | IATA
! style="text-align:left;" | ICAO
! style="text-align:left;" | Airport name
! style="text-align:left;" | Location served
! style="text-align:left;" | Time
! style="text-align:left;" | DST
<!-- comments added to prevent addition of incorrect IATA codes -->
|- class="sortbottom"
! colspan="6" style="text-align:left; background:#ddd;"| -IA-
|-
| IAA || UOII || Igarka Airport || Igarka, Krasnoyarsk Krai, Russia || UTC+07:00 ||
|-
| IAB || KIAB || McConnell Air Force Base || Wichita, Kansas, United States || UTC−06:00 || Mar-Nov
|-
| IAD || KIAD || Washington Dulles International Airport || Washington, D.C., United States || UTC−05:00 || Mar-Nov
|-
| IAG || KIAG || Niagara Falls International Airport || Niagara Falls, New York, United States || UTC−05:00 || Mar-Nov
|-
| IAH || KIAH || George Bush Intercontinental Airport || Houston, Texas, United States || UTC−06:00 || Mar-Nov
<!-- IAL (Ialibu Airport, Ialibu, Papua New Guinea) deleted. No airport with IATA code of IAL. See http://www.iata.org/publications/Pages/code-search.aspx. Retrieved 19th November 2015 -->
|-
| IAM || DAUZ || In Amenas Airport (Zarzaitine Airport) || In Amenas, Algeria || UTC+01:00 ||
|-
| IAN || PAIK || Bob Baker Memorial Airport || Kiana, Alaska, United States || UTC−09:00 || Mar-Nov
|-
| IAO || RPNS || Sayak Airport || Bahregan Airport || Bahregan, Iran || UTC+03:30 || Mar-Sep
|-
| IAR || UUDL || Golden Ring Yaroslavl International Airport || Yaroslavl, Yaroslavl Oblast, Russia || UTC+03:00 ||
|-
| IAS || LRIA || Iași International Airport || Iași, Romania || UTC+02:00 || Mar-Oct
|-
| IAU || || Iaura Airport || Iaura, Papua New Guinea || UTC+10:00 ||
|-
| IAX || WAMS || Miangas Airport || Miangas, Indonesia || UTC+08:00 ||
|- class="sortbottom"
! colspan="6" style="text-align:left; background:#ddd;"| -IB-
|-
| IBA || DNIB || Ibadan Airport || Ibadan, Nigeria || UTC+01:00 ||
|-
| IBB || SEII || General Villamil Airport || Siquijor, Siquijor, Philippines || UTC+08:00 ||
|-
| IQT || SPQT || Coronel FAP Francisco Secada Vignetta International Airport || Iquitos, Peru || UTC−05:00 ||
|- class="sortbottom"
! colspan="6" style="text-align:left; background:#ddd;"| -IR-
|-
| IRA || AGGK || Kirakira Airport (Ngorangora Airstrip) || Kirakira, Makira Island, Solomon Islands || UTC+11:00 ||
|-
| IRB || || Iraan Municipal Airport (FAA: 2F0) || Iraan, Texas, United States || UTC−06:00 || Mar-Nov
|-
| IRC || PACR || Circle City Airport (FAA: CRC) || Circle, Alaska, United States || UTC−09:00 || Mar-Nov
|-
| IRD || VGIS || Ishwardi Airport || Ishwardi, Bangladesh || UTC+06:00 ||
|-
| IRE || SNIC || Irecê Airport || Irecê, Bahia, Brazil || UTC−03:00 ||
|-
| IRG || YLHR || Lockhart River Airport || Lockhart River, Queensland, Australia || UTC+10:00 ||
|-
| IRI || HTIR || Iringa Airport (Nduli Airport) || Iringa, Tanzania || UTC+03:00 ||
|-
| IRJ || SANL || Capitán Vicente Almandos Almonacid Airport || La Rioja, Argentina || UTC−03:00 ||
|-
| IRK || KIRK || Kirksville Regional Airport || Kirksville, Missouri, United States || UTC−06:00 || Mar-Nov
|-
| IRM || USHI || Igrim Airport
</references>
- - includes IATA codes
- Aviation Safety Network - IATA and ICAO airport codes
- Great Circle Mapper - IATA, ICAO and FAA airport codes