As of calendar year 2013:
The Important Stuff
Sydney (SYD) – 38,150,546
Melbourne (MEL) – 30,220,427
Brisbane (BNE) – 21,444,838
Perth (PER) – 12,902,047
Adelaide (ADL) – 7,373,874
Gold Coast (OOL) – 5,767,478
Cairns (CNS) – 4,246,422
Canberra (CBR) – 2,956,448
Hobart (HBA) – 2,091,706
Darwin (DRW) – 2,005,431
The Not-So-Important Stuff
Albany (ALH) – 58,903
Albury (ABX) – 259,446
Alice Springs (ASP) – 655,245
Armidale (ARM) – 108,026
Ayers Rock (AYQ) – 233,394
Ballina (BNK) – 382,347
Bamaga (ABM) – 12,132
Bathurst (BHS) – 19,617
Bathurst Island (BRT) – 17,551
Biloela/Thangool (ZBL) – 18,725
Broken Hill (BHQ) – 61,268
Broome (BME) – 413,633
Bundaberg (BDB) – 153,402
Burnie (BWT) – 68,453
Carnarvon (CVQ) – 27,368
Ceduna (CED) – 21,635
Charleville (CTL) – 15,600
Christmas Island (XCH) – 36,005
Cloncurry (CNJ) – 8,945
Cobar (CAZ) – 10,431
Cocos (Keeling) Islands (CCK) – 8,145
Coffs Harbour (CFS) – 387,384
Coober Pedy (CPD) – 9,869
Cooktown (CTN) – 9,077
Derby-Curtin (DCN) – 43,409
Devonport (DPO) – 127,776
Doomadgee (DMD) – NO NEW DATA RETRIEVED
Dubbo (DBO) – 176,132
Elcho Island (ELC) – 7,436
Emerald (EMD) – 283,233
Esperance (EPR) – 48,163
Essendon (MEB) – 17,227
Flinders Island (FLS) – 19,920
Geraldton (GET) – 128,084
Gladstone (GLT) – 494,782
Gove (GOV) – 108,618
Grafton (GFN) – 13,402
Griffith (GFF) – 62,701
Groote Eylandt (GTE) – 32,609
Hamilton (HLT) – NO NEW DATA RETRIEVED
Hamilton Island (HTI) – 465,300
Hervey Bay (HVB) – 150,371
Kalgoorlie (KGI) – 241,418
Karratha (KTA) – 770,950
King Island (KNS) – 33,589
Kingscote (KGC) – 38,370
Kununurra (KNX) – 91,064
Launceston (LST) – 1,257,145
Learmonth (LEA) – 91,743
Leonora (LNO) – 12,983
Lismore (LSY) – 33,026
Longreach (LRE) – 31,023
Lord Howe Island (LDH) – 33,958
Mackay (MKY) – 1,102,954
Maningrida (MNG) – 13,059
Merimbula (MIM) – 45,586
Mildura Airport (MQL) – 217,980
Moorabbin (MBW) – 9,766
Moranbah (MOV) – 174,892
Moree (MRZ) – 27,095
Mornington Island (ONG) – 10,050
Moruya (MYA) – 18,670
Mount Gambier (MGB) – 80,685
Mount Isa (ISA) – 254,268
Mudgee (DGE) – 8,875
Narrabri (NAA) – 12,928
Narrandera (NRA) – 12,118
Newman (ZNE) – 450,190
Norfolk Island (NLK) – 56,604
Normanton (NTN) – NO NEW DATA RETRIEVED
Olympic Dam (OLP) – 77,009
Orange (OAG) – 58,204
Palm Island (PMK) – 26,059
Paraburdoo (PBO) – 232,293
Parkes (PKE) – 26,105
Port Augusta (PUG) – 9,181
Port Hedland (PHE) – 483,541
Port Lincoln (PLO) – 189,615
Port Macquarie (PQQ) – 228,464
Portland (PTJ) – 7,635
Proserpine (PPP) – 234,402
Ravensthorpe (RVT) – 7,653
Rockhampton (ROK) – 696,502
Roma (RMA) – 214,608
Sunshine Coast (MCY) – 866,504
Tamworth (TMW) – 157,684
Taree (TRO) – 16,756
Thursday Island (TIS) – 92,273
Toowoomba (TWB) – 19,163
Townsville (TSV) – 1,556,579
Wagga Wagga (WGA) – 208,625
Weipa (WEI) – 69,930
Whyalla (WYA) – 66,828
Newcastle - Williamtown (NTL) – 1,206,517