updated, forgot some, had some dupes and added some over the past 10 years.
now stands at 201
USA - 163
6Y8 Beaver Island, MI
ABE Allentown/Bethlehem/Easton, PA
ABQ Albuquirky, NM
ACK Nantucket, MA
ACY Atlantic City
ALB Albany, NY
AOO Altoona, PA
APN Alpena, MI
ARC NASA Ames Research Center
ART Watertown, NY
ASE Aspen, CO
ATL Atlanta
AUS Austin, TX
AVP Scranton/Wilkes-Barre, PA
AZO Kalamazoo, MI
BDL Hartford, CT
BFD Bradford, PA
BFI Seattle - Boeing
BFL Bakersfield, CA
BGM Binghampton, NY
BGR Bangor, ME
BJI Bemidji, MN
BNA Nashville
BOS Boston
BUF Buffalo, NY
BUR Burbank - Bob Hope
BWG Bowling Green, KY
BWI Baltimore
CAK Akron, OH
CIO Sault Ste Marie, MI
CLE Cleveland
CLT Charlotte
CMH Columbus, OH
COS Colorado Springs
CSG Columbus, GA
CVG Cincinnati
CVX Charlevoix, MI
DAB Daytona Beach, FL
DAL Dallas - Love
DCA Washington DC - Reagan
DED Deland, FL
DEN Denver, baggage smashing
DEN Denver, Stapleton
DET Detroit City
DFW Dallas
DLH Duluth, MN
DSM Des Moines, IA
DTW Detroit
EGE Vail, CO
ELM Elmira, NY
ELP El Paso, TX
ERI Erie, PA
ESC Escanaba, MI
EWR Newark
FAT Fresno, CA
FNT Flint, MI
FSD (SUX) Sioux Falls, SD
FWA Fort Wayne, IN
FYV Fayetteville City, AR
GPZ Grand Rapids, MN
GRB Green Bay, WI
GRR Grand Rapids, MI
HGR Hagerstown, MD
HNL Honolulu
HOU Houston
HPN White Plains, NY
HVN New Haven, CT
HYA Hyannis, MA
IAD Washington DC - Dulles
IAH Houston - Bush
ILG Wilmington, DE
IMT Iron Mountain, MI
IND Indianapolis
IPT Williamsport, PA
ISP Islip, Long Island
ITC Wichita, KS
JFK NYC
LAN Lansing, MI
LAS Las Vegas
LAX Los Angeles
LBE Latrobe, PA
LEX Lexington, KY
LGA NYC
LIT Little Rock, AR
LNK Lincoln, NE
LNS Lancaster, PA
MBS Bay City, MI
MBS Sagniaw, MI
MCI Kansas City
MCO Orlando
MDT Harrisburg, PA
MDW Chicago
MEM Memphis
MGW Morgantown, WV
MHT Manchester, NH
MIA Miami
MKE Milwaukee
MOT Minot, ND
MQT Marquette, MI
MQT Marquette - Sawyer
MRY Carmel, CA
MRY Monterey, CA
MSN Madison, WI
MSP Minneapolis
MSY New Orleans
OAK Oakland, CA
OGG Maui
OKC Oklahoma City
OMA Omaha, NE
ONT Los Angeles - Ontario
OPF Miami - Opa Locka
ORD Chicago
ORH Worchester, MA
OSH Oshkosh, WI
PBI West Palm, FL
PDX Portland, OR
PHL Philadelphia
PHL Phoenix
PIE Tampa/St. Pete
PIH Pocatello, ID
PIT Pittsburgh
PLN Pellston, MI
PNE NE Philly
PSP Palm Springs, CA
PTK Pontiac, MI
PVD Providence, RI
PVU Provo, UT
PWM Portland, ME
RDG Reading, PA
RDU Raleigh-Durham
RIC Richmond, VA
ROC Rochester, NY
SAN San Diego
SAT San Antonio, TX
SAV Savannah/Hilton Head, GA
SBA Santa Barbara, CA
SBN South Bend, IN
SBP San Luis Obispo, CA
SBS Steamboat Springs, CO
SCE State College, PA
SCK Stockton, CA
SDF Louisville, KY
SEA Seattle
SFB Orlando - Sanford
SFO San Francisco
SJC San Jose
SJU San Juan, PR
SLC Salt Lake City
SMF Sacramento
SMX Santa Maria, CA
SNA Los Angeles - John Wayne
STL Saint Louis
SWF Newburgh, NY
SYR Syracuse, NY
TAL Tallahassee, FL
TPA Tampa
TUL Tulsa, OK
TUS Tucson, AZ
TVC Traverse City, MI
VIS Visalia, CA
WBW Wilkes-Barre/Wyoming Valley, PA
XNA Bentonville, AR
XNZ Fayetteville, AR
Americas - 11
BOG Bogota, Colombia
CBL Ciudad Bolivar, Venezuela
CCS Caracas, Venezuela
MAR Maracaibo, Venezuela
MDE Medellin, Colombia
MEX Mexico City
YOW Ottawa
YUL Montreal
YVR Vancouver
YYC Calgary
YYZ Toronto
Europe - 27
AGP Malaga
AMS Amsterdam
BCN Barcelona
BER Berlin - Brandenburg
BIO Bilbao, Spain
BIQ Biarritz, France
CDG Paris
DUB Dublin
EAS San Sebastian, Spain
FRA Frankfurt
GRX Granada, Spain
HAM Hamburg
LGW London - Gatwick
LHR London - Heathrow
MAD Madrid
MUC Munich
ORY Paris - Orly
PNA Pamplona, Spain
PRG Prague, Czech
SPC La Palma
STN London Stansted
SXF Berlin - Schoenfeld
TFN Tenerife
THF Berlin - Tempelhof
TXL Berlin - Tegel
VIT Vitoria, Spain
VLC Valencia, Spain
zzz