All of the Airports I have used

SJC - San Jose (21)
PHL - Philadelphia (19)
LAS - Las Vegas (5)
SFO - San Francisco (5)
STL - St. Louis (4)
PDX - Portland (4)
ORD Chicago-O'hare (4)
SAN - San Diego (4)
ABQ - Albuquerque (4)
PHX - Phoenix (3)
ATL - Atlanta (2)
SEA - Seattle(2)
BUR - Burbank (2)
OAK - Oakland (2)
IND - Indianapolis (2)
MSP - Minneapolis/St Paul, MN (1)
DAY - Datyon (1)
PIT - Pittsburgh (1)
TUS - Tucson (1)
CVG - Cincinnati (1)
DEN - Denver (1)
SLC - Salt Lake City (1)
LAX - Los Angeles(1)
IAH - Houston (1)