Welcome aboard, andrewskhg

The letters used to define a specific booking class is different on each (well ok, almost) airline.

e.g. for AZ (Alitalia), the booking codes are the following:

A is the class code, AZ the airline code


Class Code ¦ Airline Code ¦ Description
A AZ FIRST CLASS
AN AZ FIRST CLASS
B AZ ECONOMY
BN AZ ECONOMY
C AZ BUSINESS
CN AZ BUSINESS
D AZ BUSINESS
DN AZ DELUXE NIGHT
E AZ SHUTTLE SERVICE
F AZ FIRST CLASS
FN AZ DELUXE NIGHT
H AZ ECONOMY
HN AZ ECONOMY
I AZ BUSINESS CLASS
J AZ BUSINESS
K AZ ECONOMY
KN AZ ECONOMY
L AZ ECONOMY
M AZ ECONOMY
N AZ ECONOMY
O AZ ECONOMY
P AZ FIRST CLASS
Q AZ ECONOMY
R AZ ECONOMY
S AZ STANDARD
T AZ ECONOMY
U AZ COACH
V AZ ECONOMY
W AZ ECONOMY
X AZ ECONOMY
Y AZ ECONOMY
YN AZ ECONOMY
Z AZ DISCOUNT BUSINESS