While there are only three sections of the aircraft, there are many booking codes in which a traveler can be reserved. There are several booking codes for the coach section of the aircraft. Each booking code corresponds to a different fare. Therefore, passengers may pay different fares for their ticket even though they are sitting right next to each other. The first step in understanding the different fares is to know about the booking code hierarchy. Generally, the codes listed first (reading from left to right) are the most expensive. As you move to the right, the fares get less expensive.
1 DL 1202 F3 C0 Y9 B9 H9 Q7 K4 L0
DL1202 offers booking codes F, C, Y, B, H, Q, K and L. The numbers following each booking code indicate the number of seats available to sell for that particular code. A9 indicates nine or more seats are available to sell at that code. Any number less than 9 indicates only those many seats are available to sell at that code.
The screenshots below show all the different classes of service that a customer can book in the coach section of an airline. It should be noted that two passengers may pay different fares for their respective tickets even though they may be sitting next to each other.
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Concepts and TerminologyConfidential, TRX Inc.7 November 2007