air india Y class V class fare codes

Full fare: Y class, B class
Standard fare: M class H
Special or discount fares: K class, Q class, W class, V class, G class, L class, T , S, E
On most airlines, unrestricted economy ticket is booked as a Y fare. Full fare tickets with restrictions on travel dates, refunds, or advance reservations are commonly classed as B, H, or M, although some airlines may use H, V, or others. Heavily discounted fares, commonly S class, T or E class, will not permit cabin upgrades, refunds, or reservation changes, may restrict frequent flyer program eligibility, and/or impose other restrictions.The lower the fare, there will be more restrictions attached to it in terms of cancellation, date change, re-routing or endorsements on another air-line in case of cancellation of your flight. Other fare codes such as X are restricted for use by consolidators, group charters, or travel industry professionals. However on some airlines W or X is used for frequent flier program award redemptions.