Originally Posted by
Vit007
Is there a rule of thumb when the different classes are release? ...
Although far out tends to start with all inventory classes opened up, as cheaper fares are sold, the lower fare classes are zero'ed. As time goes on, UA may re-open the lower fare classes.
Originally Posted by
Vit007
.... I would like to pick up L, K, G, N since they would probably be cheaper. .....
There is more to pricing than just fare classes.
There also needs to be a fare rule filed for the fare class with a price. It is not unknown for UA to never file a fare rule for the lowest fare classes --- especially G & N.
Additionally a fare rule for a K fare at 10 months out will not be the same price as a K fare at 1 month out. So you may be able to get a K fare later that is more expensive then a T or S fare today.