Originally Posted by
skylane
Southwest lets you change your ticket without a change fee. Most of the other airlines charge a $100 change fee.
Actually, the change fee imposed by most airlines is wholly dependent upon the fare class purchased -- $100 is not a set value for all tickets in all circumstances. (AA, for example, has certain change fees that are as low as $30, depending on the route.)
The easy answer to the OP's question that avoids the entire issue of change fees altogether is, incidentally, the purchase of refundable tickets.
Mike