"Such a comparison is irrelevant, since AirTran's costs are so much lower than UAL's (and, therefore, it will continue to make a profit even if it's RASM growth doesn't keep pace with United's)."
I'll agree it's irrelevent, however, AT RASM DECLINED. If it continues to DECLINE, the profit will go away. AT carries essentially NO cargo, so any objective evaluation MUST consider the added revenue from cargo. Additionally, AT leases essentially it's ENTIRE fleet. they don't enjoy a huge margin between profitablity and positive cash flow.
I'll agree it's irrelevent, however, AT RASM DECLINED. If it continues to DECLINE, the profit will go away. AT carries essentially NO cargo, so any objective evaluation MUST consider the added revenue from cargo. Additionally, AT leases essentially it's ENTIRE fleet. they don't enjoy a huge margin between profitablity and positive cash flow.