Originally Posted by fgirard

However, with WN, any change in flights "may" result in a fare increase. Therefore, if you need to change you flight, WN can charge the difference between the booked class, and the fully refundable class which is a very large differential. For example, from PVD-BWI, the ticket (14 day purchase), can be as low as $39. However, if you need to change that flight, WN can charge the difference between the old fare and the new (fully refundable) fare, which sometimes is $200. Therefore $200 - $39 = $161, and if enough people do this, then they don't need to charge baggage fees as if the standard fee is $20/bag, then 8 fees would be waived just by that change.