Alaska Airlines is charging passengers $25 for a second checked bag since May 21, 2008. First class passengers, Mileage Plan members and customers on flights within the state of Alaska are exempt from the new fee. Additional fee changes introduced on May 21 included an increase from $25 to $50 for overweight baggage; transporting pets in the cabin one-way increased from $75 to $100; the unaccompanied minor fee increased from $30 to $75 for nonstop flights and from $60 to $75 for connecting flights. And if you book a ticket through reservations, the fee is now $15 instead of $10.