ORLANDO, Fla. -

Spirit Airlines is facing a possible class-action lawsuit over a fee that a passenger claims is deceptive.

The low-cost carrier was sued in Miami federal court on behalf of a New Jersey man who paid $16 for a so-called “passenger usage fee” when he purchased a Spirit ticket. The suit seeks class action status to represent thousands of passengers who also paid the fee.

The focus of the lawsuit is the definition of that fee, one of many that Spirit imposes on passengers. According to the plaintiff’s attorneys, the “passenger usage fee” has no real value and Spirit has misrepresented it as required or sanctioned by the government.

Spirit has said the fee is used to cover ticket distribution costs. A company spokeswoman said today that the lawsuit is without merit and that Spirit will defend itself in court.

Spirit often offers the lowest fares between city pairs it services, but the airlines also charges up to $50 for advanced seat assignments, and from $20 to $45 for a carry-on bag.

Here are some of the other fees you should know about when booking with Spirit:

• $10 Reservation booking fee
• $18-$38 First checked bag
• $25-$45 Second checked bag
• $5 Printed boarding pass by check-in agent
• $2 Printed boarding pass at kiosk (eff. 10/31/12)
• $1-$15 Onboard snacks and drinks