VOUCHERS FOR GIVING UP SEATS ARE UNUSABLE
Dont ever give up your seats for vouchers for "Free Flights"is a lie. I have been trying to use mine for months and they tell me the destinations i want are full, but thats a lie because there are seats available. A moment ago a customer sevice representative told me that there are destinations blocked for vouchers. Be aware i have the oversales denied boarding regulations with the voucher and it specifys: "the carrier must disclose all material restrictions on the use of the free or discounted transportation before the customer descides to acccep..." Also if Spirit cant provide alternate transportation in less than 4hrs the compensation is $800 and they have to give it in Cash or Check if you don't accept.
So if you decide to use Spirit despite all of this comments, if the oversale, don't accept a voucher ask for you $400 or $800 cash.
And start flying with other airlines. I calculated and the prices ar sky high when you add the cost of the bags. Its better to pay 10 or 20 more and be more confortable and flight with an airline that responds.
Review about: Spirit Airlines Flight.