Spirit Airlines Prepay Baggagecan help you save money before your trip even begins. Paying for your carry-on or checked bag online is usually cheaper than purchasing baggage at the airport or boarding gate. You can easily add bags while booking your flight or later through the Manage Trip option. Be sure to check Spirit's baggage size and weight limits to avoid additional fees. Planning ahead not only reduces travel costs but also makes the check-in process quicker and smoother. Prepay your baggage and enjoy a hassle-free journey with Spirit Airlines.