How much does it cost to add a bag to a Frontier flight?

Adding a bag to a Frontier Airlines flight typically costs $35 to $99, depending on whether its a carry-on or checked bag and when you purchase it. Booking bags during initial flight purchase saves the most money. Carry-ons can cost up to $99 at the gate, while checked bags start around $35 if prepaid online. Oversized or overweight bags may incur extra charges. For the best rates and assistance, call +1-877-622-0707. Booking early and checking bag size and weight are key to avoiding high feesdial +1-877-622-0707 for detailed help.