Frontier Check-in Rules Updated: Latest Bag Fees and Policy Shifts
Frontier calculates baggage pricing using variable dynamic scales tied directly to route demand and purchase timing. Every ticket includes only one personal item. The allowed personal item dimensions remain fixed at 14 x 18 x 8 inches, including wheels, straps, and handles. Gate agents monitor these limits using rigid metal sizing boxes stationed at every boarding ramp.
Luggage exceeding those dimensions counts as a standard carry-on. Published carry-on bag size limits are capped at 24 x 16 x 10 inches with a strict 35-pound weight ceiling. Booking a carry-on during initial ticket reservation costs significantly less than adding one at later stages:
Declaring a carry-on bag during the online reservation window typically costs $40, $65. Waiting until mobile check-in raises the fee to $55, $75. Travelers who bring an undeclared bag directly to the gate face fees of $99 or more. Gate personnel routinely require passengers to slot luggage into physical measuring boxes before entering the jet bridge.
Standard checked luggage fees apply to bags measuring under 62 linear inches and weighing up to 40 pounds. Frontier enforces a 40-pound limit rather than the legacy airline standard of 50 pounds. Exceeding 40 pounds triggers heavy overweight surcharges: $50, $75 for weights between 41 and 50 pounds, climbing to $100 for items weighing 51 to 100 pounds.
