Low Fares Done Right | Frontier Airlines Frontier Airlines General Checked Bag Information. If you have a bag (or multiple bags) that you don’t need to have close to you during your flight, check it! Checked bags must be within 62 linear inches (that’s length + width + depth) and no heavier than 50 pounds.Baggage that goes over these limits will be charged an additional $75 for exceeding weight and an additional $75 for exceeding linear inch limits.