Spirit Bag Fees 2024. The membership costs $69.95 for 12 months, $99.90 ($5 savings) for 18 months and $129.90 ($10 savings) for 24 months. Carefully adhere to all size and weight limits to avoid incurring expensive gate check fees.

Spirit’s maximum allowed weight is 40 lbs for a checked bag, and you’ll pay an overweight fee of $30 for bags weighing between 41 and 50 pounds. 18 x 14 x 8 inches.