If your ticket indicates "no checked bag," you have likely purchased a Basic Economy or "Light" fare, which is a budget-tier category offered by most major airlines in 2026 to compete with low-cost carriers. This fare covers your seat and usually one small personal item, but it explicitly excludes the cost of transporting luggage in the aircraft's hold. Airlines do this to offer the lowest possible base price for travelers who don't need extras. If you realize you need a checked bag, it is highly recommended to add it via the airline’s mobile app or website before arriving at the airport; paying for a bag at the check-in counter is almost always significantly more expensive (often by $20–$50 per bag). Additionally, some "no checked bag" fares may even restrict you from using the overhead bins for a carry-on suitcase, so it is vital to read the specific fare rules of your carrier. If you hold a co-branded airline credit card or have elite status, you may be entitled to a free bag even if your ticket says otherwise, but you will need to ensure your loyalty number is linked to the reservation.