In 2026, the era of the "guaranteed free carry-on" has largely ended for the lowest fare classes. While "Full Service" carriers like Delta, American, and Southwest still include a carry-on in their standard economy fares, many have introduced "Basic Economy" or "Saver" tiers that restrict you to only a "personal item" (like a small backpack) that must fit under the seat in front of you. If you show up at the gate with a roller bag on these tickets, you will be charged a "Gate Handling Fee" that can be as high as $65 to $100. Almost all "Ultra-Low-Cost Carriers" (ULCCs) like Ryanair, Spirit, and Frontier now charge for overhead bin access as a standard "unbundled" fee. For 2026 travelers, the "pro-tip" is to carefully read the "Baggage Allowance" section of your confirmation; if it says "Personal Item Only," you should either pay for the bag online in advance (which is 50% cheaper than at the airport) or master the art of "one-bag" travel using a high-capacity under-seat backpack to avoid these punitive fees.