Whether you have to pay for an airline seat in 2026 depends entirely on your fare class and how "picky" you are about where you sit. For most "Basic Economy" tickets on major carriers like Delta or United, you do not have to pay a fee, but you will be randomly assigned a seat at check-in, often in the middle. If you want to select a specific seat in advance (like a window or aisle), most airlines now charge a "Seat Selection Fee," which can range from $15 for a back row to over $100 for an exit row or "Preferred" seat. However, if you have elite status, hold a high-tier credit card, or book a "Standard Economy" or "Premium" fare, seat selection is typically included in the ticket price. It is worth noting that some international carriers have moved toward a model where even "Standard" fares require a fee for advance selection. To avoid fees, you can wait until the 24-hour check-in window opens, when many remaining seats are released for free, though options will be limited in a high-fidelity market where premium seats are increasingly monetized.