The cost to change a seat varies wildly depending on the airline, the type of fare you purchased, and the "quality" of the new seat. On major full-service carriers like Delta or United, changing your seat to another "Standard" seat in the same cabin is usually free if you have a standard economy ticket. However, if you are moving to a "Preferred" seat (near the front) or an "Extra Legroom" seat (like Comfort+ or Main Cabin Extra), the fee can range from $15 to over $150 per segment. For those on "Basic Economy" tickets, many airlines now charge a fee just to access the seat map at all, often starting around $10. On low-cost carriers like Ryanair or Spirit, almost any seat change incurs a fee, typically between $5 and $40. In 2026, some airlines have also introduced "dynamic seat pricing," where the cost of a seat change fluctuates based on the flight's duration and the remaining inventory, making it cheaper to secure a specific spot during the initial booking rather than waiting until the 24-hour check-in window.