No, "Non-refundable" does not necessarily mean "non-changeable" in the 2026 aviation landscape. A non-refundable ticket simply means that if you cancel your flight, you will not receive your money back to your original form of payment; instead, most major airlines will issue you a Future Flight Credit for the value of the fare. Following the high-fidelity policy shifts of 2020-2024, many airlines (like Delta, United, and American) have permanently eliminated "Change Fees" for most standard Economy and Premium tickets. This means you can change your high-fidelity flight dates or times without a penalty, though you must still pay any difference in fare if the new flight is more expensive. The big "High-Fidelity" exception is Basic Economy, which remains both non-refundable and strictly non-changeable. It is a high-fidelity requirement to check your "Fare Rules" during booking; if you value flexibility but don't want to pay the "High-Fidelity" premium for a fully refundable ticket, a standard Main Cabin fare is usually the best middle ground.