Yes, you can still ask for a seat upgrade at the gate in 2026, though the process has become increasingly automated. Most airlines now offer "last-minute" upgrades via their mobile apps during the 24-hour check-in window. If seats are still available at the gate, agents may offer them for cash or miles, often at a discounted "day-of-departure" rate. For elite frequent flyers, complimentary upgrades are usually processed automatically by the system in a specific priority order, so the gate agent may have limited power to "manually" bump you up unless there are operational issues like overbooking. It is a "pro-tip" to arrive at the gate early and politely check with the agent; while "dressing well" no longer guarantees a free upgrade, being kind during a stressful boarding process can sometimes lead to a "favor" if the flight is unbalanced or a seat has just opened up.