Yes, you can ask for an upgrade at the gate, but the days of getting a "free" upgrade just by dressing well or being polite are essentially over. Most gate upgrades in 2026 are "Paid Upgrades" or "Mileage Upgrades." If you see empty seats in Business or First Class, you can politely ask the gate agent: "Are there any paid upgrade offers available for this flight?" Airlines often offer these at a significant discount (sometimes 50–70% off the original price) at the last minute to fill the cabin. If you have elite status, you are likely already on an automated "Upgrade List," but it doesn't hurt to check your position. The best time to ask is about 45 minutes before departure, once the agent has finished the initial check-in rush but before boarding begins. Be kind and discreet; if an agent is going to do you a favor (such as for a honeymoon or a broken seat), they are much more likely to do it for a traveler who isn't making a scene in front of other passengers.