RELATED: Never Do This If You’re on an Oversold Flight, Expert Warns. A flight delay might prompt you to drag your feet in terms of getting to the airport, but travel experts strongly advise against this. Maria LaDuca, the owner of luxury travel firm The Agency Chic, says that when flying, you should “always arrive at the gate before your scheduled departure time, regardless if there is a delay.” According to LaDuca, many airlines include this same guidance on their websites. “If your flight is delayed, please arrive at the airport to check-in based on your originally scheduled departure time,” American Airlines states on its website. “Check-in will continue to close at the usual time. If you arrive after check-in has closed you will not be able to fly.” RELATED: Never Do This When Your Flight Is Canceled, Travel Expert Warns. The reason you want to arrive to the airport before your flight’s original time is because “flight delays are usually not reliable estimates,” says Becky Moore, a travel expert and founder of travel resource GlobalGrasshopper. Flights can be delayed for various reasons, and how quickly these issues are resolved can vary quite a bit.ae0fcc31ae342fd3a1346ebb1f342fcb According to LaDuca, airlines delays can occur for many reasons, including bad weather and mechanical problems, along with physical plane and staff delays from another airport. Airlines will give an estimated time based on how long they believe these issues will take to fix, but these problems can always be sorted out earlier than expected. “You never know when the delay could be shortened,” Eva Lerma, a travel counselor and co-founder of MyTravelTripod, warns, adding that airlines reserve the right to move up or cancel delays if the situation has changed. Delay or no delay, experts say you should be arriving to the airport hours before your original departure time. “You should arrive at the airport at least two hours before the originally scheduled flight, even if there is a delay,” Lerma recommends. For international flights, some airlines, like American Airlines, advise you reserve an additional hour and arrive three hours before your scheduled departure time. “Arrive as early as you can,” Moore advises. “According to the Transportation Security Administration’s (TSA) website, passengers are not allowed to board the aircraft more than 30 minutes after the aircraft’s scheduled departure time.” RELATED: For more travel advice delivered straight to your inbox, sign up for our daily newsletter. If you’re traveling for the holidays this year, experts say following this timeline for airport arrival is “critical” right now, and you may want to consider allotting yourself even more than two or three hours. A combination of high demand for travel, airline staffing shortages, and long security lines can lengthen the amount of time between when you arrive at the airport and when you get to your gate. “Passengers should not cut it close or they could definitely miss their flight. We want to avoid any backlog at the TSA passenger screening checkpoint,” Thomas R. Stoudt, executive director of the Lehigh-Northampton Airport Authority in Pennsylvania’s Lehigh Valley, told The Morning Call. A pilot shortage might already be occurring, as Delta Air Lines recently had to cut flights due to a lack of available pilots. And holiday travel demand has been well documented, with two million people traveling through airports over Thanksgiving weekend this year, according to the TSA. Christmas is expected to turn out a similar crowd. “People aren’t going to forgo being home for the holidays for a second year in a row,” Narendra Khatri, principal of Insubuy, a travel insurance company, told The Washington Post. “Expect airports and flights to be more packed than ever around Thanksgiving and Christmas. This means more flight delays, cancellations, and long layovers.” RELATED: If You’re Offered This on a Plane, Just Say No, Flight Attendants Warn.