Yes, double strollers are generally allowed in airports, but they are subject to specific size and security regulations that vary by airline and airport authority. Most major airlines allow you to use a double stroller throughout the terminal right up until the aircraft door, at which point you can "gate check" it for free. This is incredibly helpful for parents navigating long walks between gates with two children. However, there is a catch: if the double stroller is an exceptionally large "side-by-side" model or a heavy jogging stroller, it may be too big to fit through the standard X-ray security scanners. In these cases, TSA or security agents will have to perform a manual "gate-pass" inspection, which can take extra time. Some airlines also have weight limits (often around 20 lbs or 9 kg) for strollers that are eligible for gate checking; if your double stroller exceeds this, they may require you to check it at the main ticket counter as oversized luggage. It is always recommended to check your specific airline’s "infant equipment" policy and ensure your stroller can be folded easily, as you will be required to collapse it at the security checkpoint.