Major December events that affect Benito Juárez International Airport (MEX) arrivals include the Feast of Our Lady of Guadalupe (December 12), which sees pilgrimages and national travel increases, followed by Christmas markets, Nochebuena (Christmas Eve) celebrations, and New Year’s festivities. These events cause elevated demand for flights from John F. Kennedy International Airport (JFK) and other international origins, leading to busier immigration lines, fuller hotels, and increased ground-transport waits. If traveling to Mexico City for holiday festivities, book flights and accommodations early; if avoiding crowds, aim for early- or mid-December travel dates. CTA: Check event dates and adjust your JFK to MEX travel window to either participate in celebrations or bypass peak crowds.