Hold onto your hats (and bags). Travelers to Europe face chaos.

The start of the summer travel season in Europe has been marred by chaos at airports and popular tourist destinations as airlines, government agencies and industry operators struggle to meet travel demand, which, in some spots, has already surpassed 2019 levels. The mayhem is likely to get worse, travel experts warn, as more people decide to travel following the recent decision by the Biden administration to drop its coronavirus testing requirement for international air travel. Hundreds of flights have been canceled and delayed daily at major European airport hubs over the past two weeks. At London’s Heathrow and Amsterdam’s Schiphol airports, passengers waited up to six hours in security lines, and those waiting to check-in spilled out of the terminals into parking lots. “It was just huge crowds of confused and frustrated people everywhere and no information,” said Eliza Glass, 28, who arrived at Heathrow earlier this month to find her flight to Toronto had been canceled. “After one hour of walking around in circles, I just sat on my suitcase and cried.” In the United States, airports and airlines face labor shortages, adverse weather conditions and a rise in worker coronavirus cases, but wait times, delays and cancellations have not reached the same level. Airlines canceled more than 2,800 flights over the Memorial Day weekend and 20,644 flights were delayed, according to FlightAware, an aviation data site, and several air carriers, including Delta Air Lines, JetBlue Airways and Spirit Airlines, are reducing their summer schedules to help prevent further disruptions.<br/>