https://www.npr.org/2022/06/23/1106968358/travel-plans-to-or-across-europe-prepare-for-long-lines
My daughter left Amsterdam after 4+ hours of getting through check-in and security. She was with some people who were almost certainly going to miss their flights.
Devin Matte, Somerville, Massachusetts: "I talked to one guy who had flown from Atlanta to Amsterdam the night before, and he had to sleep in the airport. People at the airport said it was about six hours to get through security." When rebooking his flight, the customer service agent told him to prepare for six hours to get through security.
Pent-up demand along with pilot and staff shortages seem to be the culprits.
Brigette Armand of Eurobound said this summer has been the most hectic travel season of her career, 27 years.