O'Hare hub congestion

Chicago O’Hare is heading into Memorial Day as the nation’s busiest airport by flight volume, with federal regulators already stepping in to trim summer schedules. (federalregister.gov) The Federal Aviation Administration said O’Hare’s published Summer 2026 schedules would exceed the airport’s capacity and set a temporary limit of 2,708 operations a day from May 17 through October 24, 2026. The order cites airfield construction and scheduling pressure from the airport’s two largest carriers. (federalregister.gov) Chicago had already moved to the top of the U.S. rankings before the summer rush. The city said O’Hare logged 857,392 takeoffs and landings in 2025, and January 2026 operations totaled 64,695, ahead of Atlanta’s 61,776. (chicago.gov, islands.com) Memorial Day in 2026 falls on Monday, May 25, placing one of the year’s biggest leisure-travel weekends directly inside the period when the Federal Aviation Administration says O’Hare needs capped schedules. (federalpay.org, federalregister.gov) The Federal Aviation Administration said the cap is meant to prevent delays from getting worse than they were in Summer 2025 and to reduce “substantial inconvenience” for travelers. The agency said the limit should improve safety, efficiency and surface movement in a constrained taxiway environment. (federalregister.gov) Travelers passing through O’Hare in late May are likely to hit the same choke points that show up at major hubs first: security lines, gate crowding and tighter recovery when weather or a late inbound aircraft knocks flights off schedule. O’Hare’s summer peak-day traffic was projected to rise 14.9% in 2026 based on published schedules before the cap was imposed. (islands.com, federalregister.gov) The holiday itself tends to bunch passengers onto a few days. NerdWallet’s review of Transportation Security Administration checkpoint data from 2023 through 2025 found the Friday before Memorial Day was the busiest pre-holiday flying day, while the Sunday after drew the biggest post-holiday crowds. (nerdwallet.com) The Transportation Security Administration treated Memorial Day as the start of the summer travel season last year and expected to screen about 18 million passengers and crew from Thursday, May 22, through Wednesday, May 28, 2025. The agency also said higher passenger volumes usually persist until Labor Day. (tsa.gov) O’Hare is also expanding even as it strains under current demand. Chicago says the airport’s $1.3 billion, 19-gate Concourse D project is scheduled for completion in late 2028, part of a broader push to add capacity after O’Hare reclaimed the top U.S. slot for aircraft movements. (chicago.gov) For Memorial Day travelers, that leaves a simple reality at O’Hare this year: one of the country’s biggest holiday weekends is arriving just as regulators are acknowledging the airport cannot handle all the flights airlines wanted to run. (federalregister.gov, federalpay.org)