US air travellers face the worst spring flight chaos in years as three separate crises collide at airports nationwide, forcing thousands of delays, a crumbling airport security workforce, and an Iran-war fuel shock that is pushing airlines to slash routes.

The US aviation system recorded more than 3,000 delays and 105 cancellations on Tuesday, with San Francisco International Airport leading the disruption after the Federal Aviation Administration (FAA) imposed weather-related traffic restrictions. SFO alone logged 475 delays and 69 cancellations, according to FAA data and FlightAware tracking.

Hartsfield-Jackson Atlanta, Boston Logan, and John F. Kennedy International followed as the worst-hit hubs, with spillover reaching Houston, San Diego, and Indianapolis. SkyWest, United, Southwest, American, and Delta carried the bulk of the cancellations. American and SkyWest have posted the highest disruption volumes throughout the spring peak.

Security lines are the hidden accelerant. The Department of Homeland Security (DHS) ran out of funding on 14 February, leaving Transportation Security Administration (TSA) officers working without pay for weeks.

With the World Cup countdown now under 60 days, the agency is running out of time to stabilize.

McNeill confirmed that more than 480 officers have quit since the February funding lapse, and because training new recruits takes four to six months, any hiring surge now will not be operational until well after the tournament ends.

Testifying before Congress in late March, acting TSA administrator Ha Nguyen McNeill described the current delays as the highest wait times in the agency's history. 'We are facing a potential perfect storm,' she warned, noting that the agency projects 6 to 10 million additional travelers for the World Cup.

A late-March executive order from President Donald Trump directed DHS to pay TSA officers from existing funds, but union figures say the structural damage is done. New recruits need four to six months of training before they can staff checkpoints.

The third crisis is buried inside ticket prices. A US naval blockade of the Strait of Hormuz, imposed after the 28 February strikes on Iran, has effectively closed the waterway that carries roughly 20% of global oil supply. US jet fuel prices have nearly doubled from $2.50 (£1.85) a gallon before the war to $4.88 (£3.61) by early April.

United Airlines chief executive Scott Kirbywarned staff in Marchthat sustained prices would add $11 billion (£8.1 billion) to the airline's annual fuel bill. 'In United's best year ever, we made less than $5 billion (£3.7 billion),' Kirby wrote. United has cut about 5% of planned flights over the next six months.

Source: International Business Times UK