If you fly within or from the United States, a quiet rule change taking effect on October 19 could change what you're owed the next time your flight falls apart. The Department of Transportation has redefined which disruptions count as 'outside an airline's control' — and the new list is long enough that carriers will have considerably more room to refuse meals, hotels, and other care.

Some context: unlike Europe, where EU261 rules legally require airlines to pay compensation for significant delays, the US has no such law. Instead, the nine major American carriers have made voluntary commitments via their customer service plans. Those promises are real but modest: meals or vouchers when a delay or cancellation the airline caused stretches past three hours, and — from every carrier except Frontier — a hotel room if an airline-caused cancellation strands you overnight.

The catch has always been the word 'caused'. Under the previous, broader interpretation, things like maintenance problems, crew scheduling snafus and aircraft cleaning sat firmly on the airline's side of the ledger. The amended regulation now carves out ten specific scenarios that no longer count against the carrier. Some are unsurprising: extreme weather, sabotage, volcanic ash closing an airport, a cybersecurity attack (assuming the airline met its regulatory obligations), or a sudden government system failure that grounds flights.

Others will feel like the airline getting a generous pass. Unscheduled maintenance discovered outside the normal maintenance program is now off the hook, so long as it couldn't be deferred. So is a medical emergency onboard, the removal of an unruly passenger, overheated brakes after an emergency procedure, a baggage-system outage not controlled by the carrier, and — perhaps the most grimly specific item on the list — aircraft cleaning required after a passenger dies. If any of these triggers your multi-hour delay, the airlines' compensation commitments no longer apply.

The federal government still says it will hold airlines to whatever they've promised in their customer service plans. But with the list of excusable disruptions expanded this much, that accountability amounts largely to carriers grading their own homework. The industry's trade body, IATA, has welcomed the direction, arguing that compensation mandates don't fix the root causes of delays and that 'market forces' will push airlines to look after customers anyway. Sceptics point out that the voluntary system was already the status quo — and it has never been especially generous.

For travellers, the takeaway is straightforward: don't count on the airline if things go wrong. A good travel insurance policy that covers delay expenses and trip disruption is now more useful than ever for US itineraries, since it's the one safety net that doesn't evaporate when the airline invokes 'uncontrollable maintenance'. Keep receipts for meals and hotels, know that your strongest entitlements are for delays over three hours or overnight cancellations, and remember that a few carriers — Frontier notably — never offered hotel coverage at all. If you're connecting through a US hub on a tight itinerary, building in a buffer matters more than it did last month.