The Northeast flight meltdown snarled thousands of flights, and here is what your airline really owes you

• On Monday 21 September a failed circuit at the FAA’s Philadelphia radar facility, plus a cut backup fibre line in New Jersey, triggered ground stops at Newark, Philadelphia, LaGuardia, JFK and Teterboro
• Ground stops began around 10 a.m. and operations resumed about 5 p.m., with departure delays of up to 150 minutes
• US rules: a cash refund if the airline cancels or significantly changes your flight and you decline the alternative, but no cash compensation for a delay
• UK rules: food, drink and a hotel if needed plus a refund or reroute, but an air traffic control cause normally removes the £220 to £520 payout

If air traffic control caused your delay or cancellation, you are owed a refund if you decide not to travel, and under UK rules also meals and a hotel while you wait, but almost certainly no cash compensation. That is the short answer after Monday’s equipment failure grounded and delayed flights across the US Northeast.

The detail matters, because the rules differ sharply between the US and the UK, and the airline agent at the desk will not read them out to you.

Ground stops hit Newark, Philadelphia, LaGuardia and JFK for about seven hours

A failed primary circuit at the Philadelphia Terminal Radar Approach Control facility, combined with a severed backup fibre line in New Jersey, left the FAA holding flights on the ground across the Northeast for roughly seven hours on Monday 21 September.

NJ Transit said a construction crew on its Delco Lead project, between New Brunswick and North Brunswick, cut the cable at about 9:45 a.m. Verizon said the fibre was its own, cut by a New Jersey Transit crew. Newark, Teterboro, Philadelphia, LaGuardia and JFK were all affected, and Transportation Secretary Sean Duffy said the incident showed the need for more funding to modernise ageing infrastructure.

Outlets gave different cancellation counts through the evening, so check your own flight in the airline app rather than trusting a headline number.

A US airline owes you a refund if you give up the trip, but not cash for the delay

Under US Department of Transportation rules, an airline must refund you in cash if it cancels your flight or changes it significantly and you choose not to take the alternative it offers. A significant change means a delay of three or more hours on a domestic flight or six or more on an international one, a different airport, an extra connection or a downgrade in cabin.

DOT says card refunds must arrive within seven business days, and other payment methods within 20 calendar days. There is no federal rule that pays you extra for a delay, and none that forces an airline to buy you a meal or a hotel room.

The big US airlines publish their own customer service commitments, tracked on DOT’s dashboard, covering rebooking, meals and hotels. Those promises apply to problems within the airline’s control, such as crew or mechanical faults, and air traffic control is not one of them. You can still ask for help, but do not plan around getting it.

A UK passenger gets care and a refund or reroute, but probably not the £520

If UK261 covers your flight, the airline must look after you and give you a choice of a refund or a reroute even when air traffic control is to blame, but the cash compensation is normally off the table. The UK Civil Aviation Authority says extraordinary circumstances, including air traffic control disruption, remove the compensation claim.

UK law covers any flight departing a UK airport, and flights arriving in the UK on an EU or UK airline. A British Airways or Virgin Atlantic flight home from Newark is covered, while a US carrier flying you into Heathrow is not.

For a delay, the airline must provide food and drink after two hours on short flights, three hours on medium and four hours on long-haul, plus a hotel and transport if you are stuck overnight. If staff are overwhelmed, the CAA says you can arrange reasonable care yourself and claim it back with receipts.

What to do right now if your trip is caught up in it

Rebook in the airline app before you queue, and if you cannot travel at all, ask for the refund in writing rather than accepting a voucher. Keep every receipt for food, transport and hotels, because you may need them for the airline or for your insurer.

Check your travel insurance for trip delay cover, which usually starts after a set number of hours, and read whether air traffic control disruption is excluded. If you are on a package trip, the operator carries extra responsibility for getting you to your destination, so contact them as well as the airline.

Sources: NBC News reporting on the 21 September outage, the UK Civil Aviation Authority delay and cancellation guidance, and US Department of Transportation refund rules.

Cover photo: skinnylawyer from Los Angeles, California, USA via Wikimedia Commons (CC BY-SA 2.0). Section photos: Curtis Cheng via Pexels (Pexels licence); Magda Ehlers via Pexels (Pexels licence); Kenneth Surillo via Pexels (Pexels licence); Tristan Wong via Pexels (Pexels licence).