Airspace in the UK was an absolute disaster today, with an ATC meltdown causing hundreds of flights to be canceled, delayed, or diverted. Stuff happens, but what’s perhaps most remarkable is how many flights sat on the taxiway at Heathrow for over five hours, because there simply weren’t any available gates…
Air traffic control failure brings UK aviation to a standstill
Today, Tuesday, September 8, 2026, NATS, the company providing air traffic control and airspace management services in the United Kingdom, suffered a “technical issue.” This caused widespread chaos for the country’s aviation system, with hundreds of flights canceled or delayed.
The technical issue started around 1PM BST, and lasted for nearly four hours. It’s not entirely clear what happened, other than that there was a software bug and technical glitch that basically caused the system to be unusable.
As you’d expect, the implications here are absolutely massive. It’s not like after four hours things go back to normal — no flights could take off, many flights had to divert, and planes and crews were just completely out of place. This is one of the largest widespread air traffic control outages we’ve seen in a long time.
Just to put things into perspective, according to FlightAware data, here’s how things currently stand for today for four of London’s airports:
- London Heathrow Airport (LHR) had 225 flights (32%) canceled and 180 flights (26%) delayed
- London Gatwick Airport (LGW) had 121 flights (29%) canceled and 82 flights (20%) delayed
- London Stansted Airport (STN) had 54 flights (17%) canceled and 83 flights (27%) delayed
- London Luton Airport (LTN) had 52 flights (25%) canceled and 35 flights (17%) delayed
So everything went smoothly in the morning, and then operations suddenly fell off a cliff.
Planes were stranded on Heathrow taxiways for hours
Here’s what I perhaps find the wildest about this terrible operational day for airlines in the UK. Heathrow is the UK’s busiest airport, and it’s typically close to capacity, so there’s not much extra space. Accommodating arriving planes requires planes to depart as planned.
Unfortunately things got really bad at Heathrow, as many planes still landed after the failure started, while all gates were occupied. Some flights (yes, with passengers onboard!) ended up spending five or more hours on the taxiway, without access to a gate.
For example, British Airways flight BA272 from San Diego (SAN) landed at 2:07PM, and got a gate at 7:42PM, 5hr35min later. YIKES.
British Airways flight BA122 from Doha (DOH) landed at 2:19PM, and got a gate at 7:48PM, 5hr29min later. Bleh.
British Airways flight BA242 from Mexico City (MEX) landed at 2:46PM, and got a gate at 7:49PM, 5hr3min later. Ouch.
And those are just a few examples, as there are many more! I get that the logistics here are complicated, but you’d expect airports to do better, by bringing out air stairs, and sending people in buses to the terminal. But I also get that at some point the airport taxiways turn into an impossible jigsaw puzzle.
I can’t even imagine how unpleasant this was for all people onboard, including the passengers and crew.
Bottom line
It was a very messy day for aviation in the UK, as the country’s air traffic control system had a glitch that basically shut down the skies for around four hours. Even when the issues were resolved, it’s not as easy as just resuming operations as normal, since you have planes and crews completely out of place. Hundreds of flights ended up being canceled or delayed, and British Airways just shut down its entire short haul operation for the rest of the day.
I think the most shocking aspect of this is what happened at Heathrow, where planes ended up being stuck on taxiways for hours on end. Several planes had to wait over five hours for a gate, with nowhere to go. That has to be close to being some sort of a record.
Was anyone caught up in this UK ATC meltdown?
I was on SQ308, SIN-LHR. Luckily in J. A380. Due LHR 3:45pm.
We approached LHR, held for about 7-8 laps, then turned our noses against FRA with an ATC outage PA from the Captain.
Ready for approach, turned again towards CDG and landed there as the Captain explained FRA couldn’t take us. Landed 6:30ish.
Held onboard while ground crew worked out logistics. Other wide bodies were also diverted.
Ground staff advised...
I was on SQ308, SIN-LHR. Luckily in J. A380. Due LHR 3:45pm.
We approached LHR, held for about 7-8 laps, then turned our noses against FRA with an ATC outage PA from the Captain.
Ready for approach, turned again towards CDG and landed there as the Captain explained FRA couldn’t take us. Landed 6:30ish.
Held onboard while ground crew worked out logistics. Other wide bodies were also diverted.
Ground staff advised minimal/no accomm or onward flights. Chartered coaches to take us to London (!). Other airlines ended up doing the same (QR, EY).
My coach left CDG 11pm. Calais border control 2:30am-ish. Cleared for the bus onto the Channel tunnel train 4:16am departure. Arrived London Victoria Stn 6am-ish local. Yawn!
(Onto LHR by separate bus as I had originally a further transfer from there which was also cancelled, reacommodated the same evening of our arrival). Thank heavens for day room availability at LHR hotels. Best hundred quid I’ve spent for a while!
Was stuck in LHR waiting to board BA099. Saw other BA flights to near by airports such as EWR/JFK get cancelled but luckily my flight to YYZ was still good to go, just very much delayed. Thankful to be home and that I got to wait out the delay in the lounge instead of on the tarmac.
Phew! Glad you actually made it! Canada deserves the 'win' these days.
Boarded at 12:45p for a 1:20p flight. Never left the gate and they did not let us deplane until 8:30p because T5 immigration was at capacity. Until 5p we thought we would eventually leave and that’s why they kept us onboard. Very messy day but kudos to the BA crew who kept us hydrated and always in the loop on what they were being told.
I've waited 90 minutes for a gate during a normal day at LHR. Assigned a remote stand and no available buses.
Reminds me of the flash snow of 2004, which as luck would have it, was the day I was flying a crazy studentuniverse ticket itinerary with a stop through LHR. Must have been 6 hrs sitting on the tarmac waiting for deicing. Back in economy those days but lucky enough to have a row to myself so could have been worse. Can’t imagine it with a full plane.
That's tough. Glad you made it through alright ~22 years ago. While out of your personal control (and likely also out of even the airlines' control), I'd argue there's a slight of a difference between a severe weather event (blizzard) and an ATC failure (if that's what this was). We cannot control the weather, but we (through our governments, etc.) can properly staff and maintain air traffic control. Hopefully we learn more after this so...
That's tough. Glad you made it through alright ~22 years ago. While out of your personal control (and likely also out of even the airlines' control), I'd argue there's a slight of a difference between a severe weather event (blizzard) and an ATC failure (if that's what this was). We cannot control the weather, but we (through our governments, etc.) can properly staff and maintain air traffic control. Hopefully we learn more after this so that it doesn't happen again (in the UK or elsewhere).
I am speculating the EU261 will not apply, as this is force majeur. Poor pax scrambling for connecting flights - my guess it tomorrow will not be pleasant at LHR.
The terminals were saturated, therefore bringing stairs to an aircraft and deplaning passengers wasn’t an option. Nor would it be possible to offload any bags.
FLLFLYER, depending on the routing/itinerary, it could be covered by EU or UK 261 regulations. And, even if compensation is not eligible due to the defense of 'extraordinary circumstances' (not yet determined, burden on the carrier to prove), regardless, airlines still owe a duty of care to affected passengers, including communications, rebooking (even on competitors), potentially overnight accommodations, meals, and other reimbursements (again, it all 'depends'). Unfortunately, in the USA, we have limited-to-none of these...
FLLFLYER, depending on the routing/itinerary, it could be covered by EU or UK 261 regulations. And, even if compensation is not eligible due to the defense of 'extraordinary circumstances' (not yet determined, burden on the carrier to prove), regardless, airlines still owe a duty of care to affected passengers, including communications, rebooking (even on competitors), potentially overnight accommodations, meals, and other reimbursements (again, it all 'depends'). Unfortunately, in the USA, we have limited-to-none of these passenger protections. We should, but we don't, for now.
Totally love planes and even airports in almost all shapes, totally hate spending a single second on a plane or at the airport that's outside of schedule/plan, would go bonkers if i had to sit on a BA plane for 30 mins after at a longhaul. That said, i feel like we gotta give BA a break, it wasn't their call to keep the plane on a taxiway for 5 hours. We're also talking about...
Totally love planes and even airports in almost all shapes, totally hate spending a single second on a plane or at the airport that's outside of schedule/plan, would go bonkers if i had to sit on a BA plane for 30 mins after at a longhaul. That said, i feel like we gotta give BA a break, it wasn't their call to keep the plane on a taxiway for 5 hours. We're also talking about the fully awesome yet fully sht Heathrow, one of most space constrained airports in the world. It was a ground stop, ain't much you can do till the other plane at the gate is allowed to vacate the gate - textbook definition of outside of their control.
There ought to be some passenger protection law worldwide that doesn't allow airlines to hold passengers hostage on a plane for hours on end. Or some sort of backup plan when all else fails. You got the elderly, children and others just stuck on a plane.
Speaking my language, sir.
Technically, in US, already we have 3 hours for domestic, 4 hours for international, before must deplane, but can exceed if verified safety, security, etc. Updates every 30 minutes; food and water within 2 hours; not perfect, but better than nothing.
In UK, rule 261 includes duty of care (food, water, communication, etc.), and potentially compensation if it’s the airline’s fault; we really could use that in the US. Maybe someday.
I don't care about the compensation. I care about being stuck on a hot plane for hours against my will.
It will never happen in the US. Corporations are too greedy and have the ear of Congress, so nothing like this will pass out of Committee
@retiredatlatc Well, not with that attitude...
Recall, the US DOT already has broad authority under 'unfair and deceptive practices' to write federal compensation rules directly, bypassing Congress (and the prior administration was already heading down that road). Now, of course, this current administration (and the Court) is in-the-bag for corporations, so, that probably won't happen soon enough. Yet, why stop advocating for it in the meantime...
Sure, in this era, corporate lobbies have...
@retiredatlatc Well, not with that attitude...
Recall, the US DOT already has broad authority under 'unfair and deceptive practices' to write federal compensation rules directly, bypassing Congress (and the prior administration was already heading down that road). Now, of course, this current administration (and the Court) is in-the-bag for corporations, so, that probably won't happen soon enough. Yet, why stop advocating for it in the meantime...
Sure, in this era, corporate lobbies have had an outsized grip on our government, often acting against most peoples' interests in favor of those special interests. However, corporate greed often hits a breaking point where operational chaos and public blowback force regulatory intervention anyway. (Starting to see that with data centers, haven't you noticed?)
Plus, let's not pretend US airlines are allergic to these rules: every major US carrier already complies with EU/UK 261 on return flights from Europe, and Canada's APPR for flights touching the north. They already have the software, the compliance tracks, and the legal teams set up to hand out cash compensation globally—they just choose not to do it domestically because our regulators let them get away with it.
I suspect, during the next economic downturn (which we're kind of already in, thanks to the persistent inflation, self-inflicted tariffs, wars, and other failed policies), airlines will inevitably hold their hands out for another bailout—just like they did during the pandemic, the Great Recession, and post-9/11—and ideally a better Congress will finally stipulate mandatory compensation rules as a non-negotiable condition. So, I wouldn't lose hope altogether.
And they wouldn’t have much food / snacks left on board as it was the end of the flight. As terminals were saturated it wasn’t possible for passengers to leave the aircraft. This also applies in the USA for tarmac delays when weather, security etc is beyond and airlines’ control.
Probably just try to sleep, read a book or watch a film.
Ah, Icarus, flying to close to the sun again, I see. There is still a major difference between how the EU and UK versus the US handles this. Beyond the tarmac delay—even if caused by weather or ATC—if you miss your connection or get stranded overnight, EU and UK rules still require a strict duty of care (rebooking, overnight accommodation, meals, and reimbursements if necessary). In the US, you likely get nothing more than a...
Ah, Icarus, flying to close to the sun again, I see. There is still a major difference between how the EU and UK versus the US handles this. Beyond the tarmac delay—even if caused by weather or ATC—if you miss your connection or get stranded overnight, EU and UK rules still require a strict duty of care (rebooking, overnight accommodation, meals, and reimbursements if necessary). In the US, you likely get nothing more than a partial refund and no duty of care, especially after recent rollbacks by the DOT. Personally, I think passengers in the US deserve far better than this.
And you got force majeure on top of everything.
They're holding anyone hostage. Did you even read Ben's article? You're being hysterical.
Five hours is a perfectly normal amount of time to be on a taxiway at Newark
*ORD
@1990_ or FRA with the endless busses
In the video , all the people waiting in line were waiting for the one restroom . In the meantime , Heathrow has decided to build more gates and restrooms . Progress .
Criticise Heathrow all you want for many things, but on a normal day it actually has really amazingly good and plentiful toilet facilities that are constantly kept clean by hard-working cleaning staff.
Speaking of LHR, are you still not going to investigate the issue with Alaska losing access to certain partner routes like JFK to LHR?
JFK to LHR and other specific routes have been completely blocked for points bookings on Alaska. Zero awards of any type from any partner for the full year, despite seeing the same partners like AA or BA on other US to LHR routes, and no alternative routes like Aer Lingus or...
Speaking of LHR, are you still not going to investigate the issue with Alaska losing access to certain partner routes like JFK to LHR?
JFK to LHR and other specific routes have been completely blocked for points bookings on Alaska. Zero awards of any type from any partner for the full year, despite seeing the same partners like AA or BA on other US to LHR routes, and no alternative routes like Aer Lingus or Iberia being offered. The segment itself is still showing availability via connections like BOS-JFK-LHR, etc.
Same thing has happened to the SFO to TPE route with zero awards on this route of any partner, while Starlux awards are available on other routes or LAX-SFO-TPE. No Cathay/JAL or anyone else either.
So some routes are being systemically blocked off on Alaska. This is the kind of journalism and investigation you would be interested in, in the past. Especially when you are actively switching over to Alaska for status now.
For real, Alaska’s been playing dirty. Used to be one of the best in the business for partner awards, but availability lately has been lacking. Kudos to anyone (like @Samar) who snagged one of those JX deals earlier this summer!
AS is becoming the skypesos real quick.
Dont get me started about the botched roll out of the new Atmos....sheesh
Alaska has a stuck 789 in addition to the mx on in fco which has a brake problem (wondering if it’s related to the Vietnam Airlines nmincident)
If so, that’d be bad-news-bears for Boeing, no doubt. (So, dear whistleblowers, please stay away from windows and stairs, k thanx.)
i cant wait for the report from the germans about it....look at captain steeve youtube about it.....
AS 100 from last night sat for over 5 hours waiting for a gate....ouch
Well done, @isaacc, for pointing this incident out on the Daily Discussion thread!
This is on the heels of yet another Heathrow baggage system failure a few days ago - second one of the summer. (And I'm still waiting on my bag).
@peter_ Yikes, they got you! *smh*
Peter - Be patient and keep waiting for your bag .
Indeed. Zen and the art of patience with BA.
Patience finally paid off... took them 9 days... but got the bag.
Why are there two figures for LGW?
@ Espresso_Frankfurt -- Because I've had a long day and it's close to my bedtime. :p Fixed, thank you!
No worries, I wondered if it was me for a second too.
We flew BA949 from Split to Heathrow. Just before landing the pilot informed us that Heathrow was closed and we were being diverted to Gatwick.
We waited in the plane for about four hours before BA could secure buses to transport us to the terminal.
Many people had connections canceled and were advised to handle their own arrangements and submit receipts for reimbursement.
On the upside, we were told the airport was...
We flew BA949 from Split to Heathrow. Just before landing the pilot informed us that Heathrow was closed and we were being diverted to Gatwick.
We waited in the plane for about four hours before BA could secure buses to transport us to the terminal.
Many people had connections canceled and were advised to handle their own arrangements and submit receipts for reimbursement.
On the upside, we were told the airport was a zoo...it was, but we were through immigration within five minutes. Really surprising, but we were grateful.