Heathrow Blackout: Fire Cuts Power, Shuts Airport, Flights Divert As 100,000+ Stranded Worldwide

London Heathrow Airport closed when a fire broke out at an electrical substation that feeds it with power. We know that the airport is closed for the entire day Friday and hopefully will re-open on Saturday. I was supposed to connect through Heathrow today but thankfully had switched to an Air France option back to the States instead.

Approximately 1,300 arrivals and departures were cancelled with flights enroute to Heathrow turned back around or diverting elsewhere because the airport couldn’t accept them. According to data from aviation analytics company Cirium, as many as 145,000 passengers could be affected based on scheduled seats and flights (though not every flight would have been full)

There were 669 flights scheduled to depart on March 21. Bear in mind that a March 22 re-opening remains a guess at this point. Here’s a sampling from Cirium:

Airline Flight Aircraft Aircraft Type Route Diverted To Departure Date
American Airlines AA 20 N727AN 77W DFW -> LHR BGR 20-Mar-25
AA 38 N719AN 77W MIA -> LHR MIA 20-Mar-25
AA 80 N753AN 772 DFW -> LHR DFW 20-Mar-25
AA 86 N827AN 789 ORD -> LHR ORD 20-Mar-25
AA 100 N790AN 772 JFK -> LHR JFK 20-Mar-25
AA 106 N723AN 77W JFK -> LHR JFK 20-Mar-25
AA 108 N786AN 772 BOS -> LHR BOS 20-Mar-25
AA 134 N726AN 77W LAX -> LHR LAX 20-Mar-25
AA 730 N735AT 77W CLT -> LHR CLT 20-Mar-25
AA 732 N768AA 772 CLT -> LHR CLT 20-Mar-25
Air Canada AC 854 C-FIUL 77W YYZ -> LHR YYR 20-Mar-25
Air India AI 111 VT-JRF 359 DEL -> LHR VIE 20-Mar-25
AI 129 VT-AEN 77W BOM -> LHR BOM 21-Mar-25
JetBlue B6 1620 N4083J 32Q BOS -> LHR YYR 20-Mar-25
British Airways BA 56 G-XLEL 388 JNB -> LHR LGW 20-Mar-25
BA 58 G-YMMU 777 CPT -> LHR LGW 20-Mar-25
BA 74 G-ZBLI 781 LOS -> LHR LGW 20-Mar-25
BA 190 G-XWBS 351 AUS -> LHR IAD 20-Mar-25
BA 262 G-YMMP 77W RUH -> LHR AMS 21-Mar-25
BA 284 G-XLEE 388 SFO -> LHR SFO 20-Mar-25
Delta Air Lines DL 16 N852NW 332 DTW -> LHR AMS 20-Mar-25
DL 30 N845MH 764 ATL -> LHR AMS 20-Mar-25
JAL JL 41 JA836J 788 HND -> LHR HEL 21-Mar-25
JL 43 JA06WJ 351 HND -> LHR HND 21-Mar-25
Qantas QF 1 VH-OQA 388 SIN -> LHR CDG 20-Mar-25
QF 9 VH-ZNC 789 PER -> LHR CDG 20-Mar-25
United Airlines UA 5 N228UA 777 IAH -> LHR IAH 20-Mar-25
UA 14 N672UA 763 EWR -> LHR EWR 20-Mar-25
UA 16 N663UA 763 EWR -> LHR EWR 20-Mar-25
UA 27 N12012 789 DEN -> LHR DEN 20-Mar-25
UA 904 N686UA 763 EWR -> LHR EWR 20-Mar-25
UA 918 N77012 777 IAD -> LHR IAD 20-Mar-25
UA 920 N675UA 763 ORD -> LHR ORD 20-Mar-25
UA 930 N793UA 777 SFO -> LHR SFO 20-Mar-25
Virgin Atlantic VS 56 G-VEYR 339 IAD -> LHR IAD 20-Mar-25
VS 166 G-VWHO 789 MBJ -> LHR MBJ 20-Mar-25

Airline losses from the closure of Heathrow will be staggering. British Airways losses flying just between London and New York are likely in the $30 to $50 million range for the day. While some savings would be captured from not burning fuel, most expenses like labor and aircraft are fully baked in. Airlines will have expenses related to passenger dislocation as well. And, of course, passengers will have their own expenses. Liability and insurance between airlines, the airport, and power company are likely to take time to sort out.

About Gary Leff

Gary Leff is one of the foremost experts in the field of miles, points, and frequent business travel - a topic he has covered since 2002. Co-founder of frequent flyer community InsideFlyer.com, emcee of the Freddie Awards, and named one of the "World's Top Travel Experts" by Conde' Nast Traveler (2010-Present) Gary has been a guest on most major news media, profiled in several top print publications, and published broadly on the topic of consumer loyalty. More About Gary »

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Comments

  1. How can a modern airport like LHR have no back up? And how much are we paying APD again??

  2. Surprised that LHR does not have its own substation for security issues alone, rather than relying on a public utility. The cost of an outage is staggering compared to a residence.

  3. Get ready for all the stories of being stuck there now or those who have experienced travel disruptions at LHR in the last 25 years.

  4. Hope everyone is ok and that they fix this as soon as possible.

    @Journeying John — Waiting for a full investigation, but subconsciously whenever something like this happens I, too, suspect sabotage, and recognize that we’ve been in a hybrid war against Putin and his enablers for decades now. Whether it’s pipelines, rail infrastructure, electric, or this, it all can be connected, and plausible deniability is another tactic as well. Now, where are the Putin apologists, like Mike P, who had ‘no opinion’ about the Russians after that Azerbaijani airplane was ‘shot’ at earlier this year. Hmm. The thing is, we can have different opinions on domestic politics, but we used to all stay loyal to our own side—not anymore, in the USA, a third of our country now sides with Putin, and the official stance of our leaders seem to have betrayed our once friends and allies instead. It’s so messed up.

  5. Likewise, it doesn’t have to be foreign sabotage. Let’s say, again, speculating, because why not, it’s VFTW, not the AP, it could have been… ‘Just Stop Oil’ (they are UK based), or ‘Green Peace’ (or any activists) trying to halt what they consider the ‘climate crime’ of flying aircraft. Ok, I understand their concern, but that’s not ‘cool’ or ‘legal,’ either. If so, prosecute, and remind folks to use other means to peacefully protest for whatever causes they support.

    And before anyone dares to call me a ‘humorless scold,’ I crack plenty of jokes on here, and absolutely enjoy cultural references and banter, so feel free to engage on any of that any time with me at least.

    Realistically, I would not be surprised if this turned out to simply be a maintenance failure–and if so, they should try to learn from this, get folks to do their jobs even better, don’t let it happen again, c’mon.

  6. an investigation should be done but basic equipment failure can happen…. it just happens to have enormous consequences in this case.

    the cost to UK heavy airlines will be heavy.

  7. @Tim Dunn, that includes Delta, which owns 49% of VS, the UK’s second biggest long haul airline.

  8. Everybody wants to have backup systems that come on line when something like this happens so everything can continue without major disruption but nobody wants to pay for them. Of course it is not just the initial capital layout for equipment but also installation, maintenance and scheduled replacement of old systems. Again, nobody wants to pay for the backup systems so some businesses go light on backup systems. More or less whistling past the graveyard. Some manufacturing businesses have very solid backup systems because the cost is justified by the losses incurred by a major outage, which could reach existential levels. I doubt that this situation is an existential threat to LHR. It will be messy, though.

  9. of course, Lady.
    BA and VS both were able to divert a couple of flights to the UK – England or Scotland – so some people could be closer to home than those whose flights returned to the US or Canada or were diverted to continental Europe.

    It will take days for the backlog to clear out. People that were simply connecting through LHR will undoubtedly be moved to other airlines which could be a benefit for DL and UA and their partners.

  10. Wow, what chaos – glad at least everyone is physically okay from what I’ve heard. Not looking forward to hearing the financial reprecussions from this, Heathrow of all places – yikes.

    Also glad your plans worked out the way they did, Gary — safe travels back!

  11. BA is over half the flights at LHR, (SkyNews and Google.) VS is the second biggest user of LHR. I’ve used either airline, with mixed experience, even before OW and SkyTeam loyalty adventures. Last year I started using BA A380 and First Wing with OW Emerald status, and that was alright, and have bookings to do so, again, later this 2025. I’ve yet to do VS through LHR with my SkyTeam Elite Plus status, either Delta Medallion Gold or ITA Executive Club Black, or maybe Virgin Airways Gold, should I decide to get serious about Virgin AIrways and its sweet status match with Virgin Voyages.

    Anyway, I really would rather fly by way of CDG, AMS, FRA, or even ZRH, or just avoid Uk & Europe altogether and fly an ME3, given my options as a leisure traveler. Travel concepts used to dictate, “Air France, take a chance,” but, now I feel that way about BA, and I do enjoy AF as a top five airline. I’ll see how 2025 LHR handles this shutdown, before deciding if I want to avoid LHR for my 2026 bookings.

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