A lack of effective resiliency and redundancy at all of the major US airlines makes air travel feel like a bit of a coin toss in terms of whether you can expect to get where you need to go on any given day. In the past 3 years each of the big 5 have had multiple full ground stops due to multi-hour/multi-day system failures. They get heavy coverage during and in the immediate wake but consumers and the market tend to forget relatively quickly. As such there just isn't enough consumer or regulatory pressure on these airlines to invest the actual resources required to build more effective fault tolerance into their operations. I'm afraid this is just going to be part of life in US air travel for the foreseeable future.
A small excerpt of the memorable ones or where I was personally affected, but there have been many more over the period:
Holiday 2022 Southwest system collapse
July 2024 Delta 5 day outage
August 2025 United weight and balance outage
June 2025 American outage
October 2025 AWS outage impacting AS, AA, UA, DL
What amazes me is watching Delta specifically on several occasions their crew management system seems to be a huge weakness. Once it goes down it seems to heavily rely on crews calling in to note where they are and other status details.
It's like once it goes down all state is lost and for a long time, often days, crews describe having to call in and wait while they figure it out who does what / goes where.
I don't like to oversimplify, but it really seems like a solvable problem ...
A small excerpt of the memorable ones or where I was personally affected, but there have been many more over the period:
Holiday 2022 Southwest system collapse July 2024 Delta 5 day outage August 2025 United weight and balance outage June 2025 American outage October 2025 AWS outage impacting AS, AA, UA, DL