Sorry this is not correct . Delta did put out there own money for items they wanted to include. Delta agreed to the plans then later put out cash for certain things they wanted. Not insignificant money either.
Additionally for cost overruns you do realize they ended up building alot more than they started right? They chose to go that route to get more gates as they decided it was cheaper and given SLC growth rate would be too small too soon. The airport was sitting on a ton of cash their plans have been extremely conservative . It will still be a very low cost airport to operate from and even more on time (if that's even possible).
Plus delta just extended and is on a very long term lease at SLC. They are going nowhere, and the new terminals looks awesome and are super conservative financially
You're misinformed. NW oversaw the design and construction of DTW, but did not spend its own money on the project; instead, it was financed similarly to SLC -- largely debt that NW was mostly responsible for paying for through various user fees. Likewise, DL has influenced the design of SLC - as it should - but has not spent its own money on the project. SLC recently raised the estimate of the airport by $500M and claimed 'it's a good thing, because it's mostly upon requests DL made, such as the world's largest and best SkyClub and an increase in size in the FIS.' For half a billion dollars, it's going to be some SkyClub! In reality, construction trade publications blame the $500M increase largely on an unfavorable labor market (re: SLC is paying a lot more for labor and contractors than it had anticipated) and increased costs (specifically the Trump Tariffs) on raw materials. Similar dynamics considerably swelled the expected cost of the new MCI airport.
Secondly, the project started at $1.8B and is now at $4.1B. When SLC announced it was going forward with additional construction, it claimed that cost overruns plus
the additional construction costs added about $800M to the project. Ultimately, the final project will certainly cost more than $4.1B, so the added market costs (labor and raw materials) will be somewhere between $1.5B and $2B. SLC initially intended to fund the airport with just 20% debt but that number's now about two-thirds. The cost of the new airport will unquestionably increase and SLC was never going to meet the traffic levels it forecasted, let alone after what's happening now. If the project finishes on budget, it'll make SLC about $1B more in debt than DTW and MSP -- when it begins to service the full debt, its CPE will far surpass both.
Now, I don't think - nor did I imply - that DL will de-hub SLC. I merely pointed out facts -- you simply can't gauge the future of DL based upon improvement projects made to individual airports, e.g. SLC's new airport does not make it immune to cuts. DTW's a great example of that -- it houses a smaller hub for DL today than the old terminal did for NW. Instead, what I said was that DL agreed to a $1.8B project that was to be financed by $600M in debt, by an airport that had zero debt. Instead, it's getting a project that will likely balloon over $4.5B and financed by close to $3.5B in debt; had they known this, I doubt they would've agreed to that scope of rebuild. To save face with the public, airlines generally keep their mouths shut when it comes to whining about costs that improve the passenger experience. There's plenty of examples -- WN publicly supported the MCI project, but reportedly opposed the scope of it privately; NK publicly supported the DTW North Terminal Project, but we now know they privately opposed it, etc.
And no, a project that ballooned by $1.5B - $2B (simply labor and material cost, and not including project additions) isn't run by a "super conservative" airport. Some overage was unexpected (Trump Tariffs), but they missed the mark well.
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As I posted two weeks ago, the low-hanging fruit in terms of flight cuts has histrionically been very early, very late and redeye departures, plus long, thin flights that overfly other hubs. The first flights DL cut were... very early, very late and redeye departures. Most of these will be gone indefinitely... as will the long, thin flights that overfly other hubs. And SLC's seen more growth in this arena in recent years, than any other hub. There's simply now way CLE-SLC, CMH-SLC, etc. will operate during a downturn.