Irrelevant for the context of this discussion, as SQ (and some other airlines) run their own dedicated cargo operations with dedicated cargo birds and other equipment, which of course increases revenue but also comes with its own set of costs. Given the original question was trying to address the importance of belly cargo to passenger airline operations, bringing this figure up makes no sense.
I think SQ disagrees with you.
If you go to page 49 in SIA's financial report, you will see that the bellyhold cargo revenue was $975m, and the SQ passenger revenue was $9,816m. So the revenue of bellyhold cargo ALONE was 10% of total passenger reveune. That's significant. Bellyhold cargo revenue accounts for 44% of total cargo revenue (page 54)
I don’t know about you, but that amount is pretty significant.
SQ financial report: https://www.singaporeair.com/saar5/pdf/ ... rt1718.pdf
Now, let's talk about US3 cargo revenue figures.
The vast majority of US3 revenue comes from domestic flights on A320s/737s/MD-80s. Those frames cannot haul that much of cargo and passengers at the same time. A320 for example has a maximum payload of 18t, and if you get 157 pax onboard, that leaves only around 2t for possible cargo, unlike what widebodies can offer to SQ for example.
DL in Q4 2017:
domestic flights revenue was 72% of total passenger revenue ($6,189m).
International flight revenue was $2,312m, and cargo revenue was $200m.
So Cargo revenue was actually 9% of all of DL's international flights revenue. (similar to SQ’s figures, since SQ has no narrobody frames)
So when you make a more apple to apple comparison between DL and SQ, you will find that both of them achieve a bellyhold cargo revenue that is 9-10% of total international flights revenue.
Yet somebody was trying to convince us that Delta demanded to fly 25T of cargo across its Pacific network on a daily basis...?
This is a factual claim. No one has to convince anyone of that, they either carry that amount of cargo on a daily basis, or they don't. All what we need is an evidence that proves that.
Even if it does carry that amount on a daily basis, such an amount of revenue will be diluted in the large revenue DL achieves in its domestic network. It will still be a fraction of the gigantic overall revenue they can bring in.