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At the end of June this year, Michael O’Leary from Ryanair was his usual self at the Paris Airshow. He let a few jibes fly at almost everyone. He also signed an order with Boeing for new aircraft, worth around $1.5 billion. Plans for future aircraft purchase were mentioned too and O’Leary compared two possible aircraft – one from Boeing and one from Airbus. While he suggested both were similar aircraft, the Boeing has 9 more seats and he said ‘that’s worth a million bucks’. When I read this , I thought is this just another quip or does we know his numbers well?

So, here are our calculations:

9 seats at average revenue of €70 = €630

Assume four flights per day per aircraft, so 630 x 4 =€2,520.

Finally, assume 360 flying days per year, this gives 360 x €2,520 = €907,200.

Let’s not argue over the rounding, and maybe my sums and assumptions are not correct. But a round €1 million per aircraft per annum adds up to a lot of money. So although O’Leary’s rule of thumb may seem like a quip, it seems to be quite a good rough measure. He is an accountant after all!