Like you, probably, I invariably try to spend the least I can. But this week I’ve been looking at some of the most expensive flying on the planet. Take a trip in First Class to the far side of the world (frankly, who wouldn’t want to as winter takes hold in the northern hemisphere?). Qantas will take you from London to Auckland for £4,636 in its award-winning First Class cabins, with stopovers in Dubai and Sydney.

Coming back via Los Angeles on Air New Zealand, the fare is a paltry £3,235 – though you’ll be slumming it on a business class lie-flat bed. So for 23,000 miles of luxury travel around the world, you won’t even reach £8,000.

To put that fare in perspective, it represents six months’ work (assuming a 40-hour week) at the National Living Wage. But it is a less than half the £17,200 that a leading travel-and-finance blogger, Daniel Gillaspia, reckoned was the “actual cost” in air fares per person of the trip that he and a partner took around the world from the US.

The couple flew from Los Angeles to Tokyo to Singapore to Johannesburg to Abu Dhabi and finally to New York in a combination of first and business class for a pittance – plus hundreds of thousands of frequent-flyer points. As you can tell from his blog, they stayed in lots of swanky places, such as the InterContinental Tokyo Bay. The stay cost the couple nothing more than IHG points, but the “actual price” was $1,000 for the two nights.

’Tis the season when retailers are traditionally tempted to play the “previously £999” card to emphasise how much you are supposed to be saving on a product that was never actually sold for that price. In fact I did eventually find a room rate at the InterContinental Tokyo Bay, which reaches $1,000 for two nights; it’s rack rate for a top-of-the-range, non-pre-booked deluxe corner room. Now that’s the same room as Mr Gillaspia stayed in but, as he explains, he was upgraded to it. And there’s a wide range of cheaper deals on this room. So “actual price” may be something that hardly anyone ever pays.

A bit of background. Mr Gillaspia vowed to go around the world “spending less than 1 per cent of the amount of money needed to pull off this trip with cash by using miles and points earned from credit cards".

In the US there is an entire industry in applying for several credit cards in order to score frequent-flyer points. As Mr Gillaspia says: “Miles and points don’t just appear out of thin air. It takes a fair amount of work to learn how to earn and redeem them in efficient ways and having access to many credit cards is definitely not something that’s for everyone. However, when you are able to properly sign-up and manage many credit cards, the return in value for your time and effort can be astronomical, as seen by this trip.”

Which begs the question: how do you define “return in value”? Personally, I’d rather stick to economy even on the 14-hour-plus flight from Abu Dhabi to New York than spend days on end managing multiple credit cards.

Indeed, I’m so inattentive about cunning ways to earn Avios (the BA/Iberia currency) that I simply buy the frequent-flyer points. Every year the British Airways Executive Club sends out an email selling Avios, and every year I order the maximum (45,500 for £575). Then, as I wrote here, I redeem them on short-notice European trips or one-way long-haul flights. And the travel writer David Whitley recommends combining simplicity with the odd bit of luxury: “Get one points-earning card, use it to buy what you'd be buying anyway, then enjoy an upgrade every two or three years.”