Chasing a million frequent flyer miles across six continents sounds glamorous until a passport in a London drawer nearly ends the whole thing. That's what happened to one blogger midway through a Six Continents Challenge, where every flight must be credited to a single frequent flyer account and retroactive claims don't count.

The plan was tidy: fly Cairo to Istanbul, then Turkish Airlines onward to Denver, ticking off North America before returning to Cairo for the Africa segment. Things unravelled at the Istanbul gate, where staff couldn't find a valid ESTA for the US. The traveller did have one — it was simply attached to an older passport, swapped out because it had run out of blank pages (blame Brexit-era EU entry stamps), and the new passport was sitting in a hotel drawer back in London.

Denied boarding on a promotional 'no changes' ticket booked through an online agency is normally a disaster. Here it meant potentially losing the return flight to Cairo too, plus a bag left with the Le Méridien airport hotel in Cairo for safekeeping. The new ESTA was approved 30 minutes after the Denver flight departed — far too late to courier the old passport across.

The rescue: a $500 rebooking onto Turkish's next-day Chicago flight, then a separate hop to Denver on American for just 13,000 Avios. Expensive, but compared to losing the whole itinerary, close to a get-out-of-jail-free card. A second ESTA drama at check-in in Cairo earlier in the day had also resolved itself once the desk found the booking.

The trip wasn't short on smaller adventures either. A forgotten frequent flyer number on the Cairo-Istanbul leg nearly cost the miles until agents reissued the Denver boarding pass with it attached — a useful reminder for anyone in a mileage-run style challenge. In Chicago, a six-hour layover turned into an expedition to buy a new phone (and later a laptop in Denver, which survived a tumble from an overhead bin thanks to a kind stranger's warning). Oneworld Sapphire status, matched via Royal Jordanian, got lounge access and a free checked bag — though one American agent refused help because Sapphire wasn't top-tier, a sign of how status-heavy US routes have become.

Denver itself got a thumbs-up as a pleasant city, even if food poisoning struck before the return leg — bad enough that the famously good Turkish business class catering went untouched. Cairo's Le Méridien airport hotel, meanwhile, comes recommended as a good-value Marriott points redemption.

Why should a regular traveller care? Beyond the entertainment value, there are real lessons: always check which passport your ESTA is linked to, never assume an OTA's restrictive ticket can be salvaged, add your loyalty number at booking (not at the gate), and expect the odd curveball — broken glasses, $0 bag tags that won't print, a laptop in freefall. Mileage challenges are high-stakes, but even ordinary holidays can benefit from that extra layer of double-checking.