travel
The second-destination trick: how adding a city you'll never see makes flying cheaper
Airline fares are priced by competition, not distance — which produces the strange result that flying further can cost less. Here's how the trick works, and why I treat it as a curiosity rather than a strategy.
Let me disarm the headline before it does any damage. I am not about to hand you a guaranteed method for halving your travel budget, and anyone who promises that is usually selling a newsletter. What I can offer is an explanation of one of the stranger corners of airline pricing — the fact that a ticket from A to C, changing planes at B, is sometimes cheaper than a ticket from A to B on its own — and an honest account of what happens when people try to exploit it. The trick is real. The catches are also real, and they are the part most articles skip.
The fare that makes no sense until it does
The intuition everyone starts with is that flights are priced like taxis: more distance, more money. They are not. A flight is priced according to what the market between two specific cities will bear, and that market is shaped almost entirely by competition. If three airlines fight over a route, fares on that route are thin. If one airline owns a fortress hub, fares to and from that hub are fat, because the airline can charge for the convenience of a nonstop and nobody can undercut it.
Now imagine the fat-hub airline wants to compete on a longer route that happens to pass through its hub. To win passengers on that longer route — where it faces rivals — it has to price the whole journey competitively. The result is a through-fare, A to C via B, that undercuts its own nonstop fare from A to B. The connecting passenger is subsidised by competition; the nonstop passenger pays for monopoly. Same aircraft, same seat, two prices.
Enter the hidden city
Hidden-city ticketing — sometimes called throwaway ticketing — is simply the act of noticing this and buying the longer ticket while intending to get off at the connection. You want A to B; you book A to B to C; you walk out of the airport at B and let the final leg fly without you. The city of C, which you will never see, exists on your itinerary purely as a pricing device. There are websites built around surfacing these fares, and frequent flyers have traded them quietly for decades. Nothing about it is secret; airlines know precisely how it works, because they built the machine that makes it possible.
It is worth pausing on that. The airline is not being cheated out of a cost — you are consuming less flying than you paid for. What you are doing is refusing to pay the monopoly premium the airline attached to your actual route. Whether that is cunning or discourteous depends rather on where you sit, and the airlines, unsurprisingly, sit firmly on the side of discourteous.
The catches, in full and without varnish
Here is the section that matters, because the trick fails in predictable ways and every one of them is avoidable only by knowing about it in advance.
Hand luggage only. Your checked bag is tagged to the final destination on the ticket, not to wherever you plan to disembark. Check a bag and it will cheerfully continue to C while you stand at B watching an empty carousel. And even a carry-on is not entirely safe — on a full flight, gate staff may insist on checking it through, and a check-in desk can reroute bags in ways you don't control. Travel light or don't travel this way.
Never skip anything but the last leg. The moment you miss a segment, the airline cancels every remaining segment on the booking. Skip the first leg and the whole ticket evaporates. Book this on a return and abandon the outbound connection, and your flight home no longer exists. The only leg you can safely walk away from is the final one, on a one-way ticket, at the very end.
The terms and conditions frown on it. Most airlines' conditions of carriage explicitly prohibit booking a fare you don't intend to fly in full. Enforcement against ordinary passengers is rare, but airlines have pursued repeat offenders, invoiced them for fare differences, and closed loyalty accounts. Which brings me to —
Leave your frequent-flyer number off the booking. Attaching your loyalty account to a hidden-city itinerary is handing the airline a signed confession with your name and address on it. The miles are not worth it. And relatedly, don't make a habit of this on one airline: a single anomaly is noise, a pattern is a file.
Life happens. Irregular operations can reroute you through a different hub entirely — the airline owes you carriage to C, not to your secretly preferred B. If the connection changes, your actual destination disappears from the itinerary and you have no recourse, because officially you never wanted to go there.
The gentler cousins
If all of that sounds like more jeopardy than the saving justifies — and for most trips, frankly, it is — there are two entirely legitimate relatives worth knowing. The first is the open-jaw ticket: fly into one city, home from another, priced as a single return. Into Rome, out of Milan, train in between. No rules bent, often barely more expensive than a standard return, and it turns a there-and-back into a small tour.
Free stopover programmes are the second. Several hub carriers actively want you to break your journey in their home city for a few days at no extra airfare, because their government would like your hotel and restaurant money. The list of airlines offering this shifts over time, so check as you book rather than trusting anything written down — as I write this, the practice is common among hub carriers in the Gulf, Iceland, Portugal and East Asia. This is the second-destination trick with the airline's blessing: the extra city is a feature, not a loophole, and you actually get to see it.
Understanding the market, not beating it
I use hidden-city fares rarely, deliberately, and with hand luggage and low expectations. What I use constantly is the understanding underneath them: that a fare tells you about competition on a route, not about the cost of flying it. Once you know that, you stop taking prices personally. The expensive nonstop from your fortress hub isn't gouging aimed at you; it's the shape of the market, and the cheap through-fare is the same shape viewed from the other side. Sometimes you can position yourself on the favourable side — an open-jaw here, a stopover there, occasionally a city you'll never see. Mostly, you just book with fewer illusions, which is its own kind of saving.