Skiplagging, also called hidden city ticketing, is the trick of booking a flight that connects through the city you actually want, then walking off at the layover instead of taking the last leg. Say a nonstop to Chicago is $400, but a flight to Denver that happens to connect through Chicago is $220. You book the Denver ticket, get off in Chicago, and never board the second flight. On paper you just saved $180. In practice you picked up a stack of risk the sticker price never shows you.
Why it's sometimes cheaper
Fares aren't priced by distance. A nonstop into a busy hub can cost more than a longer trip that only passes through it, because the airline charges what that specific market will bear. The connecting city is a leg on someone else's route, so it gets the leftover, cheaper bucket. That gap is real, and it's the whole reason the trick exists.
But the gap is also the airline's margin, and they know every seat they sold. The same system that set the low connecting fare notices when you don't show up for the leg you paid for.
What it actually costs you
Start with the bag. You can't check one, because it gets tagged to the final city and you'll never see it again. So skiplagging only works carry-on, which rules it out for a lot of trips.
Then the itinerary. If you miss a leg, the airline cancels the rest of the ticket automatically, so this never works on a round trip. The return you booked is simply gone the moment you walk out at the connection.
And the airline pushes back. They can void the ticket, strip your miles, shut your frequent flyer account, and in repeat cases come after you for the fare difference. Routes change too: a flight that connected through your city last month may get rerouted through a different hub, and now you're flying somewhere you never wanted to go. None of that shows up next to the price, the same way the real cost of a cheap fare hides in the fine print.
Where we land on it
We don't send these. The savings are usually smaller than they look once you account for carry-on only trips and a dead return, and the downside, a canceled ticket or a closed account, is wildly out of proportion to saving a few dollars on one flight. It's the opposite of the boring, repeatable edge we're after.
What actually moves the number for most people is flexibility and attention, not a loophole. That's why we check your saved routes every morning and send the three best honest fares we found, the kind you can check a bag on and fly home from.