You've heard the rules. Book on a Tuesday at midnight. Book exactly 47 days before departure. Clear your cookies so the airline doesn't see you coming. Use incognito. Each one sounds like a trick the airlines don't want you to know.
None of them hold up.
Where the myths come from
The Tuesday thing is a fossil. Two decades ago, carriers loaded new fares early in the week, and for a while a Tuesday-morning dip was real. Pricing is automated and continuous now — fares move whenever demand, seat inventory, and a competitor's price move, which is to say all the time and on no schedule you can put in your calendar.
The "book X days out" rules come from averaging millions of fares and finding the day where the average was lowest. But you're not booking the average route on the average day. You're booking one pair of cities on one set of dates, and the window that was cheapest last year tells you almost nothing about yours.
And the incognito tab? Prices don't go up because an airline recognized you. They go up because a fare bucket sold out between Monday and Thursday. Same price in a private window, same price on your friend's laptop.
What actually moves the number
Two things, mostly. How flexible you are, and how often someone is looking.
Flexibility is the big one. Shifting a departure by a day or two routinely beats any booking-time trick, because you're stepping into a cheaper fare bucket instead of hoping yours drops. That's why we expand every saved route by three days in each direction instead of pricing the one date you typed.
Looking often is the other half. A fare you'd have booked is frequently gone a week later — not because you booked on the wrong day, but because you stopped checking. The edge was never a secret hour. It was paying attention without it becoming a chore.
So what do you actually do
Be loose on dates if you can. Check consistently rather than cleverly. That's the entire strategy, and it's also the whole reason Gateway Radar exists — we do the checking every morning so the right day to book is just the day the good fare shows up in your inbox.