Do flight prices change based on your device?
You check a flight twice and it has gone up. Rumour blames your cookies. The reality is more interesting — and incognito mode will not save you.
No, an airline does not raise the price because you searched twice. It is the most widespread belief in online travel, and it survives because it explains something real: the price genuinely did change between your two visits. The culprit is simply not your browser.
What actually happened between your two searches
An airfare is not a number sitting on a shelf: it is a band of seats, sold until it runs out. When the last seat at $480 goes, the system moves to the next band — for everyone, at the same moment.
You were not punished. You arrived after somebody else. The full mechanics are in how airlines set their prices, and they account for the overwhelming majority of increases people notice between two visits.
Second cause, less dramatic: caching. Comparison sites and engines sometimes show a result stored minutes earlier. The price that "went up" is often the old price finally disappearing.
What genuinely changes the price
Three factors really move what you see, and none involve your cookies.
- Country of purchase. The same route can be sold at different fares depending on the market where the booking is filed. It is legal, documented, and tied to taxation and local competition.
- Display currency. Converting a fare into another currency adds an exchange margin. The number moves without the ticket changing.
- The channel. Airline site, online agency, comparison engine: they do not all reach the same bands or the same agreements.
Incognito mode does nothing
It is the most-shared tip, and the most useless. Opening a private window does not open a closed fare band: availability lives in the airline's systems, not in your browser.
What it can do, marginally: stop a site returning a stored view, or put you back on the default market if you had switched country. Useful for checking, no effect on the actual price.
Same for phone versus laptop. App-only promotions exist, but they are announced as such — not a disguised penalty.
What this belief really costs
It turns monitoring into superstition.
Someone who believes they are fighting a spying algorithm clears cookies, switches browsers, checks at midnight — and misses the point: whether the displayed price is good for that route. The ritual consumes the attention the only useful question deserves.
What to do instead
Stop policing your own browser, and have the route watched.
A price cannot be judged in isolation, only against its history. Kestrelia queries several providers continuously and compares each offer to its route's usual level: you hear about it when the fare genuinely drops, not when a page refreshes.
And if you want to know why two tickets on the same flight show different amounts — this time for a real reason — read why two seats side by side do not cost the same.