Start with the ordinary variables
Flight inventory moves quickly. A low fare class can disappear between searches. One screen may show a nonstop flight while another includes a connection, a different airport, or a different cabin bundle. Taxes, fees, currency conversion, baggage, seat selection, and refundability can also change the total.
The U.S. Department of Transportation notes that airfare fluctuates constantly and that market averages may reflect differences such as nonstop versus connecting service or different airports in the same city market. Before blaming the device, compare the exact flight number, cabin, fare rules, currency, passenger count, and final checkout total.
The session can still change what you see
Account status, loyalty membership, region, referral source, app-only promotions, or an experiment can change an offer or the order in which options appear. A mobile app and a desktop website may also use different caches or refresh inventory at different moments.
Those differences are frustrating because the interface rarely explains them. Still, a correlation is not a diagnosis. Seeing a higher price after a repeat search does not by itself prove that a company identified desperation, recognized the device, or deliberately raised that person’s fare.
What surveillance-pricing research does show
The FTC’s surveillance-pricing study found that pricing intermediaries can use data such as location, browser history, shopping behavior, and the channel used to buy when tailoring prices or promotions. The agency described a broad commercial market, not proof that every airline changes every fare for every device.
That distinction is important. Data-driven targeting is real enough to deserve scrutiny, but each observed fare still has many possible explanations. The truthful claim is that a recognizable buying session can create more data for ranking, targeting, and promotion systems, not that clearing one cookie guarantees a cheaper ticket.
How to compare without guessing
Make a small comparison record: search time; flight number and date; passenger count; cabin and fare bundle; currency; signed-in or signed-out state; booking website or app; baggage and seat fees; and final total. Leave payment details and booking references out of anything you share.
Compare the same itinerary at nearly the same time. Match currency, country, passenger count, cabin, baggage, and refund rules. Capture the final total rather than the first teaser price. If a difference persists, save screenshots and note whether one session was signed in, referred by an ad, or using an app promotion.
Privacy controls can reduce selected tracking and referral context, but they cannot freeze inventory or guarantee a lower fare. Cloak removes common tracking tags, blocks selected tracker and ad-tech requests, and reduces selected browser-recognition signals where Chrome permits. Its receipt can show what changed in the browser; it cannot claim why an airline set a price.
Primary sources