Search the route on AirHint when you already have a city and a date and you want a book-or-wait line the site describes as free. On November 8, 2026 the how-it-works page says you enter the route and the date, then book now or create a price alert. The alert is free. You buy the ticket on the airline or a booking site. The page says AirHint does not guarantee the fare. It says that as of October 2026 the service checks more than 1 million fares a day, using history collected since 2015, and that accuracy is often around 80%, depending on the airline and the flight. A thin history gets no recommendation.
Do not pick a weekday from a proverb. The same page says the day you buy on did not change the average fare in a Ryanair study of about 40,000 observations from London Stansted to Barcelona. How often a drop showed up was different: Thursday accounted for about 23% of drops in that study, and Saturday and Sunday about 2% each. A separate Ryanair and easyJet comparison found the drops clustered on Tuesdays for Ryanair and Wednesdays for easyJet. The day you fly did matter in the Ryanair departures they studied. Those are the studies on the page, not a rule for a different airline. The terms, last updated 6 August 2026, say a price they expected to fall can rise, and that you decide when to book. The operator named in the terms is Favencia OÜ in Tartu, Estonia.
Skip Priority Alert if you think it buys a cheaper seat. The terms say it is a one-off upgrade for a single alert, sold by Apple or Google, and that the price is whatever that store shows in your country. The terms do not print a number. They say it checks more often, does not make prices fall, does not improve the prediction, and is not a subscription. A refund, if the store grants one, removes the priority and leaves an ordinary alert.
Google Flights, last read October 21, 2026, is the other free page for the same job: a date grid, a price graph, and price insights that use history. That page was not reopened today. Hopper is the app whose prediction sits next to paid extras. Its homepage on October 30 did not restate a fee, the older listing says Price Freeze costs extra, and the FTC's July 2026 settlement is why the fee screen matters. Use AirHint for the written book-or-wait line and the free alert. Buy the ticket on the airline. Pay for a faster check only after the store shows the price, and do not expect that check to change the fare.