How to choose
The booking window is not one number
"Book early" is roughly right, and that is exactly what makes it expensive. The right window depends on how long the flight is — and the spread from one end to the other is more than threefold.
What we hold, and what we do not
We hold a recommended booking window for eleven destinations. That is not every destination we have data on — most of the others carry season and transport detail but no window — so everything here is true of those eleven and is not claimed about anywhere else.
What is interesting is that the eleven do not scatter. They line up almost perfectly against one thing: how long the flight is.
The longer the flight, the earlier and wider the window
Larnaca, under an hour in the air: three to eight weeks ahead. Budapest, three and a half hours: four to eight. Athens, three hours: five to eight. Prague, four hours: five to nine.
Rome and Vienna, three and a half hours each: six to ten. Barcelona and London, four and a half to just over five: seven to twelve. Paris and Amsterdam, five hours: eight to fourteen.
And Bangkok, ten and a half hours with no regular direct route: ten to sixteen weeks.
That is 3–8 at one end and 10–16 at the other. The same general advice — "book early" — is too early for Cyprus and too late for Bangkok, and it costs money in both directions.
Why it behaves this way
A short route with many operators settles late: there are enough seats and enough competition that the price does not run away until relatively close in. Booking four months ahead to Larnaca mostly means giving up flexibility without buying anything for it.
A long-haul behaves the opposite way: less frequency, fewer seats, and demand that accumulates early. There, waiting is the expensive move.
The finding that repeats across all eleven
We looked at the days that tend to be cheaper on each of the eleven. Tuesday appears on every single one — eleven out of eleven. Wednesday appears on nine.
The rest are scattered: Monday, Friday and Saturday each show up on three. Put another way, if you have one day of flexibility, Tuesday is the first place to look almost regardless of destination.
That is not a promise about price. It is the order worth checking in, and checking costs nothing.
What to do with it
Take your flight time and derive the window from it, using the bands the eleven actually show: about an hour, roughly 3–8 weeks; three to four hours, roughly 4–10; four and a half to just over five, roughly 7–14; over ten hours, roughly 10–16.
Then, inside that window, try moving the departure to a Tuesday. Those two things together are very nearly everything within your control before the provider sets the final price.
There is no single booking window. Derive it from the flight length — three to eight weeks for a short hop, ten to sixteen for a long-haul — and if you can move a day, Tuesday was the cheaper day on eleven of the eleven destinations we checked.
Where to go from here
- When to fly to Rome — and when not to
- Airport to city: what is actually waiting for you in six cities
- Search flights
- Plan a trip
The facts in this article come from our own destination knowledge. They are not a measured price: prices on this site always carry the date they were measured.
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