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Making sense of what you are seeing

A price only means something next to its own history

A fare of $612 is neither good nor bad on its own. It is only meaningful against what that same flight has cost over the weeks you have been watching it. That is why every tracker keeps its own history rather than quoting you a market average: the useful question is not "is this cheap for this route" but "is this cheap for this departure, compared with what it has been." When a tracker has been running for two or three weeks, the chart underneath it is doing the work — the spread between its high and low tells you how much this particular flight actually moves, and whether today sits at the bottom of that range or in the middle of it.

What the direction is telling you

Fares rarely drift. They step, because airlines sell seats in booking classes and each class has its own price and its own limited number of seats. When a class sells out the next price becomes the cheapest available, which is why increases tend to stick. A drop usually means the opposite — the airline reopened a cheaper class because sales were slower than forecast. So a fare that has ticked up two or three times in a fortnight is signalling that the cheap inventory is draining, and waiting is a gamble. A fare that has just fallen is not necessarily on its way further down; it may simply be a class that was reopened and will close again.

Deciding before you are attached to the trip

The hardest part of buying a flight is that by the time you are watching the price you already want to go. Setting a target price when you create the tracker is what protects you from that: the decision gets made while you are still objective, and the alert tells you when the condition you set has actually been met. If a fare reaches your target and the history shows it has not been meaningfully lower in the period you have been watching, that is usually the moment to book rather than to hold out for a better one.

Two ways timing goes wrong

Buying too late is the familiar failure — the cheap classes are gone and the advance-purchase fares have expired. Buying too early is the quieter one: very far out, airlines often have not started actively managing a flight, so the fare on offer is a placeholder rather than a deal. The productive middle is when the airline is discounting to fill seats but the cheapest classes are still open. For most trips that is somewhere between one and three months ahead for short-haul, and two to six for long-haul, though route and season move those ranges considerably.

These patterns are covered in more depth in the fare guides — including how airline pricing works and when to book.