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Explainer

How Accurate Is Flight Tracking Data?

By The Flight Tracker Team · August 31, 2026

Usually accurate to within a few minutes. Occasionally wrong. Least reliable at exactly the moment you care most — during heavy disruption, when everything is changing faster than the data moves. If you need certainty about a time-critical decision, the airline is the source, not us and not any other app.

That is the short version. Here is the detail, because you deserve to know what you are looking at.

Where the status data comes from

Flight Tracker does not collect flight data itself. It reads a third-party flight data API — a commercial aviation data service called Aviation Edge — which aggregates schedule and status information from airlines and airports and republishes it in a single format.

So the chain looks like this:

1. An airline or airport system records an event — a revised estimate, a gate assignment, a departure.
2. That is passed into the aggregation service, directly or via an intermediary.
3. Our app asks the service for the current state of a flight.
4. You see it.

Each of those four steps adds a little latency, and each is a place where a value can be missing or stale.

It is polled, not streamed from the aircraft

This is the part most people get wrong about consumer flight apps in general.

Our app asks for data. It does not receive a continuous stream from the aircraft, and it is not connected to anything on board. When you open a flight, the app requests the current record and shows what comes back. Nothing pushes an update to your screen the instant reality changes.

That distinction matters because a different family of apps works another way. Some services are built on networks of ground receivers that pick up signals broadcast by aircraft, which gives them position and altitude updates seconds apart while an aircraft is within range of a receiver. Those apps can show a moving aircraft on a map with high positional fidelity, and they can also lose it entirely over oceans and remote terrain where no receiver is listening.

We are not that. We are a status and schedule service:

	Status feed (what we use)	Receiver-network services
Best at	Times, gate, terminal, baggage belt, cancellations	Position, altitude, track over ground
Update pattern	Reported events, polled	Continuous while in receiver range
Coverage gaps	Small airports, charters, cargo	Oceans, remote regions
Knows the gate?	Usually, when published	Usually not

Neither approach is better in the abstract. They answer different questions. If your question is “which gate, which belt, how late”, a status feed is the right tool. If your question is “exactly where is that aircraft right now”, it is not.

Why a tracker can disagree with the gate board

Five common causes, roughly in order of frequency:

Lag. The airport board is fed directly by the airport’s own operations system. We are two or three hops downstream. Under normal conditions the difference is a couple of minutes; during a bad afternoon it can be considerably more.

Different definitions. “Departed” can mean doors closed, brakes released, or wheels up depending on who reported it. Two sources can both be right and show different times.

Partial records. A flight may have a revised estimate but no new gate, or a gate but no revised estimate. A blank field means “not reported to us”, not “unchanged”.

Codeshares. The same aircraft carries several flight numbers. Status is normally filed under the operating number, so looking up your ticketed number can return a thinner or older record.

Local override. Airports and airlines make decisions in the building that only later reach a data feed — a stand change, a bus gate, a hold at the aircraft door.

When the app and the airport board disagree, the board is closer to the truth. When the airline and the board disagree, the airline is.

What we do about it

Concretely:

• We show scheduled, estimated, and actual times separately instead of collapsing them into one number, so you can see whether anything has actually been revised.
• We leave a field blank rather than guessing. An empty gate is honest; an invented one is not.
• We cover 4,000+ airports, which is a real figure rather than a marketing one. Coverage of small regional fields, charters, and cargo is patchy.
• Airport weather is general forecast and current-conditions data from a consumer weather service, not an aviation weather product intended for flight planning.
• We make no promise about currency. Updates usually land within minutes. Sometimes they do not.

The full breakdown of every source is on our data and accuracy page.

What to trust when sources conflict

A simple hierarchy, most authoritative first:

1. The airline — by app, desk, or phone. It is the only party that can rebook you and the only one whose answer is binding.
2. The airport’s own departure or arrival boards, once you are in the building.
3. A tracking app, including ours.
4. A time somebody screenshotted an hour ago. Not a source at all.

Use us for the early read: is this flight roughly on time, which terminal, has the gate appeared, which carousel. That is genuinely useful and it saves real time — see how to check flight status by flight number for the mechanics.

Then, for anything with money or a missed connection attached to it, confirm with your airline. We would rather tell you that plainly than have you find out at a closed bag drop.

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