What a flight tracker does and where to find one

A flight tracker is a website or app that shows you where a plane is right now, how fast it's moving, what altitude it's at, and when it's expected to land. You can search by flight number, airline, airport, or aircraft type. The tracker pulls data from radar systems, aircraft transponders, and airline schedules, then displays the information on a map with the plane's current position marked.

The most widely used free trackers are FlightRadar24, FlightAware, and Flightradar24. All three have websites and mobile apps. FlightAware also integrates with many airline apps, so you may see tracking data without leaving your airline's interface. Each tracker updates every few seconds during flight, though the exact refresh rate depends on your internet connection and the tracker's server load.

Key Takeaways

  • Flight trackers show real-time position, speed, altitude, and estimated arrival time by pulling data from radar and aircraft transponders.
  • You can search by flight number (the easiest method), departure airport, arrival airport, or airline name.
  • A flight tracker tells you if a plane is delayed, diverted, or on schedule, but the airline app or website is the official source for gate changes and cancellations.
  • Flight trackers work best when the plane is in the air; they show less detail on the ground or before departure.
  • Some trackers offer paid subscriptions for features like alerts and historical flight data, but the free version is sufficient for monitoring a single flight.

How to search for your flight

The fastest way to find your flight is to search by flight number. This is the code printed on your ticket and boarding pass—it looks like "UA456" or "DL1200" (airline code plus numbers). Type it into the search box on FlightAware or FlightRadar24, and the tracker will show you that specific flight's current status and position.

If you don't have the flight number, search by departure and arrival airports instead. Use the three-letter airport codes (LAX for Los Angeles, JFK for New York, ORD for Chicago). The tracker will show all flights between those two airports, and you can identify yours by departure time and airline. This method takes longer but works if your ticket doesn't show the flight number clearly.

You can also search by airline and departure time. Enter the airline name, the airport you're leaving from, and the approximate time your flight departs. The tracker will narrow the results to flights matching those details. This is useful if you're tracking someone else's flight and only know roughly when they're leaving.

Reading the flight map and data display

Once you've found your flight, the tracker shows a map with a plane icon marking the aircraft's current location. The map is zoomable—pinch or scroll to see more detail or a wider view. A line shows the planned flight path from departure to arrival airport. As the plane moves, the icon updates in real time, and the line may show the actual path flown if the plane has deviated from the planned route.

Below or beside the map, you'll see a data panel with the flight's vital information. This typically includes the current altitude (in feet), ground speed (how fast the plane is moving relative to the ground), and heading (compass direction). You'll also see the estimated time of arrival (ETA) at the destination airport. Some trackers show the aircraft type (for example, "Boeing 737-800") and the plane's tail number, which is useful if you want to research that specific aircraft's history.

The data panel also displays the flight's status: on time, delayed, boarding, in flight, or landed. If the flight is delayed, the tracker usually shows the new estimated arrival time. However, the airline's official app or website is the authoritative source for gate changes, cancellations, and reasons for delays—the flight tracker shows position and timing but not always the full operational picture.

Understanding what the tracker shows before and after flight

Before the plane takes off, the flight tracker shows the scheduled departure time and the aircraft assigned to that flight. You may see the plane's current location if it's already at the gate or taxiing. However, detailed real-time tracking usually doesn't begin until the plane pushes back from the gate and starts moving toward the runway. Until then, the tracker may show the plane as stationary or update only every few minutes.

Once the plane lands and comes to a stop at the gate, the tracker typically stops updating or updates very slowly. The plane icon may stay on the arrival airport for several minutes or longer. At this point, the flight tracker's usefulness ends—check the airline's app for baggage claim information and ground transportation details instead.

Using flight tracker alerts and notifications

Most flight trackers offer the option to set up notifications for a specific flight. On FlightAware and FlightRadar24, you can enter your email address or phone number and choose which events trigger an alert: departure, landing, delays, or diversions. When that event happens, you'll receive an email or text message.

Free accounts usually allow one or two alerts per flight. Paid subscriptions unlock more alerts and features like historical flight data and the ability to track multiple flights at once. For monitoring a single flight, the free tier is sufficient. Set up an alert for departure and landing so you know when the plane has taken off and when it's about to arrive.

Keep in mind that tracker alerts may arrive a minute or two after the airline's own notification system, so don't rely on the flight tracker as your only source of urgent information. If you need to know when ready about a gate change or cancellation, check the airline's app directly.

Why flight trackers sometimes show incomplete or delayed information

Flight trackers depend on data from radar systems and aircraft transponders. In some regions—particularly over oceans or remote areas—radar coverage is sparse, so the tracker may show a gap in the flight path or update less frequently. This is normal and doesn't mean the plane has disappeared; it straightforward means the tracker has fewer data points to work with.

Some aircraft, especially older regional jets, have older transponders that transmit less detailed information. The tracker may show position and altitude but not ground speed or heading. Military aircraft and some government flights don't transmit transponder data at all, so they won't appear on any public flight tracker.

Occasionally, a tracker may show a flight as delayed or on time when the airline's app shows something different. This happens because the tracker updates based on radar data (actual movement) while the airline updates based on its own scheduling system (planned movement). The airline's information is official; the tracker's information is observational. Both can be correct—the plane may be moving but not scheduled to arrive as early as the radar suggests.

When to use a flight tracker versus the airline app

Use a flight tracker when you want to see where the plane physically is right now and how fast it's moving. Use the airline app when you need official information about your flight: gate number, boarding time, cancellations, delays, baggage claim, or seat assignments. The two tools answer different questions.

If your flight is delayed, the flight tracker will show you the plane's actual position and help you understand why—for example, if the plane is still in the air from a previous flight, or if it's on the ground but hasn't pushed back yet. The airline app will tell you the new departure or arrival time and the reason for the delay (weather, mechanical, crew, etc.). Check both to get the full picture.

For tracking someone else's flight—a family member or friend arriving at an airport—a flight tracker is ideal because you don't need their ticket or password. You only need the flight number or departure and arrival airports. This is one of the most common uses for casual flight tracking.

Frequently Asked Questions

Can I see a flight tracker map on my phone?

Yes. FlightAware, FlightRadar24, and Flightradar24 all have free mobile apps for iOS and Android. The apps work the same way as the websites—search by flight number or airport, and you'll see the live map and flight data. The app may update slightly faster than the website because it doesn't rely on a web browser.

Why does the flight tracker show the plane landed but the airline app says it's still in the air?

The flight tracker uses radar data, which updates every few seconds. The airline app uses its own scheduling system, which may update less frequently. Usually the tracker is more current. If the discrepancy lasts more than a few minutes, check the airline app for official information—it's the source of truth for operational decisions.

Can I track a flight if I don't have the flight number?

Yes. Search by departure airport, arrival airport, and approximate departure time. The tracker will show all flights on that route around that time. Identify your flight by airline name and compare the departure time to your ticket. This method is slower than searching by flight number but works if your ticket doesn't show the code clearly.

Do I need to pay for a flight tracker?

No. FlightAware and FlightRadar24 offer free tracking for individual flights. Paid subscriptions add features like custom alerts and historical data, but the free version is sufficient for monitoring a single flight in real time. You will not need to pay to track a flight you're taking or someone else is taking.

What if the flight tracker shows a plane heading in the wrong direction?

Planes sometimes take indirect routes due to weather, air traffic control instructions, or jet stream positioning. The tracker shows the actual path the plane is flying, not the shortest path between airports. If the plane is heading away from the destination, it may be detouring around a storm or following a published air route. The estimated arrival time accounts for these detours, so the ETA should still be accurate.