Real-time plane tracking uses free websites and apps that pull data from aircraft transponders

You can track almost any commercial plane while it is in the air using websites like FlightRadar24, FlightAware, or Plane Finder. These sites receive signals directly from aircraft transponders—the radio equipment that broadcasts a plane's location, altitude, speed, and direction. The data updates every few seconds, so you see the plane move across a map in real time. No login or payment is required for basic tracking on any of these platforms.

The most useful reason to track a plane is to confirm whether a flight is actually delayed or still on schedule. If you are waiting for someone to arrive, or if you booked a connection, knowing the plane's actual position tells you more than the airline's website does. A plane that is still 45 minutes away from the airport will land later than the scheduled time, even if the airline has not yet updated its status. Tracking also shows you whether a plane is circling due to weather or ground congestion, which explains why a landing keeps getting pushed back.

Key Takeaways

  • FlightRadar24, FlightAware, and Plane Finder are the three largest free tracking sites and show the same flights with slightly different interface designs.
  • You need only the flight number or the airline name and departure city to find a plane; no booking confirmation or ticket number is required.
  • The map shows the plane's current altitude, ground speed, and heading, plus the estimated time until landing based on its current position and speed.
  • Military planes, small private aircraft, and some international flights do not appear on these trackers because they do not broadcast their position publicly.

Finding a flight on FlightRadar24

FlightRadar24 is the most popular tracking site and works on desktop and mobile browsers. Go to flightradar24.com and you will see a world map with planes already displayed as small aircraft icons. To find a specific flight, use the search box at the top left. Type the flight number (for example, "United 447" or "UA447"), and the site will show you every instance of that flight number in the air right now, plus recent flights that have already landed.

If you do not have the flight number, search by route instead. Type the departure city and arrival city (for example, "New York to Los Angeles"), and FlightRadar24 will list all flights currently flying that route. Click on any flight and the map will center on that plane. You will see a sidebar with the aircraft type, current altitude in feet, ground speed in knots or kilometers per hour, and the estimated arrival time at the destination airport.

The estimated arrival time is calculated from the plane's current position and speed, so it updates as the plane flies. If the plane is moving slower than usual—often because it is waiting to land—the estimate will increase. If the plane is making up time, the estimate will decrease. This is more accurate than the airline's website during the final hour of flight, because the airline updates its estimate less frequently.

Using FlightAware and Plane Finder as alternatives

FlightAware (flightaware.com) and Plane Finder (planefinder.net) work almost identically to FlightRadar24. Both have search boxes at the top, both show the same real-time data, and both are free without registration. The main difference is the map interface and how information is displayed in the sidebar.

FlightAware tends to load slightly faster on older devices and shows more historical data about a flight—such as how often that specific flight number is delayed and by how many minutes on average. Plane Finder has a cleaner map interface and is easier to use on a phone. If one site is slow or not loading, try another; they all pull from the same transponder data, so the plane's position will be the same across all three.

What information the tracker shows you

Once you click on a plane, the tracker displays several pieces of information. The flight number and aircraft type appear at the top. Below that you will see the current altitude (in feet above sea level), the ground speed (how fast the plane is moving over the ground, usually between 400 and 550 knots for a jet), and the heading (the compass direction the plane is flying, shown as a number from 0 to 360 degrees).

The tracker also shows the departure airport, arrival airport, and estimated time of arrival based on the plane's current speed and distance remaining. Some trackers also display the airline, the registration number (a unique identifier for that specific aircraft), and the age of the aircraft. This information is purely informational; it does not change what the airline will do or when the plane will actually land.

Planes that do not appear on tracking sites

Not every plane in the sky shows up on these trackers. Military aircraft, government planes, and some private jets do not broadcast their position publicly, so they will not appear on any free tracking site. Small general aviation aircraft (small private planes) sometimes broadcast their position and sometimes do not, depending on the equipment installed.

Some international flights, particularly those operated by airlines in certain countries, may not transmit their position over the same networks that feed FlightRadar24 and FlightAware. If you search for a flight and it does not appear, it does not mean the flight is not real—it means that particular plane is not transmitting its location to the public tracking network.

Why tracking estimates differ from airline updates

The arrival time shown on a tracking site is calculated from the plane's current position and speed, while the airline's website uses a different method. Airlines update their estimated arrival time based on flight plans, weather forecasts, and air traffic control information—but they update less frequently than the tracker does. During the final 30 to 60 minutes of a flight, the tracker's estimate is usually more accurate because it is based on what the plane is actually doing right now, not on a forecast.

However, the tracker cannot predict delays caused by ground congestion at the destination airport. If the plane is on schedule but the airport is backed up with landings, the tracker will show the plane arriving on time until it actually starts circling. Once the plane begins holding patterns near the airport, the tracker's estimate will increase to reflect the extra time needed to land.

Tracking a plane on your phone

All three major tracking sites work on mobile browsers without downloading an app. Open your phone's browser, go to flightradar24.com, flightaware.com, or planefinder.net, and search for your flight the same way you would on a computer. The map will be smaller, but you can zoom in and out by pinching the screen.

FlightRadar24 and FlightAware also offer free mobile apps available on iOS and Android. The apps have the same features as the websites and sometimes load faster on slower phone connections. Plane Finder also has an app, though the free version shows fewer planes than the website does. If you plan to track flights regularly, downloading an app is more convenient than opening a browser each time.

Frequently Asked Questions

Can I track a plane if I do not have the flight number?

Yes. Search by the departure and arrival cities instead. The tracker will show all flights currently flying that route, and you can identify yours by the airline, departure time, or aircraft type. If multiple flights are on the same route, check the airline's website to confirm which one is yours.

Why does the estimated arrival time keep changing?

The tracker recalculates the arrival time every few seconds based on the plane's current speed and distance to the airport. If the plane slows down, the estimate increases. If it speeds up or gets closer, the estimate decreases. During the final hour, changes usually reflect ground congestion or weather delays, not a change in the plane's actual speed.

Does tracking a plane tell me if my flight is delayed?

It tells you whether the plane is on schedule based on its current position and speed. If the estimated arrival time is later than the scheduled time, the flight is effectively delayed. However, the tracker does not show the reason for the delay—only that the plane will not arrive when originally planned.

Can I track a private plane or helicopter?

Only if it broadcasts its position. Most private jets and helicopters do not transmit to the public tracking network, so they will not appear on FlightRadar24 or FlightAware. Some do, and if yours does, you can search for it by tail number (the aircraft registration).

Is it legal to track planes?

Yes. The data comes from public radio broadcasts that the aircraft itself transmits. FlightRadar24, FlightAware, and Plane Finder are all legal services operating in multiple countries. Tracking a plane for personal information is not illegal in any jurisdiction.