You can track most commercial flights using free websites and apps that pull data from radar and aircraft transponders

Real-time flight tracking works because commercial aircraft broadcast their location, altitude, and speed through a system called Automatic Dependent Surveillance-Broadcast (ADS-B). Ground stations and volunteers around the world receive these signals and feed them into public databases. You can view this data on websites like FlightRadar24, FlightAware, and Plane Finder without paying anything — though paid versions add features like historical data and alerts.

The basic process is straightforward: you enter a flight number, airline, or aircraft registration, and the site shows you the plane's current position on a map, its altitude, speed, and sometimes the pilot's heading. Most sites update every few seconds. This is the same data that air traffic control uses, though with a slight delay for security reasons.

Key Takeaways

  • FlightRadar24 and FlightAware are the two largest free flight tracking sites and work on desktop, tablet, and phone.
  • You need either a flight number (like AA123) or the aircraft's tail number (like N12345) to find a specific plane.
  • Most commercial aircraft are trackable, but some military and private planes do not broadcast their location.
  • Free versions show real-time position and basic details; paid subscriptions add historical playback and custom alerts.

Finding a flight number or aircraft registration

If you know the airline and departure time, you can find the flight number on the airline's website or a booking confirmation email. Look for a code like "UA456" or "DL789" — that is the flight number you enter into a tracking site.

If you only know the aircraft type or airline but not the specific flight, you can search by departure and arrival airports instead. Most tracking sites have a search field where you type the origin and destination, and they show you all flights on that route in the air right now.

For aircraft registration (the tail number), look at your boarding pass or confirmation — it is sometimes printed there. If not, you can search the flight number on the tracking site first, and the site will show you the tail number of the aircraft assigned to that flight.

Using FlightRadar24

FlightRadar24 is the most widely used free flight tracker. Go to flightradar24.com, and you will see a world map with aircraft icons. In the search box at the top left, type a flight number (like "AA100") or tail number (like "N12345"), and the site will highlight that aircraft on the map.

Click on the plane icon, and a sidebar opens showing the flight number, aircraft type, current altitude, speed, heading, and departure and arrival airports. The map shows the flight's path so far as a line, and a projected path ahead. You can also see the gate or runway if the plane is on the ground.

The free version updates in real time and works on phones and tablets. The paid version (Radar Premium) adds the ability to replay past flights, set up alerts, and remove ads, but the free version is sufficient for tracking a flight you are on or expecting to arrive.

Using FlightAware

FlightAware (flightaware.com) works similarly but has a slightly different interface. Type a flight number in the search box at the top of the page, and FlightAware shows you the flight's status, current position, altitude, speed, and estimated arrival time. It also displays a timeline of events — takeoff time, current position, and expected landing time.

FlightAware is particularly useful if you want to see whether a flight is on time, delayed, or cancelled. The site pulls this information from the airline and air traffic control, so you get both the real-time position and the official status. You can also see historical data about how often that specific flight is delayed.

Like FlightRadar24, FlightAware's free version is fully functional for tracking. The paid version adds features like email alerts and the ability to track multiple flights at once, but most people do not need these.

Tracking planes by tail number or aircraft type

If you want to follow a specific aircraft over time — for example, a plane you flew on yesterday — you can search by tail number. Every aircraft has a unique registration, usually visible on the fuselage. In the United States, tail numbers start with "N" (like N123AB). In other countries, they use different prefixes: "G" for the UK, "F" for France, "D" for Germany.

Enter the tail number into FlightRadar24 or FlightAware, and the site shows you that aircraft's current location and recent flight history. You can see where it has been and where it is headed next. This is useful if you are curious about a plane you saw or if you want to track a specific aircraft's movements over several days.

Understanding what you cannot track

Most commercial airliners are trackable because they are required to broadcast their location. However, some aircraft do not appear on public tracking sites. Military aircraft, government planes, and many private jets can disable their transponders or use special modes that do not broadcast to the public.

If you search for a flight and it does not appear, it may be a smaller regional flight, a cargo plane with limited tracking, or a private aircraft. Some flights also disappear from tracking sites temporarily if they are in airspace where ground stations do not receive the signal — this is rare in North America and Europe but more common over oceans or remote areas.

Using airline apps and websites

Your airline's own app or website is often the fastest way to track your flight. Log in with your confirmation number or booking reference, and the airline shows you the real-time status, gate number, and estimated arrival time. Many airline apps also send push notifications if your flight is delayed or if the gate changes.

Airline tracking is useful because it includes information that public tracking sites do not have — like whether your luggage is loaded, which gate you are departing from, and whether the flight is overbooked. However, airline apps do not show the aircraft's position on a map the way FlightRadar24 does.

Frequently Asked Questions

Can I track a plane if I only know the airline and departure time?

Yes. On FlightRadar24 or FlightAware, search by departure and arrival airports, and the site shows all flights on that route currently in the air. You can also call the airline directly with your confirmation number, and they will tell you the flight number and current status.

Why does a flight disappear from the tracking map?

A flight may disappear if the aircraft's transponder is turned off (which happens on the ground), if it is in an area with no ground station coverage, or if there is a temporary technical issue with the tracking service. It will reappear once the aircraft is back in range of receivers.

Do I need to pay to track a flight?

No. FlightRadar24, FlightAware, and Plane Finder all offer free real-time tracking. Paid subscriptions add features like historical playback and alerts, but they are not necessary to see where a plane is right now.

Can I track a private plane or helicopter?

Most private planes and helicopters do not broadcast their location publicly, so they do not appear on tracking sites. Some do, depending on the owner's settings and the aircraft's equipment. Military and government aircraft are almost never trackable on public sites.

How often does the tracking data update?

Most tracking sites update every few seconds, showing the aircraft's current position, altitude, and speed. The data has a slight delay (usually less than one minute) for security reasons, but it is close enough to real time for practical purposes.