How to track military aircraft

Military aircraft are a favourite of flight tracker users: tankers on station, transports crossing continents, a spy plane now and then. How many you see depends a lot on which tracker you use.

Why military aircraft appear at all

Military aircraft fly among airliners, and the rules that make airliners visible mostly apply to them too. In the US, an aircraft with ADS-B must transmit at all times unless the FAA authorises otherwise for sensitive defence, security, intelligence or law enforcement missions. In Europe, transport-type state aircraft had to carry transponders meeting the full standard, ADS-B included, from December 2020. The UK's Ministry of Defence has said its aircraft must use Mode S when flying alongside civil traffic, that open-source tracking is a by-product, and that they can switch Mode S off when kept apart from civil traffic.

Tankers, transports and large surveillance aircraft spend much of their time among civil traffic, which is why they make up most of the military aircraft on trackers.

Many military aircraft broadcast only their identity and height, not their position. Flightradar24 notes that older civil and many military aircraft carry only Mode S transponders, so the networks place them by multilateration, timing their signals at several receivers: see MLAT explained. That only works where enough receivers hear them, usually higher up.

Trackers that hide some, and trackers that show everything

Several of the community networks began after ADS-B Exchange was sold in 2023; airplanes.live, for one, says it started that September. They are fed by volunteers' receivers, so their coverage is best where enthusiasts live.

How enthusiasts follow them

• Filters and military buttons on the trackers above, to show only military aircraft over a region.
• Accounts on social media that post notable military movements, such as AircraftSpots and CivMilAir on X, each followed by more than 100,000 people, and national ones such as ItaMilRadar in Italy.
• Their own receivers. Hobbyists with a receiver at home can run tools such as Planefence with plane-alert-db, an open list of more than 17,000 interesting aircraft, nearly 10,000 of them military, that posts an alert when one flies over.

What you will not see

• Aircraft with their transponders off. Military aircraft kept apart from civil traffic can switch off, and fighters on operations usually do not broadcast.
• Aircraft too low for MLAT. Low down or away from dense receiver networks, an aircraft that sends no position can vanish from the map.
• Aircraft hidden by the tracker. Blocked aircraft on commercial trackers, and owners' privacy requests.

What trackers show is what aircraft choose to broadcast, heard by whoever has a receiver nearby. It is a partial picture, and never a complete account of military activity.

How FlyScout finds military flights worth a look

Every few minutes, FlyScout looks at the world's military aircraft as the volunteer receiver networks hear them, unfiltered. It judges them by their own rules, never by those for airliners: steep descents, tight turns and circuits are a military aircraft's ordinary working day. It picks out:

• Tankers and surveillance aircraft on station, flying laps of one area: 78 of them between 20 September and 16 October 2026. See why is a military plane circling.
• High flyers above 52,000 ft, higher than any airliner or business jet is certified to go. See the highest-flying aircraft.
• Rare types, seen in the air on no more than one day in ten over the last month: 27 sightings between 26 September and 15 October 2026. See rare military aircraft.

Military aircraft squawking an emergency code are found like any other. With FlyScout Pro, you can set an alert for military aircraft, anywhere or near you.