At least around Los Angeles, FlightRadar24.com only displays about 1 in 10 planes. Where Planefinder.net shows a lot more:
![](https://www.metabunk.org/data/MetaMirrorCache/contrailscience.com_skitch_Plane_Finder__E2_80_93_Flight_Radar27a80757586bb59f4628c0efa9502159.jpg)
It's a bit surprising as Planefinder claims to work just of ADS-B, but FlightRadar24 says it is ADS-B plus FAA data.
This means there are a lot more planes using ADS-B than I thought, and flightradar24 just has a poor network in the US (it's much better in Europe).
![](https://www.metabunk.org/data/MetaMirrorCache/contrailscience.com_skitch_Plane_Finder__E2_80_93_Flight_Radar27a80757586bb59f4628c0efa9502159.jpg)
It's a bit surprising as Planefinder claims to work just of ADS-B, but FlightRadar24 says it is ADS-B plus FAA data.
This means there are a lot more planes using ADS-B than I thought, and flightradar24 just has a poor network in the US (it's much better in Europe).
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