AviationWeather vs DFlight API
Same instrument, two spec sheets — measured, not claimed.
AviationWeather vs DFlight API: common questions
Which is more reliable, AviationWeather or DFlight API?
On our scheduled checks, AviationWeather leads on measured uptime — AviationWeather at 94.4% versus DFlight API at 23.0% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, AviationWeather or DFlight API?
DFlight API has the lower median latency in our checks — AviationWeather responds in 230 ms versus DFlight API at 182 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do AviationWeather and DFlight API need an API key?
Neither needs a paid key — AviationWeather is callable with no signup, and DFlight API is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call AviationWeather and DFlight API from the browser?
Only DFlight API is browser-friendly — it returns CORS headers over HTTPS. AviationWeather needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are AviationWeather and DFlight API free for commercial use?
AviationWeather allows commercial use on its free tier, and DFlight API has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.