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Aare.guru API vs DFlight API

Same instrument, two spec sheets — measured, not claimed.

APIAare.guru APIHEALTHY88DFlight APIDEAD0
Uptime · 30d
Uptime · 90d100%11.8%
Uptime · 30d100%0.0%
P50 · ms1025319
P95 · ms2993668
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Aare.guru API vs DFlight API: common questions

Which is more reliable, Aare.guru API or DFlight API?

On our scheduled checks, Aare.guru API leads on measured uptime — Aare.guru API at 100% versus DFlight API at 11.8% 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, Aare.guru API or DFlight API?

DFlight API has the lower median latency in our checks — Aare.guru API responds in 1025 ms versus DFlight API at 319 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 Aare.guru API and DFlight API need an API key?

Neither needs a paid key — Aare.guru API 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 Aare.guru API and DFlight API from the browser?

Only Aare.guru API is browser-friendly — it returns CORS headers over HTTPS. DFlight API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Aare.guru API and DFlight API free for commercial use?

Aare.guru API has unclear commercial terms, 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.