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Ignav Flight API vs Transport for United States

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

APIIgnav Flight APIHEALTHY77Transport for United StatesHEALTHY84
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d98.3%100%
P50 · ms7731093
P95 · ms46001963
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedData copyright transit agencies / Umo IQ
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Ignav Flight API vs Transport for United States: common questions

Which is more reliable, Ignav Flight API or Transport for United States?

On our scheduled checks, Transport for United States leads on measured uptime — Ignav Flight API at 99.02% versus Transport for United States at 100% 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, Ignav Flight API or Transport for United States?

Ignav Flight API has the lower median latency in our checks — Ignav Flight API responds in 773 ms versus Transport for United States at 1093 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 Ignav Flight API and Transport for United States need an API key?

Neither needs a paid key — Ignav Flight API is callable with no signup, and Transport for United States is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Ignav Flight API and Transport for United States from the browser?

Only Transport for United States is browser-friendly — it returns CORS headers over HTTPS. Ignav Flight API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Ignav Flight API and Transport for United States free for commercial use?

Ignav Flight API has unclear commercial terms, and Transport for United States 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.