Aviation Data API Comparison
Cirium vs SkyLink API
Cirium provides premium aviation analytics and data through enterprise agreements. SkyLink offers accessible, self-serve aviation data — true ADS-B, decoded weather, airports, navaids, charts and ML predictions — with transparent pricing from a free tier.
Self-serve
Start in minutes
no enterprise sales cycle
1,000
Free requests / month
instant access
From $18.59
Transparent pricing
vs custom quotes
99.9%
Uptime SLA
production-grade
Feature comparison
Cirium vs SkyLink API at a glance
Premium enterprise analytics versus accessible, self-serve aviation data.
| Feature | Cirium | SkyLink API |
|---|---|---|
| Free / self-serve access | Enterprise onboarding | 1,000 requests / month, instant Self-serve |
| Pricing | Custom / quote-based | Transparent plans from $18.59 Transparent |
| Real-time flight tracking | Yes — premium feeds | Yes — ADS-B, ~5 s updates |
| True ADS-B positions | Yes — enterprise feeds | Yes — ICAO24 hex, bounding-box queries |
| METAR / TAF weather | Available in some products | Yes — decoded, US & international |
| Airport / navaid database | Yes — premium | Full ICAO/IATA, runways & frequencies |
| ML flight-time & FAA delays | Analytics products (enterprise) | ML flight-time + live FAA delay status (US) |
| MCP server for AI | Not available | Yes — native MCP server |
| Historical data | Yes — extensive (enterprise) | Up to 365 days (90 d Ultra, 365 d Mega) |
| Best fit | Large enterprises & analysts | Developers & product teams |
Cirium offers extensive premium aviation analytics; this comparison focuses on developer-facing API access. Verify current details with the provider. SkyLink FAA delay status is US-only.
Beyond flight status
Where SkyLink API fits better for builders
When you need real-time aviation data in a product without an enterprise contract, SkyLink is built for you.
True ADS-B, ~5-second updates
SkyLink reads raw ADS-B receiver data — ICAO24 hex, callsign, latitude, longitude, altitude, ground speed and track — sampled roughly every 5 seconds, with bounding-box queries for any map viewport.
Decoded METAR & TAF weather
Fully decoded METAR observations and TAF forecasts across US and international airfields — wind, QNH, visibility, cloud layers, temperature and dew point — alongside live flight data.
Complete airport & navaid database
Search 74,000+ airports by ICAO, IATA, city, location or IP, with runways, frequencies, navaids (VOR, NDB, ILS) and elevation.
ML flight-time, FAA delays & carbon
An ML gate-to-gate flight-time model, a real-time FAA delay-status feed, and ICAO-based carbon estimates — all behind one key.
Quick scan
Capability scorecard
Why teams move
Why developers choose SkyLink API
One API for the whole stack
ADS-B, weather, NOTAMs, airports, navaids, charts, schedules, ML predictions and an MCP server — behind a single key and one SLA. Consolidate vendors and ship faster.
Transparent, developer-first pricing
A free tier with 1,000 requests/month, self-serve paid plans from $18.59, and no sales calls or annual contracts to get started.
Production-grade reliability
99.9% uptime SLA, region-local endpoints and sub-second responses — built for apps that can’t afford downtime.
One API key
The whole aviation stack
Everything below ships under a single SkyLink key - most of it Cirium does not offer at all.
Premium data, without the premium contract
True ADS-B, weather, charts and ML predictions — self-serve, transparent pricing, one API key.