Aviation Data API Comparison
AviationStack vs SkyLink API
Both APIs return real-time flight data, but they are built on very different foundations. AviationStack aggregates flight status from airline and ATC systems; SkyLink reads a true ADS-B receiver network and adds weather, navaids and predictive data — the full aviation stack behind one API key.
6×
Faster position data
~5 s vs 30–60 s
61%
Lower entry price
$19 vs $49.99 / month
10×
More free requests
1,000 vs 100 / month
99.9%
Uptime SLA
vs none published
Real-time
See what real-time actually means
AviationStack aggregates flight status with a 30–60 second lag. SkyLink streams raw ADS-B positions sampled roughly every 5 seconds — here is the difference.
Position data delay
lower is betterRaw ADS-B receiver data sampled every ~5 seconds — aircraft glide smoothly across the map instead of jumping between stale, aggregated positions.
Feature comparison
AviationStack vs SkyLink API at a glance
Pricing, data freshness, coverage, and the endpoints that matter most when you are building production aviation applications.
| Feature | AviationStack | SkyLink API |
|---|---|---|
| Free tier | 100 requests / month | 1,000 requests / month, HTTPS included 10× more |
| Entry paid plan | $49.99 / mo · 10,000 requests | $19 / mo · 5,000 requests Save 62% |
| Mid plan | $149.99 / mo · 50,000 requests | $59 / mo · 20,000 requests Save 61% |
| Real-time flight tracking | Yes — airline/ATC sourced, 30–60 s delay | Yes — ADS-B, ~5 s updates |
| True ADS-B positions | No — not raw receiver data | Yes — ICAO24 hex, bounding-box queries |
| Historical data | 3 months on paid tiers | Up to 365 days (90 d Pro, 365 d Business) |
| METAR / TAF weather | Not available | Yes — decoded, US & international |
| Airport database | Basic airport info | Full ICAO/IATA, runways & frequencies |
| Flight-time & delay data | Not available | ML flight-time + live FAA delay status (US) |
| Uptime SLA | Not published | 99.9% |
AviationStack pricing as publicly listed; SkyLink pricing as listed on skylinkapi.com. SkyLink historical ADS-B covers 90 days on Pro and 365 days on Business. METAR/TAF and FAA delay-status coverage vary by region; FAA delay status is US-only.
Pricing
How the pricing compares
SkyLink comes in lower at every paid tier. Here is the monthly price side by side.
Entry tier
~5,000–10,000 requests / month
Mid tier
50,000 requests / month
Bar length is relative to the higher price in each tier. SkyLink quotas differ slightly (5,000 / 20,000 / 70,000) — see the table above for exact figures. Prices as listed on skylinkapi.com.
Beyond flight status
Where SkyLink API goes further
The data AviationStack does not provide is often exactly what production aviation tools depend on. SkyLink covers it natively, so you can consolidate vendors and ship faster.
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 1,000-request monthly free trial, self-serve paid plans from $19 with an instant API key, 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 AviationStack does not offer at all.
AviationStack vs SkyLink API: common questions
Both APIs return real-time flight data, but they are built on very different foundations. AviationStack aggregates flight status from airline and ATC systems; SkyLink reads a true ADS-B receiver network and adds weather, navaids and predictive data — the full aviation stack behind one API key.
AviationStack: $49.99 / mo · 10,000 requests. SkyLink API: $19 / mo · 5,000 requests. Free access — AviationStack: 100 requests / month; SkyLink API: 1,000 requests / month, HTTPS included. Every SkyLink plan includes all data endpoints and paid plans include a commercial licence.
AviationStack: No — not raw receiver data. SkyLink API: Yes — ICAO24 hex, bounding-box queries, refreshed roughly every 5 seconds.
AviationStack: Not available. SkyLink API: Yes — decoded, US & international, on the same API key as flight data.
Get an API key, run SkyLink alongside your current provider while you map response fields using the API reference, then move traffic over. Official SDKs for Python, Node.js and Go keep the change small, and paid plans include a key immediately after checkout.
Ready to switch from AviationStack?
True ADS-B positions every ~5 seconds, decoded METAR and TAF weather, ML flight-time estimation, and HTTPS on the free tier — the complete aviation data stack behind one API key.