Observed US air-traffic delay programs - FAA NAS Status
Changed onThe ground stops, ground delay programs, airport closures, arrival and departure delays and de-icing programs the FAA currently has in force across the United States National Airspace System, each with the FAA's verbatim reason plus a Sugra classification of that free text onto a published vocabulary (weather, runway, volume, equipment, staffing, security). Filter by airport, event type, reason class, delay length and bounding box. This is OBSERVED delay, reported alongside the conditions-based Weather-Disruption-Risk index and never blended into it. United States only; consultative and not a substitute for an official preflight briefing, ATC or your airline.
Request
- Base URLhttps://sugra.ai
- AuthAPI key in header x-api-key
- TypeScriptA function with typed inputs. Its response is checked against the schema.
Query parameters
Comma-separated airport codes. Either the FAA three-letter identifier (JFK) or the four-letter US ICAO form (KJFK), which is normalized to it.
Keep only events of this program type. Asking for notam opts into them regardless of include_notams.
Keep only events matching this Sugra reason class. Matches ANY class the reason carries, not just the dominant one, so a runway closed for snow is found under both weather and runway.
Keep only events whose upper delay bound reaches this many minutes. Events that publish no delay figure, such as most ground stops, are excluded by it.
Bounding-box south edge.
Bounding-box north edge.
Bounding-box west edge.
Bounding-box east edge.
Include standing airport NOTAMs. Off by default because they are STATUS, not delay: the live feed carries multi-week notices such as an airport closed to transient general aviation except by prior permission, which would otherwise make a perfectly clear airport appear in a delay list. They are still counted in summary.by_type, so their existence is never hidden.
Maximum airports returned.
Response
Successful Response
Example response
{
"data": {
"query": {
"airports": "JFK,ORD",
"type": "ground_stop",
"reason_class": "weather",
"min_delay_minutes": 30,
"limit": 100
},
"summary": {
"airports_affected": 7,
"events_total": 11,
"by_type": {
"arrival_delay": 6,
"ground_stop": 2
},
"by_reason_class": {
"volume": 3,
"weather": 8
}
},
"total_matched": 3,
"count": 3,
"airports": [
{
"airport": "JFK",
"name": "John F. Kennedy International",
"lat": 40.6398,
"lon": -73.7789,
"event_count": 2,
"worst_delay_minutes": 61,
"types": [
"ground_stop",
"arrival_delay"
],
"reason_classes": [
"weather"
],
"events": [
{
"type": "ground_stop",
"reason": "ZDC / VOL:Compacted Demand",
"reason_class": "volume",
"reason_classes": [
"weather",
"runway"
],
"start_time": "2026-07-19T18:00:00Z",
"end_time": "2026-07-19T21:00:00Z",
"updated_at": "2026-07-19T17:45:00Z",
"min_minutes": 16,
"max_minutes": 61,
"average_minutes": 45,
"trend": "increasing",
"center": "ZDC",
"probability_of_extension": "Medium",
"time_raw": "2:45 pm EDT"
}
]
}
],
"coverage": "United States National Airspace System only.",
"attribution": {
"sources": [
{
"registry_key": "noaa/aviation-weather-center",
"source_name": "NOAA Aviation Weather Center",
"licence": "public-domain",
"citation": "NOAA/NWS Aviation Weather Center (aviationweather.gov)",
"disclaimer": "Advisory only; not a substitute for an official preflight briefing."
}
],
"effective_reexport": "allowed"
}
},
"meta": {
"endpoint": "/api/v1/fred/us/cpi",
"data_time": "2026-04-16T14:30:00Z",
"response_time": "2026-04-16T14:30:12Z",
"provider": "Sugra API v1.0.1",
"data_age_days": 8.532,
"source": "sugra_crypto",
"attribution": "Short interest and Reg SHO daily short volume data is owned by and sourced from FINRA (Financial Industry Regulatory Authority).",
"source_url": "https://fred.stlouisfed.org/series/UNRATE",
"citation": "Federal Reserve Bank of St. Louis (FRED) - Unemployment Rate (UNRATE) - https://fred.stlouisfed.org/series/UNRATE - retrieved 2026-11-02",
"fallback_chain": [
"sugra_crypto",
"sugra_finance"
],
"stale_since": "2026-09-08T12:00:00Z",
"period": "2026-Q1",
"notes": "the UKMTO report behind these counts is dated 2026-08-21 and is 11 days old"
}
}Changes
- info
added the optional property
/to the response with the status - info
added the optional property
/to the response with the status
- info
- breaking
added
subschema #1to the response bodyoneOflist for the response status - breaking
the response's body type changed from
objectto no type for status - breaking
removed the required property
from the response with the status - breaking
removed the required property
from the response with the status - warning
removed the optional property
from the response with the status - warning
removed the optional property
from the response with the status - warning
removed the optional property
from the response with the status - warning
removed the optional property
from the response with the status - warning
removed the optional property
from the response with the status - warning
removed the optional property
from the response with the status - warning
removed the optional property
from the response with the status - warning
removed the optional property
from the response with the status - warning
removed the optional property
from the response with the status
This list may be incomplete.
- breaking