# FAA API

> FAA returns US airport delay and closure events as a workflow and API.

FAA returns airport delay and closure events through Get airport delays, using a US airport name, city, or three-letter code. Results include event type, reason, trend, timing, delay estimates, and whether an event is active.

- Page: https://fous.com/tools/faa
- Handle: `@faa`
- Category: [Travel](https://fous.com/tools/category/travel)
- Source website: https://faa.gov
- Last verified: Sep 29, 2026

## Methods

### Get airport delays

Operation `get_airport_delays`, version 1. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.

Get current FAA delay and closure events for a US airport by name, city, or code. Cities with multiple airports resolve to one airport; reported delays may not reflect every flight.

**Input**

| Field | Type | Required | Example | Description |
|---|---|---|---|---|
| `airport` | string | yes | `"LAS"` | US airport name, city, or three-letter airport code, such as Denver or LAX. |

**Input schema**

```json
{
  "type": "object",
  "required": [
    "airport"
  ],
  "properties": {
    "airport": {
      "type": "string",
      "description": "US airport name, city, or three-letter airport code, such as Denver or LAX.",
      "examples": [
        "LAS",
        "Denver",
        "Los Angeles International Airport"
      ]
    }
  },
  "additionalProperties": false,
  "examples": [
    {
      "airport": "LAS"
    },
    {
      "airport": "Denver"
    },
    {
      "airport": "Los Angeles International Airport"
    }
  ]
}
```

**Output**

| Field | Type | Example | Description |
|---|---|---|---|
| `events` | array |  |  |
| `events[].type` | string | `"ground delay program"` |  |
| `events[].trend` | string or null | `"increasing"` |  |
| `events[].reason` | string or null | `"thunderstorms"` |  |
| `events[].end_time` | string or null | `"2026-09-29T07:59:00+00:00"` |  |
| `events[].start_time` | string or null | `"2026-09-28T23:00:00+00:00"` |  |
| `events[].average_delay` | string or null | `"202 min"` |  |
| `events[].maximum_delay` | string or null | `"385 min"` |  |
| `events[].raw_faa_reason` | string or null | `"thunderstorms"` |  |
| `events[].status_page_link` | string | `"https://nasstatus.faa.gov/list"` |  |
| `airport_code` | string | `"LAS"` |  |
| `airport_name` | string | `"Harry Reid International"` |  |
| `delay_active` | boolean | `true` | Whether any FAA event is active now. |
| `status_page_link` | string | `"https://nasstatus.faa.gov/list"` |  |

**Example input**

```json
{
  "airport": "LAS"
}
```

**Example output**

```json
{
  "events": [
    {
      "type": "ground delay program",
      "trend": null,
      "reason": "thunderstorms",
      "end_time": "2026-09-29T07:59:00+00:00",
      "start_time": "2026-09-28T23:00:00+00:00",
      "average_delay": "202 min",
      "maximum_delay": "385 min",
      "raw_faa_reason": "thunderstorms",
      "status_page_link": "https://nasstatus.faa.gov/list"
    },
    {
      "type": "departure delay",
      "trend": "increasing",
      "reason": "weather-related traffic management",
      "end_time": null,
      "start_time": null,
      "average_delay": "30 min",
      "maximum_delay": "45 min",
      "raw_faa_reason": "TM Initiatives:STOP:WX",
      "status_page_link": "https://nasstatus.faa.gov/list"
    }
  ],
  "airport_code": "LAS",
  "airport_name": "Harry Reid International",
  "delay_active": true,
  "status_page_link": "https://nasstatus.faa.gov/list"
}
```

## Quick start

Replace `YOUR_API_KEY` with a Fous API key. To create one, open Developers at the bottom of Fous Studio, turn on Developer mode, then go to API keys (https://app.fous.com/keys). Change the values in `input` to run the same tool on new data.

```bash
curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 180 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@faa",
  "visibility": "public",
  "operation": "get_airport_delays",
  "version": 1,
  "input": {
    "airport": "LAS"
  },
  "response": {
    "format": "json"
  }
}'
```

```python
# Save as fous.py and run with python3 fous.py. No packages needed.
import json
import urllib.error
import urllib.request

api_key = "YOUR_API_KEY"

body = json.loads("{\n  \"api\": \"@faa\",\n  \"visibility\": \"public\",\n  \"operation\": \"get_airport_delays\",\n  \"version\": 1,\n  \"input\": {\n    \"airport\": \"LAS\"\n  },\n  \"response\": {\n    \"format\": \"json\"\n  }\n}")
request = urllib.request.Request(
    "https://api.fous.com/v1/query",
    data=json.dumps(body).encode("utf-8"),
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    method="POST",
)
try:
    with urllib.request.urlopen(request, timeout=180) as response:
        result = json.load(response)
except urllib.error.HTTPError as error:
    raise RuntimeError(f"HTTP {error.code}: {error.read().decode('utf-8', errors='replace')}") from error
if result.get("success") is False:
    raise RuntimeError(result.get("error", {}).get("message", "Request failed"))
print(json.dumps(result["data"]["output"], indent=2))
```

```typescript
// Save as fous.mts and run with npx tsx fous.mts.
const apiKey = "YOUR_API_KEY";

const response = await fetch("https://api.fous.com/v1/query", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${apiKey}`,
    "Content-Type": "application/json",
  },
  signal: AbortSignal.timeout(180_000),
  body: JSON.stringify({
  "api": "@faa",
  "visibility": "public",
  "operation": "get_airport_delays",
  "version": 1,
  "input": {
    "airport": "LAS"
  },
  "response": {
    "format": "json"
  }
}),
});
type ApiResult = { success: boolean; data?: { output: unknown }; error?: { message: string } };
const result: ApiResult = await response.json();
if (!response.ok || result.success === false) {
  throw new Error(result.error?.message ?? `HTTP ${response.status}`);
}
if (!result.data) throw new Error("Missing API response data");
console.log(result.data.output);
```

## Use from an AI assistant

Connect this tool to Claude Code, Claude Desktop, Cursor, VS Code, Codex and any MCP client as its own MCP server. Each method is a typed tool whose arguments are the method’s input.

- Server URL: `https://api.fous.com/mcp/tools/faa`
- Authorization: `Authorization: Bearer <Fous API key>`

**Tools**

- `get_airport_delays`: Get airport delays. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.
- `fous_get_run`: the result of a run that was still going, by its `request_id`. Free.

Claude Code:

```bash
claude mcp add --scope user --transport http fous-faa https://api.fous.com/mcp/tools/faa --header "Authorization: Bearer ${FOUS_API_KEY:?Set FOUS_API_KEY to your Fous API key}"
```

To give the assistant every tool, connect `https://api.fous.com/mcp`: it finds one with `fous_search_tools` and runs it with `fous_run_tool`. Setup for other clients: https://fous.com/llms-full.txt.

## Use cases

- Check delay and closure events for a US airport.
- Track average and maximum reported delay times.
- Review event reasons and trends.
- Check whether an FAA event is active.

## FAQ

### Can I run it with my own inputs?

Yes. Change the inputs in Studio and press Run, or send new inputs from your code, or ask a connected AI assistant.

### Can I call this FAA tool as an API?

Yes. Send a POST request to /v1/query with your Fous API key and the inputs, and get JSON back.

### How much does it cost?

Each completed run costs 1 credit. Failed runs without a completed receipt are free; completed work can remain charged if delivery is interrupted. With pay as you go, a credit costs 1¢. Monthly plans cost less per credit.

### Do I need a FAA account?

No. You only need a Fous account.

### How current is the data?

Fous gets the data from faa.gov when you run it. Some results are reused for up to 24 hours, and results that use your account or key are never reused. It was last verified on Sep 29, 2026.

### What delay events affect an airport?

Get airport delays returns FAA delay and closure events for a US airport by name, city, or code.

### How long are airport delays?

Get airport delays returns average and maximum delay estimates for reported events.

### When does an airport delay start or end?

Get airport delays returns start and end times for reported events.

## Related

- [FlightAware API](https://fous.com/tools/flightaware.md): FlightAware provides public flight status and dated flight details, airport arrivals and departures limited to displayed history and 20 flights per direction, plus today’s delays and cancellations when shown.
- [Flightradar24 API](https://fous.com/tools/flightradar24.md): Flightradar24 provides live flight tracking, recent history, flight status and times, plus upcoming airport departures and arrivals; history and schedules are limited to recent and upcoming flights.
- [TSA Wait Times API](https://fous.com/tools/tsa-wait-times.md): Security wait time estimates at US airports.
- [Amtrak API](https://fous.com/tools/amtrak.md): Amtrak passenger train travel and status.
- [Expedia API](https://fous.com/tools/expedia.md): Expedia helps travelers find hotels, vacation stays, and travel deals, with hotel prices and flight options for selected destinations and dates; flight listings may be limited.
- [Ryanair API](https://fous.com/tools/ryanair.md): Ryanair provides flights and fares, including lowest one-way prices by destination or day for selected dates; prices and availability can change.
- [AirNow API](https://fous.com/tools/airnow.md): Current and forecast air quality for reporting areas in the United States and covered cities in Canada and Mexico.
- [IQAir API](https://fous.com/tools/iqair.md): City air quality readings and forecasts from IQAir.
- [All Travel tools](https://fous.com/tools/category/travel)