# cancel_flight_run
> Cancel an in-progress Flight run.
Cancel an in-progress run of a [Flight](/concepts/flights), identified by the Flight UUID and the sequential `run_number` (from [`list_flight_runs`](../list-flight-runs)).

Returns `canceled: true` on a successful transition. Calling on an already-terminal run (`SUCCEEDED`, `FAILED`, `CANCELLED`) or one that doesn't exist returns a tool error.

The SQL equivalent is [`MD_CANCEL_FLIGHT_RUN`](/sql-reference/motherduck-sql-reference/flights/md-cancel-flight-run).

## Input parameters

| Parameter | Type | Required | Description |
|---|---|---|---|
| `id` | string (UUID) | Yes | The Flight UUID. |
| `run_number` | integer | Yes | Sequential run number to cancel. |

## Output schema

```json
{
  "success": boolean,
  "canceled": boolean,
  "error": string
}
```

## Example usage

```json
{ "id": "80000000-0000-0000-0000-000000000001", "run_number": 42 }
```

## Related

- [`list_flight_runs`](../list-flight-runs) — Find runs that are still in progress.
- [`run_flight`](../run-flight) — Trigger a new run.
- [`MD_CANCEL_FLIGHT_RUN`](/sql-reference/motherduck-sql-reference/flights/md-cancel-flight-run) — SQL equivalent.


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