# `flights.supplier_unavailable` — Airline system unavailable

**HTTP status:** 503  
**Retryable:** yes — the same request may succeed later (reuse your Idempotency-Key)

## When it happens

The airline connection is temporarily unavailable or refused the request for a reason on its side.

## What to do

Retry later, or search again for other options.

## Example response

```json
{
  "type": "https://quickota.com/developers/errors/flights.supplier_unavailable",
  "title": "Airline system unavailable",
  "status": 503,
  "code": "flights.supplier_unavailable",
  "detail": "The airline connection is temporarily unavailable or refused the request for a reason on its side.",
  "suggestion": "Retry later, or search again for other options.",
  "retryable": true,
  "requestId": "req_7f3a2c9e41d0b8a6c5e21f90"
}
```

See [Errors](https://quickota.com/developers/guides/errors) for how to handle errors in general.