FlightAPI Multi-City Flight Price Search

Use this endpoint when the user needs to search flight prices for a trip involving three or more cities or multiple distinct legs (multi-city/open-jaw), rather than a simple round-trip or one-way journey. Prefer this over the one-way or round-trip endpoints when the origin of one leg differs from the destination of another.

• Invalid airport codes return an error or empty results
• Unavailable routes return no flight options
• Unsupported date formats cause bad request errors
• Requests with insufficient parameters return validation errors
• High-traffic periods may cause slower or partial responses