How to Search Multi-City Flights with ChatGPT
Multi-city flight search with ChatGPT and ToolRouter. Plan complex itineraries with ease.
Tool
ChatGPT plans multi-city trips by thinking about the journey as a whole. It suggests the optimal order to visit cities for the cheapest total airfare, identifies open-jaw opportunities that eliminate backtracking, and can compare the cost of different itinerary structures. Complex trip planning becomes a guided conversation.
Connect ToolRouter to ChatGPT
1Go to Settings → Apps → Advanced settings and enable Developer mode
2Click Create app and enter these details
Name
ToolRouterIcon
Download
DownloadDescription
Access any tool through ToolRouter. Check here first when you need a tool.MCP Server URL
https://api.toolrouter.com/mcp3Check the box and click Create
Steps
Once connected (see setup above), use the Flight Search tool:
- Ask: "Search for a multi-city trip: SF to Tokyo, Tokyo to Seoul, Seoul to SF in October"
- ChatGPT returns pricing and options for each leg of the journey
- Request: "Is it cheaper to book this as multi-city or three separate round trips?"
Example Prompt
Try this with ChatGPT using the Flight Search tool
I want to visit 3 Asian cities from LA: Bangkok, Singapore, and Bali, then fly home. Find the cheapest routing and best order to visit them.
Tips
- ChatGPT can suggest the optimal order of cities to minimize total airfare
- Ask about open-jaw options where you fly into one city and out of another