---
title: ToolRouter — Use Case
description: Step-by-step guide for a real-world ToolRouter use case with agent-specific instructions.
url: https://toolrouter.com/tools/flight-search/use-cases/search-multi-city-itineraries
---
# Search Multi-City Flight Itineraries

Multi-city trips are notoriously difficult to book. Standard flight search tools are designed for simple round trips, and piecing together individual one-way segments often costs more than a properly structured multi-city itinerary. Open-jaw routing -- flying into one city and out of another -- can save both money and backtracking time, but most travelers do not know how to search for it.

The search_flights skill handles multi-segment searches, and find_airport identifies the best airports for each leg. You can plan a trip that flies into London, takes a train to Paris, then flies home from Paris without needing to retrace your steps. This kind of itinerary optimization is hard to do manually but straightforward when you have real-time search across all segments simultaneously.

**Tool:** [Flight Search](https://toolrouter.com/tools/flight-search)
**Skills:** search_flights, find_airport

## Agent Guides

- [How to Search Multi-City Flights with Claude](https://toolrouter.com/tools/flight-search/use-cases/search-multi-city-itineraries/claude): Guide for Claude
- [How to Search Multi-City Flights with ChatGPT](https://toolrouter.com/tools/flight-search/use-cases/search-multi-city-itineraries/chatgpt): Guide for ChatGPT
- [How to Search Multi-City Flights with Copilot](https://toolrouter.com/tools/flight-search/use-cases/search-multi-city-itineraries/copilot): Guide for Copilot
- [How to Search Multi-City Flights with OpenClaw](https://toolrouter.com/tools/flight-search/use-cases/search-multi-city-itineraries/openclaw): Guide for OpenClaw
