n8n Travel Planner Workflow: OpenRouter Nemotron + SerpApi

Plan a complete trip in n8n—automatically research destinations, build an itinerary, and estimate costs using OpenRouter (Nemotron) + SerpApi

This n8n Travel Planner Workflow turns an n8n Form submission into a polished, day-by-day travel plan. It uses OpenRouter’s Nemotron in a multi-agent setup and supplements destination research with SerpApi Google Search—so your users get activities, food suggestions, and an estimated budget without manual work.

What this workflow does

• Collects trip requirements from an n8n Form, including origin, destination, duration, travelers, budget, and interests.
• Formats the answers into a single structured travel-planning prompt for an OpenRouter-powered Travel Assistant.
• Runs a multi-agent planning process with three specialized sub-agents working on the same trip request.
• Researches attractions and local experiences (including hidden gems) using OpenRouter, with SerpApi Google Search for destination lookups.
• Generates a day-by-day itinerary including food suggestions using OpenRouter.
• Estimates visa details and total trip costs, calculating an estimated budget across flights, lodging, food, transport, and activities via OpenRouter.
• Compiles everything—research, itinerary, and budget—into a final travel plan response.

Use cases

• SaaS teams adding a travel-planning assistant to their onboarding flow via an n8n Form
• Automation engineers building an OpenRouter + Google Search research pipeline for structured outputs (itineraries + budgets)
• Operators who want a repeatable day-by-day itinerary generator for different user inputs

Technical details

• n8n Form for trip intake (published form URL)
• OpenRouter API credentials to configure the main Travel Assistant and each sub-agent (Nemotron)
• SerpApi credential using the n8n-nodes-serpapiserp api tool for Google searches
• LangChain agent tools using n8nn8n-nodes-langchainagent and n8nn8n-nodes-langchainagent tool
• Supporting nodes such as code and sticky note for prompt formatting and workflow clarity

Setup note: Add OpenRouter and SerpApi credentials, configure model settings for the assistant and sub-agents, publish the n8n Form, and share the Form URL with users.