Fli

by Punit AraniConnectorGet organised

Lets your AI assistant search Google Flights and find the cheapest dates to fly

About Fli

Fli is an open-source connector that gives an AI assistant two flight tools: search a date, and find the cheapest dates in a range. You ask in plain words and it shows prices, times and stops from Google Flights.

For Travellers comparing flightsPeople with flexible travel dates

Made by Punit Arani

An open-source project by developer Punit Arani, published on GitHub.

Stars: ★ 3.4k
License: MIT
Cost: Free
Level: Intermediate
Runs: Local

Screenshots

From the project's own repository.

Fli in a terminal listing flight options from SFO to Ontario with price, duration, stops and flight segments — Image: Punit Arani (MIT). Original file

Overview

Fli is an open-source connector that gives an AI assistant two flight tools: one searches flights on a given date, the other finds the cheapest dates across a range. You ask in plain words, and the assistant fills in airports, dates, cabin, stops, airlines and passengers, then shows prices, times and stops from Google Flights' public search page. It also includes a command-line tool. It suits travellers who want to compare flights by chatting instead of clicking through filters.

Its cheapest-dates tool prices a whole range of up to 93 days in one search, instead of one date at a time.

Try these first

Start with the first one: it is a small task you can check easily.

Find one-way economy flights from [airport] to [airport] on [date next month]. List the three cheapest with times and stops.First try · read-only
What are the cheapest dates to fly from [city] to [city] in January for a 5-day round trip?
Search non-stop business class flights from SFO to NRT on [date], prices in EUR.
Find flights from [airport] to [airport] on [date], leaving between 6 and 10 in the morning, excluding [airline].

Example prompts written by Agent Flows Hub.

Capabilities

From the creator's documentation.

Toolset	What your agent can do	Access
Flight search	Flights on one date, one-way or round trip, sorted by price, duration or time	Google Flights page
Cheapest dates	Prices across a date range, up to 93 dates, for one-way or round trips	Google Flights page
Filters	Cabin class, stops, departure window, airlines, alliances and layover length	Google Flights page
Passengers	Adults, children and infants, up to 9 travellers	Google Flights page
Currency and region	Prices in another currency, language or country setting	Google Flights page

Good to know

You are planning a trip and want to compare flights or find the cheapest day to leave. Fli gives your MCP client a flight search and a date search, so you can ask in plain words and refine the filters in conversation.

Limits

It reads Google Flights' public search page, so results can change or stop working when Google changes that page. It only searches and does not book flights.
Some filters (bags, emissions, basic economy) are dropped, multi-city search is not supported, and searches with children or infants can return few or no results.

Notes by Agent Flows Hub (original project name: fli), written from the creator's documentation, not from running it ourselves. Fli MCP server guide · Fli README: search transport and limits

Stuck setting it up?

Tell us what happened. We take a look first; if it needs paid work, you get an estimate before anything starts.

Get help

How to start

Open your AI agentClaude Code, Codex, Cursor or another agent that supports MCP.
Paste the install requestIt asks your agent to read the official instructions, tell you what it will connect to and wait for your OK.
Give it a first taskAsk for one-way economy flights between two airports on a date next month. Compare the cheapest result with the same search on the Google Flights website.

Steps follow the creator's instructions. The request tells your agent to read them first and wait for your OK.

Before you start

An AI agent that supports MCP, such as Claude Code, Codex or Cursor.
Python 3.10 or newer and pipx, to install the flights package
An MCP client such as Claude Desktop, plus a few lines added to its settings file
It connects to the internet. Your agent will show you what before installing.
Free. Nothing to pay.

Details

Made by: Punit Arani
License: MIT Terms
Runs on: Your computer

View source Official docs Report a problem

For AI agents

This page as a Markdown install brief:

/en/library/fli-flight-search/install.md

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GitHub

Fli