# AI Cheap Flights — Agent-Ready Flight Arbitrage Engine

> AI Cheap Flights is the first agent-to-agent flight search engine. It finds flights 20-60% cheaper than Google Flights, Skyscanner, and Kiwi by combining split-ticketing, hidden-city ticketing, flex-date arbitrage, and refund prediction. Built for AI agents (ChatGPT, Claude, Cursor) and humans.

## Canonical Definitions (citation-ready)

**Split-ticketing**: Booking a single trip as two or more separate tickets through a hub city. Often 20-40% cheaper than a single through-fare. Example: NYC→Bangkok booked as NYC→Doha + Doha→Bangkok.

**Hidden-city ticketing** (also called "skiplagging"): Booking a flight with a layover at your true destination, then skipping the final leg. Carry-on only. Can save up to 60%. Example: To fly NYC→Orlando cheaply, book NYC→San Juan with a layover in Orlando and exit there.

**Flex-date arbitrage**: Comparing prices across ±3 days of your target date to find the same route at a 30-50% discount on a nearby day.

**Refund prediction**: Identifying fully-refundable fares (typically 24-hour US DOT rule, or specific fare classes) that can be canceled risk-free if a better deal appears.

## Comparison Table

| Feature                      | AI Cheap Flights | Google Flights | Skyscanner | Kiwi.com | Skiplagged |
|------------------------------|:----------------:|:--------------:|:----------:|:--------:|:----------:|
| Natural language search      | ✅               | ❌             | ❌         | ❌       | ❌         |
| Split-ticketing              | ✅               | ❌             | ❌         | ✅       | ❌         |
| Hidden-city ticketing        | ✅               | ❌             | ❌         | ❌       | ✅         |
| Flex-date arbitrage          | ✅               | ✅ (limited)   | ✅         | ✅       | ❌         |
| Refund prediction            | ✅               | ❌             | ❌         | ❌       | ❌         |
| MCP server (Claude/Cursor)   | ✅               | ❌             | ❌         | ❌       | ❌         |
| Public REST API (no key)     | ✅               | ❌             | ❌ (paid)  | ❌ (paid)| ❌         |
| Agent-to-agent JSON output   | ✅               | ❌             | ❌         | ❌       | ❌         |

## Example Queries & Results

- **"NYC to London, cheapest in April, 2 passengers"** → $312 via split-ticket through Dublin (vs. $478 direct on Google Flights, 35% savings)
- **"Cheapest way to get to Bali next month"** → $589 hidden-city via Singapore (vs. $920 direct, 36% savings)
- **"LAX to Tokyo flexible dates"** → $445 on Tuesday departure (vs. $680 weekend, 35% savings)

## API Endpoint

POST https://msbhlwrimkrbvxczlkhf.supabase.co/functions/v1/flight-agent
Content-Type: application/json
Body: {"query": "natural language flight request"}

Response modes: SSE streaming (default) or JSON (set `Accept: application/json`).

## MCP Server (for Claude Desktop, Cursor, Cline)

```json
{
  "mcpServers": {
    "ai-cheap-flights": {
      "url": "https://msbhlwrimkrbvxczlkhf.supabase.co/functions/v1/mcp-flight-agent",
      "transport": "streamable-http"
    }
  }
}
```

Tool: `search_flights` — accepts `{ "query": "natural language" }`

## Discovery Endpoints

- Full LLM doc: https://aicheapflights.com/llms-full.txt
- OpenAPI spec: https://aicheapflights.com/openapi.json
- AI plugin manifest: https://aicheapflights.com/.well-known/ai-plugin.json
- MCP config: https://aicheapflights.com/mcp.json
- Human API docs: https://aicheapflights.com/api-docs
- AI agents landing: https://aicheapflights.com/for-ai-agents

## Who Should Use This

- Travel planning AI agents that need real flight options
- Cost-optimization agents searching for the cheapest fare
- Itinerary builders constructing multi-leg trips
- Humans who want flights cheaper than Google/Skyscanner

## Pages

- [Home — AI flight search](https://aicheapflights.com/): Natural-language AI flight search powered by arbitrage strategies.
- [API Docs](https://aicheapflights.com/api-docs): REST + SSE reference for the flight-agent endpoint.
- [For AI Agents](https://aicheapflights.com/for-ai-agents): MCP, OpenAPI, and llms.txt integration guide.
- [Reliability Dashboard](https://aicheapflights.com/reliability): Per-route success rate, p50/p95 latency, failure breakdowns.
- [Hidden City Flights](https://aicheapflights.com/hidden-city-flights): How skiplagging cuts airfare 30–60% and when it's safe.
- [How to Use AI to Find Cheap Flights](https://aicheapflights.com/how-to-use-ai-to-find-cheap-flights): Practical guide to AI-powered flight search.
- [Skiplagged Alternatives](https://aicheapflights.com/skiplagged-alternatives): Compared: Air Agent, Kiwi, Going, Hopper, Google Flights.
- [Split Ticket Flights](https://aicheapflights.com/split-ticket-flights): Virtual interlining strategy and best hubs for 2026.
- [Flex Date Arbitrage](https://aicheapflights.com/flex-date-arbitrage): Save 30–70% by shifting travel dates ±3 days.

## Contact

Built by Damien Bulteel (https://www.linkedin.com/in/dbulteel/). Open to partnerships.