For AI agents & developers

Onward Flight sells verified flight reservations (proof of onward travel): a real, airline-verifiable PNR for visa applications and immigration. An AI agent can price, buy, and manage a reservation end-to-end — no human checkout required.

Quickstart for agents

Read the OpenAPI discovery document at /api/openapi.json.
Optionally get a firm price with POST /api/agentic/quote.
Call POST /api/agentic/flight-booking. The first call returns 402 with a payment challenge; retry with an Authorization: Payment <token> header to complete the purchase.
Receive the booking id, PNR(s), and a magic link for the traveler.

Agentic API

POST/api/agentic/quote

Firm price before paying (breakdown + total + advisory expiry).

POST/api/agentic/flight-booking

Headless purchase via the Machine Payments Protocol (HTTP 402 payment challenge). Returns booking id, PNR(s), and a magic link.

GET/api/agentic/booking/{id}

Booking status: state, PNR(s), route, hold expiry.

POST/api/agentic/booking/{id}/refund-request

File a refund request (manual, discretionary review — does not move money).

Public APIs (no auth)

GET/api/airports?keyword=

Airport / city autocomplete.

GET/api/products/public

Active product catalog and pricing.

POST/api/flights/search

Search bookable itineraries.

GET/api/reservations/{pnr}

Public reservation status lookup.

Pricing (USD, from)

One-way reservation: $16.00 per passenger
Round-trip: +$7.00 flat surcharge
Activate later add-on: $2.00
Flexible reservation add-on: $8.00

Discovery & integration

OpenAPI (agentic / MPP discovery) https://onwardflight.co/api/openapi.json
llms.txt https://onwardflight.co/llms.txt
AI plugin manifest https://onwardflight.co/.well-known/ai-plugin.json
OAuth authorization server metadata https://onwardflight.co/.well-known/oauth-authorization-server
OpenID configuration https://onwardflight.co/.well-known/openid-configuration
MCP server (Model Context Protocol) https://mcp.onwardflight.co/mcp

Policies

Terms & conditions https://onwardflight.co/terms-and-conditions
Privacy policy https://onwardflight.co/privacy-policy
Refund policy https://onwardflight.co/refund-policy
Dispute policy https://onwardflight.co/dispute-policy

Contact

Support: support@onwardflight.co