19 months that changed travel booking: a timeline
In nineteen months, AI travel booking went from lab demo to a reality with partners, protocols and money at stake — with one resounding retreat along the way. This is the timeline of the moves that matter, and the lesson they teach when read together.
The timeline
| Date | Move |
|---|---|
| January 2025 | OpenAI launches Operator, an agent that browses websites and executes tasks. First disintermediation alarms in the industry. |
| July 2025 | ChatGPT debuts its agent mode: autonomous browsing, login and booking with user permission. |
| September 2025 | The agentic commerce protocols appear: Google's agent payments protocol (on the 16th) and ACP, from OpenAI and Stripe (on the 29th). Google seals an agentic commerce deal with PayPal. Sabre launches its agentic APIs and MCP server. |
| October 2025 | OpenAI DevDay: ChatGPT becomes an app platform — Booking.com and Expedia among launch partners — on a base of more than 800 million users. |
| November 2025 | Google announces it will allow hotel and flight booking inside AI Mode, with Booking, Expedia, Marriott, IHG, Choice and Wyndham. Booking and Expedia shares fall 4-7%; Google has to clarify publicly that it "does not intend to be an OTA". |
| January 2026 | Google presents the Universal Commerce Protocol; Accor integrates its ALL app into ChatGPT in more than 20 languages. |
| February 2026 | ChatGPT starts testing ads (9 February), with travel among the categories the industry expects to see first. Marriott confirms its bookings will be processed inside AI Mode, not as an external link. |
| March 2026 | Plot twist: OpenAI removes Instant Checkout from the main chat and gives up processing transactions, delegating them to third-party apps. Booking and Expedia shares rise on the news. |
| 30 April 2026 | Tripadvisor Instant Booking shuts down: the death certificate of "Book on Metasearch", the previous attempt to book without leaving the search engine. |
| 6 May 2026 | Mindtrip, with Sabre inventory and PayPal payments, completes the first flight booking entirely inside a chat. |
| 19 May 2026 | At Google I/O, hotels are announced as the next vertical for the Universal Commerce Protocol. |
| June 2026 | At HITEC, "agentic governance" emerges as the year's big trend. |
| July 2026 | A hands-on test by Skift reveals chatbots sometimes ignore connected apps and answer on their own. |
| 7 August 2026 | Google confirms a limited test in the United States of agent-assisted hotel booking inside AI Mode, with Booking, Expedia, Marriott, IHG, Wyndham and Amadeus. It does not clarify whether payment completes without leaving Google. |
| 18 August 2026 | OpenAI announces its ads are reaching 31 European countries, Spain included — a week after declaring them launched in the UK, Mexico, Brazil, Japan and South Korea. |
What the sequence reveals
First reading: the business model is unsolved. In nine months the industry went from "apps in the chat" to "transactions inside the AI" — with an OpenAI retreat in between that says it all. When the player with the most users in the world gives up charging for the sale, it is not a technical detail: it is an admission that nobody has yet settled who sells, who is accountable and where the card goes.
Second reading: investors celebrated the wrong thing. When OpenAI pulled back, OTA shares rose, as if the danger had passed. The sharpest analysis of the moment (Skift, March 2026) argues the opposite: the threat was never the transaction but control of discovery — the phase where the AI decides which options the traveller sees before reaching any website. The supporting figure: extensive use of AI for trip planning jumped from 13% to 30% in a single year, from 2024 to 2025 (Skift Research survey, published by McKinsey in November 2025). While OpenAI withdrew from payments, Google advanced precisely on that layer. And the proof of where the money is came from OpenAI itself: half a year after giving up the transaction, its ads have stopped being a test and reach 31 European countries this week, Spain included. It does not charge for the booking; it charges for the moment the traveller decides.
Third reading: two philosophies are competing. On one side, settling inside other people's platforms: the Booking, Expedia or Accor apps in ChatGPT, the Google AI Mode partners. On the other, building your own AI with your own data — like Booking's declared strategy of developing agents across all its brands while simultaneously partnering with OpenAI, Anthropic, Google and Amazon: cooperating with those who could disintermediate you. Neither has won, and Skift's July 2026 test — chatbots ignoring the very apps users connected — shows that even "in-chat" distribution doesn't yet work reliably.
And on 7 August 2026 Google confirmed a limited test in the United States of agent-assisted hotel booking inside AI Mode. It is worth reading precisely, because almost nobody does: it is a test running on a small share of traffic, Google has not clarified whether payment completes without leaving its search engine, and its own documentation keeps the partner as merchant of record. Five months after OpenAI stepped off, the one still moving towards the transaction is Google — but it has not arrived yet.
What a small business should watch
For an independent hotel, an agency or a mid-sized tour operator, following this timeline is not a curiosity exercise. Three practical takeaways:
- Discovery is the new first page of Google. Before investing in anything transactional, find out what the assistants say about your business today when someone asks about your destination or category.
- Precedents matter. "Book on Metasearch" died after a decade over trust barriers that agentic booking inherits intact. This wave's promises should be evaluated against that record, not against the enthusiasm of the moment.
- Volatility is the norm. The ecosystem changed three times in nine months. Any investment decision tied to a specific platform should assume that platform may pivot twice before your project pays off.
The story of these nineteen months is not about machines booking flights. It is about who keeps the traveller's conversation. And that game has only just begun.
