United Airlines blocks AI booking agents: 3 reasons the move matters beyond travel

United Airlines is prohibiting personal AI assistants from buying tickets through its reservation systems, the carrier confirmed on Wednesday in a report from The Wall Street Journal. The decision makes United the first large US airline to openly resist agentic commerce — the practice where artificial intelligence tools perform tasks on behalf of a user rather than merely responding to queries.

United outlined three concerns. Third-party agents could put customers’ private data at risk. They might complete purchases that users did not authorise. And automated actions could violate Federal Aviation Administration and Transportation Department rules regarding what airlines are required to show passengers. An AI agent, for instance, cannot confirm at check-in that a bag contains no prohibited items. Agents will still be permitted to view United’s flight options and ticket prices, but they will be blocked from finishing a purchase on the airline’s site.

A commercial incentive also exists. Chief Executive Scott Kirby — who has described AI as potentially transformative — stated on Tuesday that he has no interest in creating another intermediary. Airlines have spent considerable effort contending with online travel agencies over how their fares were presented and sold. An AI agent that compares prices and books on a user’s behalf could undermine the direct customer relationships that carriers have laboured to rebuild.

United is not the only company taking such a stance. Amazon filed a lawsuit against Perplexity in November 2025 to prevent its Comet browser agent from making purchases on Amazon’s platform, and later secured a court order that temporarily barred it. Other airlines have adopted a different approach. Delta permits verified AI assistants to complete bookings, with additional protections for sensitive itineraries such as those involving unaccompanied minors. American allows some agents to purchase tickets via specific partners.

For now agent-related transaction volumes remain negligible. United reported that it is not observing many bookings from AI agents. Uber said that over Halloween week AI agents generated just 500 Uber Eats orders and four rides out of roughly 320 million total trips. The broader question is what happens if more major merchants follow United and Amazon. AI developers are betting that agents will become a new purchasing channel. Those developers include OpenAI, which this week acquired travel-booking startup Odessia, and Meta, which says travel planning is a leading use case for its Muse agent. If large sellers restrict agents to browsing only, that pathway to generating revenue from AI grows narrower, and the companies that control the customer relationship retain the advantage.

This is a minor story for United’s financial results, but a notable signal for the AI monetisation theme. Agentic commerce — where AI tools purchase on a user’s behalf — is one of the primary ways AI developers hope to turn assistants into revenue generators. Every large merchant that limits agents to browsing makes that goal harder. The timing is significant, with Nvidia’s earnings and Anthropic’s market debut both due next week, and investors already testing how much AI revenue is implied in current valuations. If restrictions spread across airlines, retail and banking, merchants with strong direct channels would protect their customer data, pricing power and advertising reach, while AI platforms would be pushed toward partnership deals rather than open access.