United Airlines Bans AI Agents From Booking Flights

What happened

The restrictions are written into United's revised Contract of Carriage, dated Nov 11: new Rule 6.J.6 lists "the use of AI Agents to make, modify or service a Ticket, and/or to purchase any service or product" among prohibited ticketing practices, while Rule 5.H gives United the right to cancel affected reservations without notice. The ban covers United's website and app as well as travel agencies and fare aggregators.

United defines AI agents broadly, covering AI assistants, standalone agents and AI-enabled browsers — and the ban applies even when a passenger supervises the agent or approves its actions. The airline says AI tools can still look up flights and fares, but the passenger must complete the purchase; bookings through aggregators such as Kayak, Hopper and Google Flights are unaffected, and reservations made by AI agents before Nov 11 remain valid.

United gives three reasons: handing account credentials to a third-party AI assistant can expose sensitive information; an assistant's actions can lead to unintended purchases, account changes or spent MileagePlus miles; and check-in requires the passenger to personally confirm bags contain no prohibited items, so automated actions could breach Federal Aviation Administration and Department of Transportation rules. Chief Executive Scott Kirby said at a Chicago event that he did not want to create another middleman. United says very little booking activity comes from AI agents so far and its systems can identify it; the airline works with no third-party AI agents yet and plans to build standardized, secure integrations first.

Key facts

1. Effective date: Nov 11, 2026; reservations made by AI agents before Nov 11 remain valid
2. Contract terms: New Rule 6.J.6 bars AI agents from booking, changing or buying tickets; Rule 5.H lets United cancel affected reservations without notice
3. Scope: United's website, app, travel agencies and aggregators; the definition covers AI assistants, standalone agents and AI browsers, even when supervised by the passenger
4. Still allowed: AI tools can look up flights and fares, with the passenger completing the purchase; Kayak, Hopper and Google Flights still take bookings
5. United's reasons: Credential exposure, unintended purchases and mileage use, and automated check-in possibly breaching FAA and DOT rules