United bans AI agents from booking your flights

United Airlines has drawn a hard line on AI in travel booking. In a revision to its Contract of Carriage dated November 11, 2026, the airline banned the use of AI agents to book, change or service tickets, one of the clearest moves yet by a major carrier against the new wave of agentic travel tools.

The ban is not a vague warning. It is written into the contract every United passenger agrees to, and it comes with a cancellation power attached.

What the new rule says

The change arrives as a new provision, Rule 6.J.6, in United's Contract of Carriage. It bans "the use of AI Agents to make, modify or service a Ticket, and/or to purchase any service or product."

The scope is deliberately wide. The ban covers bookings made directly through united.com and the United app, and it also reaches agents working through travel agencies, aggregators or any other intermediary. Crucially, it applies even when the customer supervises or approves every step the agent takes. Human oversight does not make an AI-booked ticket acceptable under the new rule.

A companion provision, Rule 5.H, gives United the right to cancel reservations that were made, modified or serviced by AI agents. In other words, the airline can undo a booking it believes an agent touched.

What is still allowed

The ban is about booking, not browsing. AI research and search are still allowed: an agent may show a traveller United flights and prices. The line is drawn at the purchase itself. The customer must complete the booking themselves.

There is also a grandfather clause. Bookings that AI agents made before November 11, 2026 will not be cancelled, so travellers who already used an agent to book are not about to lose their seats.

Why United did it

United's stated reasons centre on security and control. Handing an AI agent your United login means sharing credentials, which the airline says exposes sensitive personal information. There is also the risk of unintended consequences: an agent acting on a traveller's behalf could make a purchase they did not mean to make, change account details, or spend MileagePlus miles without the traveller realising.

The airline also points to potential regulatory conflicts with the Federal Aviation Administration and the Department of Transportation, suggesting that letting autonomous agents transact on a passenger's behalf could collide with rules written for human travellers.

Chief executive Scott Kirby put the commercial logic more bluntly. "To be honest, I don't want to create another middleman," he told The Wall Street Journal, a reference to the industry's long fight over who controls the customer relationship, and the fees that come with it.

Not everyone agrees

The industry is not united on the question. JetBlue president Marty St. George responded on November 12 at the Skift Commerce Summit, saying airlines should follow their customers' lead on AI booking agents, a signal that at least one rival sees agent-led booking as something to accommodate rather than block.

That split matters, because the technology is moving fast. AI agents that can search, compare and book travel are already being built into chatbots and assistants, and travellers are beginning to use them. United's bet is that the risks, security, unintended purchases, lost miles, outweigh the convenience for now.

Why it matters

This is the first time a major US airline has written a ban on AI booking agents directly into its Contract of Carriage, with an explicit right to cancel offending reservations. It turns a question the industry has been debating in the abstract, should machines be allowed to buy tickets for people, into a concrete rule with consequences for passengers.

For travellers, the practical message is simple: you can still use AI to find your flight and compare prices, but when it is time to pay, you will need to do it yourself. For the companies building booking agents, United has just become the hardest airline to work with, and the clearest test case for whether other carriers follow.

What to watch

Watch whether other major carriers copy United's language into their own contracts, or take JetBlue's position and lean into agent-led booking instead. The divide between the two approaches is now public, and the next few months will show which side the industry, and travellers, choose.