United Airlines now bans AI agents from booking, changing or servicing its tickets. The rule is in a contract of carriage revised on Nov. 11, and it reaches AI agents working through travel agencies too. United can cancel a reservation an agent made, though AI tools may still show you its flights and fares.
That matters to anyone who planned to hand trip booking to a chatbot or an AI-enabled browser this season. You can still research with AI. A human has to make the purchase, on United’s site or through a person at an agency.
The clause United added on Nov. 11
Every ticket buyer accepts the contract of carriage. In the version revised Sept. 30, 2026, archived on Oct. 17, Rule 6’s list of prohibited practices has six entries.
They cover hidden-city ticketing, throwaway tickets, back-to-back tickets, dodging fare rules such as stayover requirements, and fraud. The sixth is a catch-all for “any practice that United believes, in its sole discretion, is exploitative.” AI does not appear in the list.
The current contract, headed “revised November 11, 2026,” slots a new item in sixth place, Rule 6.J.6, as View from the Wing reported. It bans “the use of AI Agents to make, modify or service a Ticket, and/or to purchase any service or product.”
The definition is broad. It covers “any software or service” that “takes autonomous or semi-autonomous action,” including AI assistants and AI-enabled browsers, to “discover, search for, book, purchase, ticket, service or manage” anything United sells.
Supervision is no defense. The rule applies “whether or not Passenger or another individual supervises or approves its actions.” It also names AI assistants built into social media, messaging and search apps, and any that reach United through a travel agency’s tool.
Rule 5 now adds “reservations made, modified or serviced by AI Agents” to the bookings United says it will cancel without notice. Rule 6’s existing remedies range from voiding tickets to closing MileagePlus accounts. Tickets bought before the change stay under the earlier text, as PPC Land noted, because Rule 3 applies the contract “in effect on the date on which the Ticket is issued.”
Before this, a United spokesperson pointed TechCrunch to its website terms of use in October. They bar “any robot, spider, other automatic device, or manual process” used to “monitor or copy this website.” That targets scraping; the new rule targets buying.
The reasons United gives
United framed the change as customer protection in a Nov. 11 announcement titled “United Restricts Access for Third-Party AI Agents.” “Sharing account credentials with personal, third-party, AI assistants can expose sensitive information,” it says. Agent actions “may result in unintended purchases, account changes, or use of MileagePlus miles.” It says it is restricting “unauthorized, third-party personal AI agents,” and that banks and retailers have taken similar steps.
That warning applies to any account you hand to software, as we noted in our guide to protecting crypto wallets after the Binance hack.
United also says the agents’ actions could break FAA and DOT rules. Its example is check-in, where a person must confirm their bags hold no banned items. The federal rule behind that is 49 CFR 175.25. Passengers who buy tickets or check in on their own must acknowledge its hazardous-materials notices.
There is also a business reason, and United’s CEO said it out loud. Scott Kirby spoke at a Chicago event on Tuesday, as reported by The Wall Street Journal and quoted by View from the Wing. “To be honest, I don’t want to create another middleman,” he said.
Airlines spent years fighting online travel agencies over who controls how fares are shown. A chatbot that books for millions of people would be a new gatekeeper of that kind.
Gary Leff of View from the Wing questions the regulatory argument. He argues the hazmat rule requires an acknowledgment, not that a human complete every booking step. He also points out that “a contractual ban isn’t a technical one.”
United told the Journal it isn’t seeing many agent bookings, investingLive reported. Leff notes United says its systems can identify where a booking came from.
Which AI tools this covers
United’s rule names no company. It covers a type of software: assistants and AI browsers that act on a user’s behalf. PPC Land lists products in that category. They include Google’s AI Mode and Chrome auto browse, OpenAI’s ChatGPT, Meta’s Muse and Perplexity’s Comet.
None of those companies has commented publicly on United’s rule, as far as we could find. Meta’s view on agent blocking in general is on record.
Meta told TechCrunch in October, after Amazon began blocking Muse: “Turning away a personal agent means turning away the customer behind it.” Meta also says travel planning is a top use for Muse, according to investingLive.
Trust is the open question with these tools at work, too. One study found managers trust employees who use ChatGPT less.
Delta, American and Southwest are taking other routes
United is the first major US airline to publicly resist AI agents buying tickets. That is according to investingLive’s summary of the Journal’s report. Its rivals are moving differently.
Delta lets authenticated AI assistants complete bookings, investingLive reported, citing the Journal. It adds checks on sensitive trips such as unaccompanied minors.
Delta was more cautious in October. It told TechCrunch it had no “partnership or integration that enables a third-party AI agent” to book on its platforms.
American says some agents can buy tickets through certain partners, according to the same report.
Southwest built its own channel instead. On Oct. 6 it launched a plugin inside ChatGPT, built with OpenAI and Amazon Web Services, Dallas Innovates reported. You can compare Southwest fares in a chat, but payment still happens on Southwest.com.
How to book United now
Most travelers won’t notice a change. AI chatbots and other agents can still show United flights and prices. That is the Journal’s reporting, as relayed by View from the Wing. The step that has to be human is the purchase and any change after it.
The safe routes are united.com, the United app and United’s phone agents. A human travel agent works too, as does an online agency where you check out yourself.
Fares will stay easy to compare, travel analyst Henry Harteveldt of Atmosphere Research Group told CBS MoneyWatch. He said United fares remain available through sites such as Kayak, Hopper and Google Flights.
Award-search tools are a gray area. One Mile at a Time‘s Ben Schlappig argues the definition’s “discover, search for” wording could reach them. United hasn’t said it will act against them.
If an AI agent booked a United trip for you, check that the reservation is still active. The rule applies to tickets issued from Nov. 11, and United hasn’t said publicly whether it will review older bookings.
