United Airlines Starts Blocking Flight Purchases by AI Agents
United Airlines will no longer allow AI agents to buy tickets on its site or through third parties, citing privacy risks and aviation regulations.

United Airlines has begun blocking the purchase of airline tickets through AI agents. The carrier announced on Wednesday that it will not permit automated transactions through its systems, whether on its own website or via third-party sites such as aggregators and travel agencies.
Privacy is the main concern, but not the only one. The airline argues that letting an AI assistant complete a ticket purchase could lead to regulatory problems, pointing to possible violations of rules set by the Federal Aviation Administration (FAA) and the US Department of Transportation (DOT).
The check-in example
United's example is check-in: the process requires a human to explicitly confirm that they are not carrying prohibited substances in their luggage. If an AI completes the step without a person involved, it could declare something incorrect and cause an incident at the airport, or worse.
On privacy, the company said: "Sharing account credentials with third-party personal AI assistants can expose sensitive information. In addition, actions taken by these tools could result in unwanted purchases, account changes or the use of MileagePlus miles." United will update its booking policy, as well as its policies for ticket issuance and distribution.
What remains unclear
The official statement does not detail the technical changes the measure will require. It also does not say whether United notified the major AI companies in advance or asked for their help in avoiding violations of the new policies. The start date is unknown, and so is whether other airlines plan similar steps soon.
United notes that sectors such as retail and personal banking have already started blocking AI agents, and it urges more companies to follow so that task automation through agents does not become a nightmare. According to The Wall Street Journal, AI agents will still be able to browse and watch fares on the airline's site, but proceeding to purchase will be fully blocked unless a human is actively behind the screen.
For travelers who have started delegating bookings to AI assistants, the change means a person will have to complete the final step.
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