United Blocks AI Agents From Booking Flights Over Security Fears

United Airlines said Wednesday that it will not allow AI agents to book flights for its customers, becoming the latest carrier to shut automated intermediaries out of the purchase path. CEO Scott Kirby framed the decision as a privacy and security issue — and as a fight over who owns the customer relationship, according to The Wall Street Journal.

In Kirby's view, AI agents are middlemen that keep the airline from dealing with its travelers directly. The airline also flagged a regulatory problem: AI agents may be unable to meet FAA requirements, such as confirming that checked bags don't contain explosives.

What can AI agents still do on United?

The ban stops short of a full block. Agents such as Muse and Dots can still browse United's website, compare fares and lay out options for users to choose from. They just can't complete the purchase. Anyone hoping to have an AI agent book a holiday flight on United will have to finish the transaction the old-fashioned way.

That distinction matters for the fast-growing field of AI shopping assistants. Browsing and recommendation remain open territory; payment does not. The rule effectively forces a handoff at the moment of sale, where airlines collect passenger data and satisfy security obligations.

Why is United acting now?

United says AI agents haven't driven many bookings so far. The ban, in other words, isn't a response to a flood of bot traffic today — it's mostly about where air travel is headed. By drawing the line early, United positions itself before automated booking scales up and intermediaries build a habit-forming grip on travelers.

The move also sets United apart from its two largest competitors. Delta and American have both signaled that agents can book flights under certain circumstances. That split gives the industry three diverging postures toward AI-mediated commerce: outright prohibition at United, conditional acceptance at Delta and American, and the emerging gray zone in between.

What's at stake for airlines and AI startups?

The core tension Kirby identified is control of the customer relationship. When an AI agent handles the booking, the airline loses direct contact with the traveler — data, preferences and the chance to sell upgrades, seats and loyalty programs on its own terms. Middlemen historically extracted margin and loyalty in exchange for distribution; Kirby is refusing that trade before it starts.

Security adds a second layer. FAA rules require specific attestations in the booking flow, including confirmations about the contents of checked bags. An automated agent that can't legally make those confirmations — such as verifying bags don't contain explosives — can't complete a compliant reservation, according to United's reasoning.

What happens next?

The split among the Big Three U.S. carriers suggests the AI booking question won't settle quickly. If agents like Muse and Dots drive meaningful volume through Delta and American, United will face commercial pressure to revisit its ban. For now, the airline is betting that direct customer relationships and regulatory certainty are worth more than whatever volume AI intermediaries might deliver — and holiday travelers using AI assistants will have to click "buy" themselves.