5W index says AI citations now shape travel booking decisions

Travel discovery is moving from search results pages into AI recommendation layers, and 5W’s latest index argues that the real competition is no longer for destination keywords alone. Released on May 27, the Airlines & Hotels AI Visibility Index 2026 says more than a third of U.S. travelers now begin product research with an AI engine instead of Google, a shift that pushes brand selection earlier in the booking funnel, before a traveler ever sees a traditional search result.

The study sits inside 5W’s broader AI Visibility Index series, which the agency says tracks how more than 400 brands get cited across ChatGPT, Claude, Perplexity, Gemini and Google AI Overviews. For the travel installment, 5W measured roughly 50 airline and hotel brands against 60-plus traveler queries in Q2 2026, with each prompt run five times per engine. The company also says its annual flagship airlines study ranks 24 carriers, underscoring how closely it is watching citation share as a new proxy for shelf space in travel planning.

On 5W’s ranking, Delta led citation share at 10.5 percent, followed by Marriott at 10.0 percent and Hilton at 8.5 percent. United followed at 7.5 percent, American at 6.5 percent, Southwest at 5.5 percent, Hyatt at 4.2 percent, Airbnb at 3.8 percent, Booking.com at 3.3 percent, IHG Hotels & Resorts at 2.8 percent, JetBlue at 2.4 percent, Expedia at 2.1 percent, Alaska at 1.9 percent, Wyndham at 1.6 percent and Four Seasons at 1.4 percent. The headline contrast is stark: 5W says American Airlines flies the most seats, but Delta wins the answer. Wyndham runs the most U.S. hotels, but Marriott and Hilton win the answer.

That logic fits a wider shift that other travel researchers have been documenting. Deloitte’s 2026 Travel Industry Outlook said nearly a quarter of travelers reported using generative AI tools for trip planning in late 2025, triple the share in 2022. Phocuswright reported that 56 percent of travelers used AI for planning, booking or in-destination assistance for at least one trip in the past 12 months, up from 43 percent in the second half of 2025 and 33 percent in the first half. It also found that more than half of U.S. travelers have tried GenAI and one in three already uses it for travel-related purposes.

For airlines and hotel groups, the message is plain: the visibility fight has moved upstream. Trusted content, structured business information, review signals and third-party references now matter not just for ranking, but for being cited at all. In a market where AI systems are narrowing options to a handful of brands, citation share has become the new gatekeeper inside the booking decision itself.