The brand an AI engine names is increasingly the brand that gets booked — and a new report from communications firm 5W maps exactly which travel brands win that answer, ranking 25 airlines and hotels by AI citation share. Delta and Marriott lead; some of the category’s biggest names by scale don’t.
Delta Air Lines tops the index with an estimated 10.5 percent share of AI citations, followed by Marriott at 10 percent and Hilton at 8.5 percent. The finding matters for advisors because, as 5W frames it, the buyer journey increasingly runs through prompts like “best airline for international travel” and “best hotel for business” — specific-intent queries that reward consensus over scale.
The report, part of 5W’s AI Visibility Index series, analyzed more than 60 traveler prompts across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews during the second quarter of 2026, running each prompt five times per engine. Citation share reflects how often each brand surfaced across those queries.
The central finding is a decoupling between scale and visibility, sharpest at the two ends of the ranking. American Airlines flies the most domestic seats but ranks fifth by citation share at 6.5 percent, behind Delta, Marriott, Hilton, and United. Wyndham operates roughly 6,400 U.S. hotel locations, more than any other chain, yet lands at 14th with a 1.6 percent share because its value sits in budget franchises travelers do not ask for by name. Marriott, by contrast, pairs the largest room count in the world, about 1.7 million rooms, with the top hotel citation share, winning the answer on loyalty depth and brand consensus.
Rounding out the top 10 are United Airlines (7.5 percent), Southwest Airlines (5.5 percent), Hyatt (4.2 percent), Airbnb (3.8 percent), Booking.com (3.3 percent), and IHG Hotels & Resorts (2.8 percent).
For the booking platforms in advisors’ competitive set, the report flags a squeeze. As AI engines answer travel queries directly and brands push direct booking, 5W identifies the online travel agency layer, including Booking.com, Expedia, and Hotels.com, as the most exposed citation territory in the category.
“American Airlines flies the most seats. Delta wins the answer. Wyndham runs the most hotels in America. Marriott and Hilton win the answer. Scale is not citation share — and in travel, where the buyer journey now runs through ‘best airline for X’ and ‘best hotel in Y,’ the brand AI names is the brand that gets booked. Loyalty programs were built to lock in the customer. The new lock-in is being the default answer,” said Ronn Torossian, founder and chairman of 5W.
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