Travel AI in 2026 is the practice of building production AI for itinerary planning, voice-first booking, concierge support, disruption rebooking, and dynamic pricing copilots, where every fare quote is grounded in live GDS inventory refreshed within 60 seconds and every booking action is two-eye-confirmed before ticketing. Unlike consumer travel apps (Booking.com, Expedia consumer app) which sell to end-travelers, production travel AI runs inside agency, OTA, and corporate-travel infrastructure connected to Amadeus, Sabre, Travelport, or Cytric. Unlike legacy rule-based fare-search interfaces, travel AI uses LLMs over real-time GDS responses to interpret natural-language requests, surface fare-rule constraints, and explain change/refund implications before the traveler commits. Common integrations include Amadeus, Sabre, Travelport, Cytric, the OpenAI Realtime API for voice booking, and Twilio for telephony. Compliance maps to the EU PNR Directive, US DOT Part 399 advertising rules, IATA agency accreditation, and PCI DSS for stored card data.