Expedia's Hard Lessons Building AI at Scale

Expedia warns that building AI which works once is very different from building AI that lasts. The company argues that velocity without discipline is a liability, and that true scale requires systems that work consistently across teams and use cases over time. As AI evolves from prediction and optimization into reasoning and autonomous action, the stakes rise sharply. Systems making decisions on travelers' behalf demand higher standards of reliability, governance, and accountability — lessons Expedia says it learned through years of applying AI across the full traveler journey.