Delta Hotels by Marriott Ontario Airport Location: Ontario, California Total Meeting Space: 25,000+ square feet Total Event Rooms: 5 Largest Room Capacity: 491 guests The Delta Hotels by Marriott Ontario Airport is a premier meetings and events destination in Southern California, purpose-built for productivity and scale. With more than 25,000 square feet of flexible meeting space, the hotel supports a full spectrum of events, from executive board meetings and corporate trainings to multi-day conferences and large-scale gatherings. Key Event Features Five versatile event rooms Largest space accommodates up to 491 attendees State-of-the-art audiovisual technology High-speed, reliable internet connectivity Ergonomic seating and professional room layouts Seamless on-site event coordination Designed for efficiency and impact, each space is equipped with modern AV capabilities and dependable connectivity to ensure presentations, hybrid meetings, and live-streamed events run without interruption. Why planners choose this venue: The combination of scalable space, advanced technology, and strategic Ontario Airport access makes it an ideal choice for regional and national meetings.