Biggest Hotels in Ontario

The biggest hotels you can book in Ontario have room counts in the hundreds. DoubleTree by Hilton Ontario Airport leads the list with 482 rooms, followed by Delta Hotels by Marriott Ontario Airport at 299 rooms and Residence Inn by Marriott Ontario Airport at 200 rooms. These properties offer the capacity to accommodate large groups, multiple teams, or extended stays under one roof.

Start with room count to confirm the property can handle your group size, then compare rates, location relative to your meeting sites or the airport, and amenities that matter for your trip. On Engine you can search and compare these hotels side by side, filtering by the features your team needs. Pre-negotiated rates and consolidated invoicing make it easier to evaluate total cost across a large booking.

Yes. For a stay of 9 or more rooms, Engine Groups handles the booking; for 8 rooms or fewer, you book self-serve on the platform. The biggest hotels in Ontario have the capacity to support sizable groups, and Engine offers consolidated invoicing and multiple payment options to simplify the process.

These hotels work for both. While their size makes them a natural fit for large groups or events, individual business travelers benefit from the same capacity, amenities, and often proximity to Ontario International Airport. Anyone on your company's Engine account can search and book at these properties, whether traveling alone or with a team.

A bigger hotel offers the capacity to keep an entire team or multiple travelers under one roof, which simplifies coordination and can reduce ground transportation costs. Many of the largest properties are near the airport serving Ontario, shortening commutes, and their size often means more on-site amenities and flexible space for informal meetings. For group travel, that concentration can make logistics and billing much easier.