Four star rating

DiamondOnyx Hotel & Resort

Experience refined hospitality on the Canadian side of Niagara Falls. DiamondOnyx is a 4-star hotel and entertainment resort where elegant rooms, riverside dining and genuine service come together for a memorable stay in Ontario.

Perfectly located minutes from the Falls, the promenade and Clifton Hill, our resort is the ideal base for a short break or a longer escape. Wake up to skyline views, unwind in our spa, and dine at our signature restaurant before an evening in our adults-only entertainment lounge.

From the moment you arrive, our team looks after every detail — spacious suites, thoughtful amenities and a warm Niagara welcome. Book directly through this website for our best available rate and best conditions. We look forward to hosting you at DiamondOnyx.

Stay

Rooms & Suites at DiamondOnyx

Book your stay
Classic Queen Room
More information
Room · from C$189 / night

Classic Queen Room

A comfortable retreat with a plush queen bed, rainfall shower and city views — ideal for a relaxed getaway for two.

More about this room
Deluxe King Room
More information
Room · from C$239 / night

Deluxe King Room

Extra space, a king bed and a seating area with floor-to-ceiling windows overlooking the Niagara skyline.

More about this room
Fallsview Studio
More information
Popular
Studio · from C$289 / night

Fallsview Studio

An open-plan studio with a kitchenette and a private balcony — the perfect spot to take in the views of the Falls.

More about this room
Junior Suite
More information
Suite · from C$339 / night

Junior Suite

A bright suite with a separate lounge, premium bedding and a spa-style bathroom for a truly restful stay.

More about this room
Executive Suite
More information
Suite · from C$429 / night

Executive Suite

A spacious one-bedroom suite with a dining area, walk-in shower and panoramic corner views over the city.

More about this room
DiamondOnyx VIP Suite
More information
Signature · from C$599 / night

DiamondOnyx VIP Suite

Our finest accommodation: two rooms, a lounge, premium minibar and dedicated concierge service for VIP guests.

More about this room
Resort

Everything under one roof

Restaurant and bar
Dining

Restaurant & Bar

The Onyx Grill and The Diamond Lounge serve modern Canadian cuisine, local wines and signature cocktails.

Spa and wellness
Wellness

Spa & Wellness

Unwind with a treatment, sauna and relaxation lounge designed to restore body and mind.

Indoor pool and fitness
Leisure

Pool & Fitness

A heated indoor pool and a modern fitness studio, open to all resident guests throughout the day.

Gaming lounge
Entertainment

Casino Hall

An adults-only gaming lounge on-site with slots and table games for guests aged 19 and over.

Events and meetings
Events

Events & Meetings

Four flexible event spaces for weddings, conferences and celebrations, with full catering and AV support.

Concierge and transfers
Service

Concierge & Transfers

Our concierge arranges tours, tickets, dining and airport transfers to make every stay effortless.

168
Rooms & suites
11
Years of hospitality
240,000+
Guests welcomed
★★★★
Four-star comfort
The Onyx Grill restaurant
Dining

The Onyx Grill & The Diamond Lounge

Our signature restaurant, The Onyx Grill, celebrates seasonal Ontario produce, prime cuts and fresh Great Lakes fish, paired with a curated list of Canadian wines. Enjoy a relaxed breakfast, a leisurely lunch or a candle-lit dinner with skyline views.

Next door, The Diamond Lounge pours craft cocktails, local beer and late-night bites in a warm, contemporary setting — the perfect place to start or end your evening at the resort.

Reserve a table
Adults-only gaming lounge
Entertainment

The Casino at DiamondOnyx

Right here at the resort you'll find a dedicated adults-only entertainment area. Our gaming lounge features a lively floor of slots and electronic games alongside classic table games — blackjack, roulette and poker — plus a relaxed sportsbook lounge and a high-limit area for our VIP guests.

Access is available on-site for hotel guests aged 19 and over. Our hosts are on hand to make you feel welcome, whether you're here to unwind after dinner or enjoy an evening with friends.

Explore the gaming lounge Responsible Gaming

Please play responsibly. Support is available 24/7 — ConnexOntario: 1-866-531-2600.

Offers

Promotions & packages

View all offers
Stay and Dine Package
Package

Stay & Dine — overnight with a three-course dinner for two

More information
Fallsview Getaway
Seasonal

Fallsview Getaway — two nights with breakfast and late check-out

More information
Spa Escape
Wellness

Spa Escape — overnight stay with a couples treatment

More information
Casino Evening Package
Entertainment

Casino Evening — dinner, an overnight stay and a night at the gaming lounge

More information
Midweek Saver
Value

Midweek Saver — book Sunday to Thursday and save on your stay

More information
DiamondOnyx resort

Guest reviews

Plan your stay
Melissa T.
41, Family
The nicest hotel we have stayed at! Beautiful colours, style and design. Slept wonderfully and had a lovely breakfast with a view of the Falls.
Fallsview Studio
Henry H.
58, Couple
Wonderful days at DiamondOnyx again! Excellent breakfast, very friendly staff, great beds, spotlessly clean and a calm atmosphere. Highly recommended.
Executive Suite
Jordan M.
52, Business
Perfect welcome, excellent rooms and a great location for a work trip. The lounge in the evening was a lovely way to relax.
Deluxe King Room
Booking

Reserve your stay

Leave your details and our reservations team will contact you to confirm availability and rates. We're happy to help with rooms, dining, events or a visit to our gaming lounge.