Yes, there is parking available at the DoubleTree by Hilton Ontario Airport. The hotel offers on-site parking which is open to the public. The price for parking is $20 per day. No reservation is required.

The DoubleTree by Hilton Ontario Airport offers a variety of room types, including Double, Family, and Disability Access rooms. The rooms range in size from 355 sqft to 452 sqft. Smoking is not allowed in any of the rooms. The beds available include King size beds, Queen size beds, and Sofa beds. The rooms can accommodate between 3 and 6 adults, and 2 and 4 children.

Guests at the DoubleTree by Hilton Ontario Airport can enjoy a variety of leisure amenities during their stay. They can spend time swimming and relaxing by the outdoor swimming pool, which is heated and offers beautiful views. The pool is for adults only, providing a peaceful and quiet atmosphere. Additionally, guests can unwind in the hot tub or Jacuzzi, or lounge on beach chairs or under beach umbrellas.

For dining options, the hotel offers two restaurants. Guests can dine at Citrus West, which serves delicious American cuisine. There is also Porter's Prime Steak House, which offers a family-friendly, traditional, and romantic ambiance along with American dishes.

In terms of entertainment, the hotel provides live music performances, evening entertainment, and a nightclub with a DJ. Guests who enjoy outdoor activities can explore the nearby hiking trails. Lastly, the hotel features a fitness center and a business center for guests' convenience.

There are two restaurants available at DoubleTree by Hilton Ontario Airport. The first is Citrus West, which serves American cuisine. The second is Porter's Prime Steak House, which offers a variety of American cuisines and has a family-friendly, traditional, and romantic ambiance.

At DoubleTree by Hilton Ontario Airport, cash is not accepted as a method of payment. However, they do accept various credit cards including Diners Club, JCB, American Express, Discover, Visa, and Mastercard.