How Busy Is California Airport Ontario? Avoid Delays

California Airport Ontario, also known as Ontario International Airport (ONT), is a public airport located in San Bernardino County, California, about 35 miles east of downtown Los Angeles. As a major airport serving the Inland Empire region, Ontario Airport experiences a significant amount of air traffic, with over 5 million passengers passing through its terminals in 2020. Understanding the airport's busy periods and taking steps to avoid delays can make a big difference in your travel experience.
Flight Volume and Peak Travel Seasons

Ontario Airport operates with two terminals, with a total of 26 gates and over 120 daily flights. The airport serves as a hub for several major airlines, including American Airlines, Delta Air Lines, and United Airlines, as well as low-cost carriers like Southwest Airlines and Frontier Airlines. Peak travel seasons at ONT typically occur during the summer months (June to August), holidays like Thanksgiving and Christmas, and spring break. During these periods, the airport experiences an increase in flight volume, with an average of 350 daily flights.
Busiest Days and Times
The busiest days at Ontario Airport are usually Mondays, Fridays, and Sundays, with the majority of flights departing between 6:00 AM and 10:00 AM, and 4:00 PM and 8:00 PM. These peak periods are often characterized by longer security lines, crowded terminals, and potential delays. It is essential to plan your travel accordingly, allowing for extra time to check-in, drop off baggage, and clear security.
Day | Average Daily Flights | Busiest Time |
---|---|---|
Monday | 320 | 7:00 AM - 9:00 AM |
Friday | 330 | 5:00 PM - 7:00 PM |
Sunday | 310 | 4:00 PM - 6:00 PM |

Tips to Avoid Delays at Ontario Airport

To ensure a smooth travel experience, follow these expert tips to avoid delays at Ontario Airport:
- Arrive early: Reach the airport at least 2 hours before your scheduled departure time for domestic flights and 3 hours for international flights.
- Check-in online: Take advantage of online check-in and print or download your boarding pass to save time at the airport.
- Know the security rules: Familiarize yourself with the Transportation Security Administration's (TSA) rules and regulations to avoid any issues during security screening.
- Consider TSA Precheck or Clear: Enroll in TSA Precheck or Clear to expedite your security process and reduce wait times.
- Monitor flight status: Stay informed about your flight's status, and sign up for flight alerts to receive notifications about any changes or delays.
Additional Services and Amenities
Ontario Airport offers a range of services and amenities to enhance your travel experience, including:
- Free Wi-Fi: Stay connected with complimentary Wi-Fi throughout the airport.
- Restaurants and cafes: Enjoy a variety of dining options, from casual eateries to upscale restaurants.
- Shops and retail: Browse a selection of stores, including newsstands, gift shops, and specialty retailers.
- Airport lounges: Relax in one of the airport's lounges, offering comfortable seating, complimentary snacks and drinks, and shower facilities.
In conclusion, while California Airport Ontario can be busy, especially during peak travel seasons, being aware of the airport's flight volume, busiest days, and times can help you plan your travel more effectively. By following the tips and expert advice outlined above, you can minimize the risk of delays and ensure a smooth, stress-free travel experience.
What are the peak travel seasons at Ontario Airport?
+The peak travel seasons at Ontario Airport are typically during the summer months (June to August), holidays like Thanksgiving and Christmas, and spring break.
How early should I arrive at the airport for my flight?
+It is recommended to arrive at the airport at least 2 hours before your scheduled departure time for domestic flights and 3 hours for international flights.
What services and amenities are available at Ontario Airport?
+Ontario Airport offers a range of services and amenities, including free Wi-Fi, restaurants and cafes, shops and retail, airport lounges, and more.