Ontario Airport Departures

Embarking on a journey from Ontario International Airport (ONT) is a seamless experience, with efficient departures ensuring a smooth start to your travel adventure. Whether you are a seasoned traveler or a first-time flyer, understanding the departure process at ONT can enhance your overall travel experience. Explore the guide to get easy steps of departing procedure for passengers and flight departing from Ontario Airport.

Ontario International Airport (ONT) Flight Departures

Welcome to Ontario International Airport, where your journey takes flight with efficiency and convenience from our departure terminals. Below are the details of flights departing from ONT according to assigned terminals.

Terminal 2

  • American Airlines
  • Delta Air Lines
  • United Airlines

Terminal 4

  • Southwest Airlines
  • Alaska Airlines
  • JetBlue Airways

International Terminal

  • Volaris
  • China Airlines

Ontario Airport Passenger Departure Procedure

Welcome travelers to Ontario International Airport, where seamless departures begin with our efficient Passenger Departure Procedure designed to ensure a smooth and enjoyable journey.


  1. Arrive Early: Aim to arrive at least two hours before your domestic flight and three hours before international departures.
  2. Check for Updates: Stay informed about any changes to your flight schedule through the airline’s website or the ONT Airport app.

Security Screening

  1. Have Documents Ready: Keep your identification, boarding pass, and any necessary travel documents easily accessible.
  2. Follow Security Guidelines: Adhere to security regulations by removing your shoes, jackets, and placing liquids in a clear, quart-sized bag.


  1. Gate Information: Confirm your gate location on the departure screens or through the ONT Airport app.
  2. Priority Boarding: Take advantage of priority boarding if you qualify, ensuring a smoother process.

Ontario Airport Departures epitomize efficiency and passenger-friendly processes, making your journey from ONT a departure experience to remember. From check-in to boarding, ONT ensures a seamless transition from the terminal to the skies.

FAQ for Ontario Airport Departures

How early should I arrive for ONT Airport Departures?

It is recommended to arrive at least two hours before domestic flights and three hours before international flights.

Which airlines operate from Terminal 2 at Ontario International Airport?

American Airlines, Delta Air Lines, and United Airlines operate from Terminal 2.

Is there an International Terminal at ONT Airport?

Yes, there is an International Terminal at ONT, hosting airlines like Volaris and China Airlines.

Are there any specific procedures for the Ontario Airport departure terminal?

Follow standard check-in, security, and boarding procedures based on your airline and terminal.

What airlines depart from Terminal 4 at Ontario International Airport?

Southwest Airlines operates from Terminal 4.