How many terminals are at Ontario Airport ?

Description

Ontario Airport terminals are: Terminal 2, Terminal 4, and the International Arrivals Facility.
Terminal 2 is the largest terminal and handles most international flights. It has 18 gates, including 2 arrival-only gates.
Terminal 4 is the smallest terminal and handles most domestic flights. It has 8 gates.
The International Arrivals Facility is a separate facility located next to Terminal 2. It has 2 arrival-only gates and is used to process international arrivals.
ONT is currently planning to expand Terminal 2 and build a new Terminal 3. The expansion of Terminal 2 will add 10 gates, bringing the total number of gates in the terminal to 28. The new Terminal 3 will have 12 gates and will be used to handle both international and domestic flights.