What terminal is Southwest Airlines at Ontario Airport CA ?

What terminal is Southwest Airlines at Ontario Airport CA ?

Travel blogger

What terminal is Southwest Airlines at Ontario Airport CA ?Terminal 4 Ontario Airport supervises the flying of Southwest flights. With the help of the office staff at the Southwest Airlines Ontario Airport terminal, travelers can manage their trip tickets; they can request itinerary adjustments and other flight-related services and amenities.
Alternatively, travelers can view their reservations on the airline's website or mobile app and make any necessary modifications, as well as add or delete perks and services.

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