Airport gate intelligence · ONT
How many gates does Ontario Airport (ONT) have?
Ontario Airport (ONT) has 27 gates, with about 80 airline departures a day. Southwest has the most (6), followed by American (4).
Southwest flies 40% of the 12,408 seats leaving ONT each day. Southwest has 50% more gates and 213% more seats than American. 1 gate is common use, shared by several airlines.
Gates, seats and flights by airline at ONT
| Airline | Gates held | Departures a day | Seats out a day | Share of seats | Seats per departure | Regional jets | Median turn | Tows a week |
|---|---|---|---|---|---|---|---|---|
| Southwest | 6 | 30 | 4,924 | 40% | 162 | 0% | 50 min | 12 |
| American | 4 | 9 | 1,572 | 13% | 175 | 4% | 60 min | 0 |
| United | 3 | 7 | 1,169 | 9% | 159 | 9% | 68 min | 16 |
| Delta | 3 | 9 | 1,098 | 9% | 122 | 44% | 55 min | 9 |
| Frontier | 2 | 8 | 1,594 | 13% | 199 | 0% | 65 min | 0 |
| Alaska | 2 | 9 | 1,262 | 10% | 135 | 39% | 60 min | 0 |
| JetBlue | 1 | 1 | 140 | 1% | 140 | 0% | 75 min | 0 |
| Volaris | – | 3 | 522 | 4% | 224 | 0% | 106 min | 0 |
| OO | – | 2 | 127 | 1% | 76 | 100% | 54 min | 0 |
| Common use (shared) | 1 | |||||||
Average of 3 full days, Oct 3 to Oct 5, 2026. Gates held = the airline flying the gate most (regional partners count as their brand); 5 gates have too few flights yet. Seats are capacity, from each airline’s seat map per aircraft type; 2% of flights have no seat count yet.
On-time departures by airline at ONT
82% of departures left the gate on time (less than 15 minutes after their scheduled time). Airlines with 10+ departures a day.
| Airline | Departures a day | On time | 15+ min late |
|---|---|---|---|
| Southwest | 30 | 75% | 25% |
On time = left the gate less than 15 minutes after its scheduled time. Average of 3 full days.
What size aircraft ONT’s gates handle
Gates by the largest aircraft seen there at least twice. A gate that takes a wide-body also takes anything smaller.
Airlines at ONT: terminals, gates and nonstop routes
Other airlines
Seen on only one of the full days collected (charters and occasional flights): EM (3 flights); Avianca El Salvador (2 flights to San Salvador); 5E (1 flight); I9 (1 flight); KH (1 flight); Sun Country (1 flight).
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ONT gate questions
How many gates does Ontario Airport (ONT) have?
Ontario Airport (ONT) has 27 gates, with about 80 airline departures a day. Southwest has the most (6), followed by American (4).
Which airline has the most gates at Ontario Airport (ONT)?
Southwest, with 6 of the 27 gates at ONT (the airline flying each gate most; regional partners count as their brand).
How many flights a day leave Ontario Airport (ONT)?
About 80 airline departures a day (Oct 3 to Oct 5, 2026).
Which terminal is Southwest in at ONT?
Southwest flies from Terminal 4 at Ontario Airport (ONT).
How many gates does Southwest have at ONT?
6 gates, with about 30 departures and 4,924 seats a day.
How many gates does American have at ONT?
4 gates, with about 9 departures and 1,572 seats a day.
How many gates does United have at ONT?
3 gates, with about 7 departures and 1,169 seats a day.
How many seats leave ONT each day?
About 12,408 seats on 80 airline departures a day (average of 3 full days, Oct 3 to Oct 5, 2026).
What is the typical turn time at ONT?
59 minutes at the gate from arrival to departure (median of every turn measured).
Which airline leaves ONT on time most often?
Southwest Airlines: 75% of its departures left the gate less than 15 minutes after their scheduled time, against 82% for all airlines at ONT (3 full days, Oct 3 to Oct 5, 2026).
How many aircraft tows happen at ONT?
About 37 tows a week: a plane that arrives at one gate and leaves from another was towed between them. Planes we didn't see arrive aren't counted.