🇺🇸
ONT Airport - Ontario International Airport
Ontario, United States. Departures peak at 06:00 local, averaging 20.9 flights per hour.
Window: last 60 days. Last refreshed: 2026-08-12. Schedule coverage: 21 days observed.
Peak departure hour
06:00
20.9 flights/hr
Quietest active hour
04:00
1.9 flights/hr
Traffic score
88/100
Relative volume
Departures by hour (local time)
Avg per day, last 60 daysTotal: 167.5 avg departures per day.
Weekday vs weekend departure pattern
Weekday avg per hour
Weekend avg per hour
Arrivals by hour (local time)
Avg per day, last 60 daysPeak arrival hour: 22:00 local (17.5 flights/hr). Total: 159.3 avg arrivals/day.
Top airlines
- 1. Southwest Airlines (WN) 500
- 2. United Parcel Service Company (UPS) (5X) 242
- 3. Alaska Airlines, (AS) 186
- 4. American Airlines (AA) 140
- 5. Delta Air Lines, (DL) 139
Top destinations
- 1. 🇺🇸 Seattle (SEA) 274
- 2. 🇺🇸 Dallas-Fort Worth (DFW) 245
- 3. 🇺🇸 Denver (DEN) 159
- 4. 🇺🇸 Phoenix (PHX) 153
- 5. 🇺🇸 Salt Lake City (SLC) 127
Frequently asked
- What's the busiest hour for departures at ONT?
- Departures from Ontario International Airport peak at 06:00 local time, averaging 20.9 flights per hour over the past 60 days.
- What's the quietest hour to fly out of ONT?
- The quietest hour with regular service is 04:00 local time, averaging 1.9 flights per hour.
- Which airline operates the most flights from ONT?
- Southwest Airlines (WN) is the largest operator at Ontario International Airport, with 500 observed departures in the past 60 days.
- What's the most popular destination from ONT?
- Seattle (SEA) is the most-flown destination, with 274 observed departures in the past 60 days.
Tracking a flight through ONT?
Forward your booking and TripWaffle alerts you to gate changes, delays, baggage carousels, and security wait spikes - so you don't have to keep refreshing.
Get realtime alerts
Free to start. No card required.