ONT Today
Clean day. Departures at 90%, arrivals better at 100%. Early morning flights ran 19 points better than afternoon. Fly 5am - 9am if you can. That window has been running at 85%.
What This Means for You
Good day to fly from ONT. 90% of departures are on time. Your flight will probably leave on schedule. Normal operations.
If you can choose your departure time: early morning flights (5am - 9am) run at 85%. Afternoon (3pm - 6pm) drops to 66%. That is a 19-point difference from the same airport on the same day.
Palm Springs International Airport (PSP) is 65 miles away and running 100% today. If your route is available from both airports, PSP is the better bet right now.
ONT Flight Board
Live departures and arrivals at Ontario International Airport.
| Status | Airline | Flight | Destination | Sched | Updated | Gate |
|---|---|---|---|---|---|---|
Pick Your Window
Early Morning vs Afternoon is a 19-point swing at ONT. The early morning block runs at 85%. If you have any say in your departure time, this is the biggest thing you can control.
Through the Day
Morning held up fine at 87%. 3pm is where it broke down, dropping to 57%. Evening is thinning out and improving to 84%. A 43-point swing from best to worst today.
vs Last Week
This week is 7 points better on departures (84% vs 77%). Arrivals roughly the same. Wed was the worst day, Mon the best.
The Bigger Picture
ONT has been bouncing between 67% and 90%. Best day was Aug 23 at 90%. Worst was Aug 6 at 67%. The norm is 76-82%, which is just how ONT runs. Today's 90% is a good day by ONT standards.
About ONT Delays
Ontario International Airport (ONT) is currently running on time with 90% on-time departures and 100% on-time arrivals. This data updates every 15 minutes from FAA sources.
Ontario International Airport has averaged 84% on-time departures this week, making it moderately reliable. Performance varies by time of day and weather conditions.
Ontario International Airport is one of 179 FAA-monitored airports with real-time delay tracking. Data includes departure and arrival on-time percentages, updated every 15 minutes, with historical trends available for the past 90 days.
Nearby alternatives include SNA (John Wayne Orange County International Airport), LGB (Long Beach International Airport) and BUR (Hollywood Burbank Airport). When ONT is experiencing delays, these airports may offer better on-time performance.
Early morning departures from Ontario International Airport typically have the highest on-time rates. Delays tend to accumulate throughout the day as cascading effects from earlier disruptions compound. Check the 24-hour trend chart above for today's pattern.