ONT Today
Clean day, better than the weekly average. Departures at 100%, arrivals worse at 88%. Late morning flights ran 23 points better than afternoon. Fly 9am - 12pm if you can. That window has been running at 87%.
What This Means for You
Good day to fly from ONT. 100% of departures are on time. Your flight will probably leave on schedule. Normal operations.
If you can choose your departure time: late morning flights (9am - 12pm) run at 87%. Afternoon (3pm - 6pm) drops to 64%. That is a 23-point difference from the same airport on the same day.
ONT Flight Board
Live departures and arrivals at Ontario International Airport.
| Status | Airline | Flight | Destination | Sched | Updated | Gate |
|---|---|---|---|---|---|---|
Pick Your Window
Late Morning vs Afternoon is a 23-point swing at ONT. The late morning block runs at 87%. 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 82%. Hit 51% around 12am, peaked at 100% around 5am. Currently at 100%, recovered past the morning. A 49-point swing from best to worst today.
vs Last Week
Down 5 points from last week (76% vs 81%). Arrivals roughly the same. Fri was the worst day, Sun the best.
The Bigger Picture
ONT has ranged from 70% to 89%. Best day was Apr 5 at 89%. Worst was Mar 7 at 70%. The norm is 77-83%, which is just how ONT runs. Today's 100% is a good day by ONT standards.
About ONT Delays
Ontario International Airport (ONT) is currently running on time with 100% on-time departures and 88% on-time arrivals. This data updates every 5 minutes from FAA sources.
Ontario International Airport has averaged 76% 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 US airports with real-time delay tracking. Data includes departure and arrival on-time percentages, updated every 5 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), BUR (Hollywood Burbank Airport), LAX (Los Angeles International Airport) and PSP (Palm Springs International 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.