ONT Today
Clean day. Departures at 86%. Midday flights ran 26 points better than afternoon. Fly 12pm - 3pm if you can. That window has been running at 85%.
What This Means for You
Good day to fly from ONT. 86% of departures are on time. Your flight will probably leave on schedule. Normal operations.
If you can choose your departure time: midday flights (12pm - 3pm) run at 85%. Afternoon (3pm - 6pm) drops to 59%. That is a 26-point difference from the same airport on the same day.
John Wayne Orange County International Airport (SNA) is 30 miles away and running 87% today. If your route is available from both airports, SNA 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
Midday vs Afternoon is a 26-point swing at ONT. The midday 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 83%. Hit 53% around 4pm, peaked at 100% around 5am. A 47-point swing from best to worst today.
vs Last Week
Tracking about the same as last week. Departures at 77%, last week 78%. Arrivals roughly the same. Fri was the worst day, Sat the best.
The Bigger Picture
ONT has been bouncing between 67% and 92%. Best day was May 10 at 92%. Worst was Jun 15 at 67%. The norm is 76-82%, which is just how ONT runs.
About ONT Delays
Ontario International Airport (ONT) is currently running on time with 86% on-time departures and 85% on-time arrivals. This data updates every 15 minutes from FAA sources.
Ontario International Airport has averaged 77% 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.