ONT Today
Decent day, better than the weekly average. Departures at 78%, arrivals worse at 63%. Early morning flights ran 49 points better than afternoon. Fly 5am - 9am if you can. That window has been running at 89%.
What This Means for You
Mostly normal at ONT. 78% on-time means roughly 1 in 5 flights is late. If you have a tight connection, add buffer time. Afternoon departures tend to stack up.
If you can choose your departure time: early morning flights (5am - 9am) run at 89%. Afternoon (3pm - 6pm) drops to 40%. That is a 49-point difference from the same airport on the same day.
Hollywood Burbank Airport (BUR) is 44 miles away and running 82% today. If your route is available from both airports, BUR 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 49-point swing at ONT. The early morning block runs at 89%. 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%. 3pm is where it broke down, dropping to 29%. Evening is thinning out and improving to 63%. A 71-point swing from best to worst today.
vs Last Week
Down 10 points from last week (66% vs 76%). Arrivals down 12 points too. Mon was the worst day, Thu the best.
The Bigger Picture
ONT has been bouncing between 61% and 92%. Best day was May 10 at 92%. Worst was Jun 16 at 61%. The norm is 76-82%, which is just how ONT runs. Today is right in line with the average.
About ONT Delays
Ontario International Airport (ONT) is currently experiencing moderate delays with 78% on-time departures and 63% on-time arrivals. This data updates every 15 minutes from FAA sources.
Ontario International Airport has averaged 66% on-time departures this week, making it frequently delayed. 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.