Route
ATL → ONT
Hartsfield Jackson Atlanta International Airport Ontario International Airport
How punctual is this route?
- On-time arrivals
- 74.2%
- Less than 15 minutes late
- Cancelled
- 1.7%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 934
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 44%
- Late-arriving aircraft 28%
- Air traffic control & airport 22%
- Extreme weather 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 83.1% | 77 |
| October 2025 | 80.0% | 85 |
| November 2025 | 83.1% | 84 |
| December 2025 | 72.6% | 88 |
| January 2026 | 73.3% | 64 |
| February 2026 | 73.2% | 56 |
| March 2026 | 88.3% | 62 |
| April 2026 | 75.6% | 78 |
| May 2026 | 71.4% | 93 |
| June 2026 | 71.8% | 80 |
| July 2026 | 58.6% | 88 |
| August 2026 | 62.8% | 79 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Delta Air Lines | 934 | 74.2% | 1.7% | 57 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
In the news
More headlines →-
City Council backs $55 million in new Hartsfield-Jackson funding as construction projects multiply
The Business Journals ATL
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Over 400 flights cancelled due to severe weather at Hartsfield-Jackson Atlanta International Airport, Georgia
The Watchers - Watching the world evolve and transform ATL
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Hartsfield-Jackson Atlanta International Airport
The Aviation Hub ATL
Headlines found by Google News; stories open on the publisher's site.
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