Route · ONT → ATL · 2020–2025 BTS data
Ontario to Atlanta
The ONT–ATL corridor (Ontario, CA → Atlanta, GA) runs ahead of the national average, served by 2 carriers across roughly 1,900 miles.
Data updated 2026-06-13
- 88.6%
- On-time
- +9.6 pts
- vs US avg
- 77 min
- Delay when late
- 4,905
- Flights
Cancelled
1.3%
Best Month
Jan 2024 98%
Worst Month
May 2024 84%
Distance
1,900 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 88 | 9 | 4 | 0 | DL |
| Nov 2025 | 84 | 9 | 2 | 0 | DL |
| Oct 2025 | 85 | 9 | 0 | 1 | DL |
| Sep 2025 | 77 | 2 | 0 | 0 | DL |
| Aug 2025 | 82 | 3 | 1 | 0 | DL |
| Jul 2025 | 88 | 6 | 1 | 2 | DL |
| Jun 2025 | 84 | 9 | 2 | 2 | DL |
| May 2025 | 81 | 7 | 0 | 0 | DL |
| Apr 2025 | 77 | 11 | 1 | 0 | DL |
| Mar 2025 | 62 | 8 | 0 | 0 | DL |
| Feb 2025 | 56 | 3 | 0 | 0 | DL |
| Jan 2025 | 66 | 6 | 4 | 0 | DL |
| Dec 2024 | 88 | 3 | 0 | 0 | DL |
| Nov 2024 | 77 | 3 | 0 | 0 | DL |
| Oct 2024 | 84 | 8 | 0 | 0 | DL |
| Sep 2024 | 80 | 3 | 0 | 1 | DL |
| Aug 2024 | 85 | 6 | 0 | 0 | DL |
| Jul 2024 | 82 | 9 | 9 | 1 | DL |
| Jun 2024 | 87 | 6 | 0 | 1 | DL |
| May 2024 | 79 | 13 | 0 | 0 | DL |
| Apr 2024 | 72 | 7 | 0 | 0 | DL |
| Mar 2024 | 62 | 2 | 0 | 0 | DL |
| Feb 2024 | 58 | 4 | 0 | 0 | DL |
| Jan 2024 | 63 | 1 | 0 | 0 | DL |
Cancellation Rate
1.3%
24 of 1,847 flights
Diversion Rate
0.4%
8 of 1,847 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ONT - Ontario
Full on-time, delay-cause, and seasonal performance for Ontario, CA.
Origin airport →ATL - Atlanta
Full on-time, delay-cause, and seasonal performance for Atlanta, GA.
Destination airport →Compare the two airports
See ONT and ATL side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to ONT–ATL.
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What the Data Says About ONT to ATL
Ontario to Atlanta (ONT to ATL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88.6% on-time rate across 4,905 flights, with delays that do happen averaging 76.8 minutes. The corridor runs roughly 1,900 miles and is served by 2 carriers. Over the most recent 24 months, 24 of 1,847 flights were cancelled (1.3%) and 8 diverted (0.4%).
Monthly performance varies moderately here: Jan 2024 was the strongest month at 98% on-time versus May 2024 at 84%, a 15-point difference.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.