Route · SFO → ONT · 2020–2025 BTS data
San Francisco to Ontario
The SFO–ONT corridor (San Francisco, CA → Ontario, CA) runs ahead of the national average, served by 12 carriers across roughly 363 miles.
Data updated 2026-06-13
- 84.3%
- On-time
- +5.3 pts
- vs US avg
- 74 min
- Delay when late
- 8,471
- Flights
Cancelled
1.2%
Best Month
Apr 2025 92%
Worst Month
Nov 2025 69%
Distance
363 mi
Carriers
12
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 104 | 27 | 2 | 0 | F9,UA,OO |
| Nov 2025 | 105 | 33 | 2 | 0 | UA,F9 |
| Oct 2025 | 114 | 30 | 0 | 0 | OO,UA,F9 |
| Sep 2025 | 108 | 25 | 0 | 0 | UA,OO,F9 |
| Aug 2025 | 109 | 26 | 1 | 0 | OO,F9,UA |
| Jul 2025 | 104 | 30 | 0 | 0 | OO,UA,F9 |
| Jun 2025 | 104 | 28 | 0 | 0 | OO,UA,F9 |
| May 2025 | 131 | 26 | 0 | 0 | OO,UA,F9 |
| Apr 2025 | 153 | 12 | 0 | 0 | F9,OO,UA |
| Mar 2025 | 118 | 21 | 3 | 0 | OO,UA,F9 |
| Feb 2025 | 105 | 14 | 3 | 0 | OO,UA,F9 |
| Jan 2025 | 101 | 10 | 0 | 2 | OO,UA,F9 |
| Dec 2024 | 140 | 30 | 2 | 0 | F9,OO,UA |
| Nov 2024 | 180 | 44 | 5 | 0 | OO,UA,F9 |
| Oct 2024 | 165 | 14 | 1 | 0 | UA,OO,F9 |
| Sep 2024 | 148 | 28 | 0 | 0 | OO,UA,F9 |
| Aug 2024 | 140 | 26 | 1 | 0 | F9,OO,UA |
| Jul 2024 | 127 | 27 | 4 | 0 | F9,OO,UA |
| Jun 2024 | 86 | 18 | 2 | 0 | F9,OO,UA |
| May 2024 | 92 | 14 | 1 | 0 | F9,OO,UA |
| Apr 2024 | 90 | 24 | 0 | 0 | F9,OO,UA |
| Mar 2024 | 120 | 31 | 1 | 0 | F9,OO,UA |
| Feb 2024 | 98 | 19 | 5 | 1 | F9,OO |
| Jan 2024 | 99 | 18 | 0 | 0 | F9,OO |
Cancellation Rate
1.2%
33 of 2,841 flights
Diversion Rate
0.1%
3 of 2,841 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SFO - San Francisco
Full on-time, delay-cause, and seasonal performance for San Francisco, CA.
Origin airport →ONT - Ontario
Full on-time, delay-cause, and seasonal performance for Ontario, CA.
Destination airport →Compare the two airports
See SFO and ONT side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SFO–ONT.
Routes with a similar on-time rate
What the Data Says About SFO to ONT
Bureau of Transportation Statistics records show San Francisco to Ontario (SFO to ONT) running a 84.3% on-time rate over 8,471 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 73.5 minutes. The 363-mile corridor is served by 12 carriers, and over the last 24 months 1.2% of 2,841 flights were cancelled, 0.1% diverted.
The monthly split is wide on this route: Apr 2025 posted the strongest performance at 92% on-time, while Nov 2025 came in at just 69% - a 24-point swing worth factoring into travel timing.
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.