Route · SJC → ONT · 2020–2025 BTS data
San Jose to Ontario
The SJC–ONT corridor (San Jose, CA → Ontario, CA) runs ahead of the national average, served by 1 carrier across roughly 333 miles.
Data updated 2026-06-13
- 85.6%
- On-time
- +6.6 pts
- vs US avg
- 55 min
- Delay when late
- 7,922
- Flights
Cancelled
0.3%
Best Month
Nov 2024 94%
Worst Month
Oct 2025 72%
Distance
333 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 118 | 18 | 0 | 0 | WN |
| Nov 2025 | 116 | 14 | 0 | 0 | WN |
| Oct 2025 | 110 | 31 | 0 | 0 | WN |
| Sep 2025 | 107 | 16 | 0 | 1 | WN |
| Aug 2025 | 110 | 17 | 0 | 0 | WN |
| Jul 2025 | 118 | 22 | 0 | 0 | WN |
| Jun 2025 | 115 | 24 | 0 | 0 | WN |
| May 2025 | 123 | 15 | 0 | 0 | WN |
| Apr 2025 | 114 | 12 | 0 | 0 | WN |
| Mar 2025 | 106 | 11 | 0 | 0 | WN |
| Feb 2025 | 91 | 8 | 0 | 0 | WN |
| Jan 2025 | 101 | 8 | 3 | 2 | WN |
| Dec 2024 | 110 | 15 | 0 | 0 | WN |
| Nov 2024 | 110 | 7 | 0 | 0 | WN |
| Oct 2024 | 123 | 15 | 0 | 0 | WN |
| Sep 2024 | 132 | 18 | 0 | 0 | WN |
| Aug 2024 | 134 | 10 | 0 | 0 | WN |
| Jul 2024 | 116 | 21 | 2 | 0 | WN |
| Jun 2024 | 115 | 22 | 0 | 0 | WN |
| May 2024 | 108 | 20 | 0 | 0 | WN |
| Apr 2024 | 104 | 11 | 0 | 0 | WN |
| Mar 2024 | 102 | 22 | 0 | 0 | WN |
| Feb 2024 | 99 | 10 | 1 | 0 | WN |
| Jan 2024 | 110 | 17 | 1 | 0 | WN |
Cancellation Rate
0.3%
7 of 2,692 flights
Diversion Rate
0.1%
3 of 2,692 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SJC - San Jose
Full on-time, delay-cause, and seasonal performance for San Jose, CA.
Origin airport →ONT - Ontario
Full on-time, delay-cause, and seasonal performance for Ontario, CA.
Destination airport →Compare the two airports
See SJC 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 SJC–ONT.
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What the Data Says About SJC to ONT
San Jose to Ontario (SJC to ONT) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.6% on-time rate across 7,922 flights, with delays that do happen averaging 55.4 minutes. The corridor runs roughly 333 miles and is served by 1 carrier. Over the most recent 24 months, 7 of 2,692 flights were cancelled (0.3%) and 3 diverted (0.1%).
The monthly split is wide on this route: Nov 2024 posted the strongest performance at 94% on-time, while Oct 2025 came in at just 72% - a 22-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.