Route · OAK → ONT · 2020–2025 BTS data
Oakland to Ontario
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), OAK to ONT (Oakland to Ontario) ranks #1312 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 86.7%
- On-time
- +7.7 pts
- vs US avg
- 56 min
- Delay when late
- 9,137
- Flights
- #1312 of 4927
- Corpus placement
Cancelled
0.5%
Best Month
Feb 2025 94%
Worst Month
May 2024 77%
Distance
362 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 121 | 27 | 0 | 0 | WN |
| Nov 2025 | 130 | 20 | 4 | 1 | WN |
| Oct 2025 | 136 | 25 | 0 | 0 | WN |
| Sep 2025 | 133 | 17 | 0 | 0 | WN |
| Aug 2025 | 135 | 17 | 0 | 0 | WN |
| Jul 2025 | 134 | 19 | 0 | 0 | WN |
| Jun 2025 | 135 | 21 | 0 | 0 | WN |
| May 2025 | 146 | 17 | 2 | 0 | WN |
| Apr 2025 | 132 | 20 | 0 | 0 | WN |
| Mar 2025 | 136 | 17 | 0 | 0 | WN |
| Feb 2025 | 116 | 7 | 0 | 0 | WN |
| Jan 2025 | 120 | 9 | 2 | 0 | WN |
| Dec 2024 | 126 | 20 | 0 | 0 | WN |
| Nov 2024 | 130 | 10 | 1 | 0 | WN |
| Oct 2024 | 135 | 12 | 0 | 0 | WN |
| Sep 2024 | 132 | 13 | 1 | 0 | WN |
| Aug 2024 | 137 | 16 | 0 | 0 | WN |
| Jul 2024 | 133 | 24 | 1 | 0 | WN |
| Jun 2024 | 131 | 20 | 1 | 0 | WN |
| May 2024 | 132 | 31 | 0 | 0 | WN |
| Apr 2024 | 129 | 18 | 1 | 0 | WN |
| Mar 2024 | 130 | 20 | 1 | 0 | WN |
| Feb 2024 | 112 | 21 | 2 | 0 | WN |
| Jan 2024 | 127 | 17 | 0 | 0 | WN |
OAK–ONT seasonal on-time pattern
Best: February (90.0%) · weakest: December (83.7%)
Strongest calendar month
February
90.0% on-time · ~122 flights/mo
Busiest calendar month
October
~135 flights/mo avg
Weakest calendar month
December
83.7% on-time · ~121 flights/mo
Cancellation Rate
0.5%
16 of 3,128 flights
Diversion Rate
0.0%
1 of 3,128 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
OAK - Oakland
Full on-time, delay-cause, and seasonal performance for Oakland, CA.
OAK on-time profileONT - Ontario
Full on-time, delay-cause, and seasonal performance for Ontario, CA.
ONT on-time profileCompare the two airports
See OAK and ONT side by side on delays, cancellations, and reliability.
Compare OAK vs ONTOrigin-hub reliability standing
Among OAK's stronger departures
OAK → ONT posts a 86.7% on-time rate, landing in the ≥85% band with 10 of 31 BTS-tracked routes leaving Oakland. The same hub also shows 21 mid-band and 0 challenged departures · fleet-wide on-time rank #714 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to OAK–ONT.
Routes with a similar on-time rate
What the Data Says About OAK to ONT
Oakland to Ontario (OAK to ONT) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.7% on-time rate across 9,137 flights, with delays that do happen averaging 55.8 minutes. The corridor runs roughly 362 miles and is served by 1 carrier. Over the most recent 24 months, 16 of 3,128 flights were cancelled (0.5%) and 1 diverted (0.0%).
The monthly split is wide on this route: Feb 2025 posted the strongest performance at 94% on-time, while May 2024 came in at just 77% - a 18-point swing worth factoring into travel timing.
On the multi-year calendar, OAK–ONT peaks in February at 90.0% on-time while October carries the heaviest traffic (~135 flights per month) ; the softest month is December at 83.7%, a 6.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does OAK to ONT rank among US routes by traffic? ▼
How often are flights delayed from OAK to ONT? ▼
What is the cancellation rate for OAK to ONT? ▼
How far is the flight from OAK to ONT? ▼
When is the best time to fly from OAK to ONT? ▼
Airports on this route
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.
Using OAK–ONT data
OAK–ONT runs 7.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare OAK and ONT airport profiles: delay causes and top routes differ even on the same corridor. OAK airport
- If your dates flex, February (90.0% on-time) beats December (83.7%) on this corridor. Seasonal chart
- 4 other routes post a similar 86.7% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.