Route · ONT → OAK · 2020–2025 BTS data
Ontario to Oakland
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ONT to OAK (Ontario to Oakland) ranks #1271 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 87.5%
- On-time
- +8.5 pts
- vs US avg
- 60 min
- Delay when late
- 9,321
- Flights
- #1271 of 4927
- Corpus placement
Cancelled
0.5%
Best Month
Sep 2024 94%
Worst Month
May 2024 76%
Distance
362 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 121 | 25 | 0 | 0 | WN |
| Nov 2025 | 129 | 20 | 3 | 0 | WN |
| Oct 2025 | 136 | 25 | 0 | 0 | WN |
| Sep 2025 | 133 | 12 | 0 | 0 | WN |
| Aug 2025 | 135 | 13 | 0 | 0 | WN |
| Jul 2025 | 135 | 16 | 0 | 0 | WN |
| Jun 2025 | 135 | 23 | 0 | 0 | WN |
| May 2025 | 147 | 14 | 2 | 0 | WN |
| Apr 2025 | 130 | 12 | 0 | 0 | WN |
| Mar 2025 | 136 | 9 | 0 | 0 | WN |
| Feb 2025 | 116 | 9 | 0 | 0 | WN |
| Jan 2025 | 120 | 13 | 1 | 0 | WN |
| Dec 2024 | 125 | 22 | 0 | 1 | WN |
| Nov 2024 | 129 | 14 | 1 | 0 | WN |
| Oct 2024 | 134 | 10 | 2 | 0 | WN |
| Sep 2024 | 132 | 8 | 1 | 0 | WN |
| Aug 2024 | 137 | 10 | 0 | 0 | WN |
| Jul 2024 | 133 | 19 | 1 | 0 | WN |
| Jun 2024 | 131 | 22 | 0 | 0 | WN |
| May 2024 | 131 | 31 | 2 | 0 | WN |
| Apr 2024 | 129 | 26 | 0 | 0 | WN |
| Mar 2024 | 130 | 16 | 1 | 0 | WN |
| Feb 2024 | 116 | 12 | 1 | 1 | WN |
| Jan 2024 | 135 | 12 | 0 | 0 | WN |
ONT–OAK seasonal on-time pattern
Best: February (91.8%) · weakest: December (83.7%)
Strongest calendar month
February
91.8% on-time · ~126 flights/mo
Busiest calendar month
March
~139 flights/mo avg
Weakest calendar month
December
83.7% on-time · ~122 flights/mo
Cancellation Rate
0.5%
15 of 3,135 flights
Diversion Rate
0.1%
2 of 3,135 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.
ONT on-time profileOAK - Oakland
Full on-time, delay-cause, and seasonal performance for Oakland, CA.
OAK on-time profileCompare the two airports
See ONT and OAK side by side on delays, cancellations, and reliability.
Compare ONT vs OAKOrigin-hub reliability standing
Among ONT's stronger departures
ONT → OAK posts a 87.5% on-time rate, landing in the ≥85% band with 10 of 21 BTS-tracked routes leaving Ontario. The same hub also shows 9 mid-band and 2 challenged departures · fleet-wide on-time rank #518 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to ONT–OAK.
Routes with a similar on-time rate
What the Data Says About ONT to OAK
Ontario to Oakland (ONT to OAK) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.5% on-time rate across 9,321 flights, with delays that do happen averaging 59.8 minutes. The corridor runs roughly 362 miles and is served by 1 carrier. Over the most recent 24 months, 15 of 3,135 flights were cancelled (0.5%) and 2 diverted (0.1%).
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 94% on-time, while May 2024 came in at just 76% - a 18-point swing worth factoring into travel timing.
On the multi-year calendar, ONT–OAK peaks in February at 91.8% on-time while March carries the heaviest traffic (~139 flights per month) ; the softest month is December at 83.7%, a 8.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does ONT to OAK rank among US routes by traffic? ▼
How often are flights delayed from ONT to OAK? ▼
What is the cancellation rate for ONT to OAK? ▼
How far is the flight from ONT to OAK? ▼
When is the best time to fly from ONT to OAK? ▼
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 ONT–OAK data
ONT–OAK runs 8.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare ONT and OAK airport profiles: delay causes and top routes differ even on the same corridor. ONT airport
- If your dates flex, February (91.8% on-time) beats December (83.7%) on this corridor. Seasonal chart
- 4 other routes post a similar 87.5% 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.