Best Time to Fly OAK to ONT
Oakland to Ontario — month-by-month delay data from the Bureau of Transportation Statistics.
Best month
January
1% on time
Worst month
January
1% on time
OAK → ONT on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
Monthly breakdown
| Month | On-time | Cancel rate | Flights |
|---|---|---|---|
| January | 1% | 0% | 502 |
| February | 1% | 0% | 463 |
| March | 1% | 0% | 521 |
| April | 1% | 0% | 503 |
| May | 1% | 0% | 536 |
| June | 1% | 0% | 492 |
| July | 1% | 0% | 517 |
| August | 1% | 0% | 415 |
| September | 1% | 0% | 408 |
| October | 1% | 0% | 415 |
| November | 1% | 0% | 404 |
| December | 1% | 0% | 399 |
Frequently asked
What is the best month to fly from OAK to ONT?
January has the highest on-time rate at 1% for flights from Oakland to Ontario.
What is the worst month to fly OAK to ONT?
January has the lowest on-time rate at 1%, often due to winter weather.
How often are OAK to ONT flights delayed?
On average, 1% of flights from OAK to ONT arrive on time. That means about 99% experience some form of delay.
Source: Bureau of Transportation Statistics.