Best Time to Fly SFO to ORD
San Francisco to Chicago — month-by-month delay data from the Bureau of Transportation Statistics.
Best month
January
1% on time
Worst month
January
1% on time
SFO → ORD on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
Monthly breakdown
| Month | On-time | Cancel rate | Flights |
|---|---|---|---|
| January | 1% | 0% | 1,278 |
| February | 1% | 0% | 1,208 |
| March | 1% | 0% | 1,586 |
| April | 1% | 0% | 1,797 |
| May | 1% | 0% | 1,953 |
| June | 1% | 0% | 1,975 |
| July | 1% | 0% | 2,035 |
| August | 1% | 0% | 1,515 |
| September | 1% | 0% | 1,369 |
| October | 1% | 0% | 1,392 |
| November | 1% | 0% | 1,151 |
| December | 1% | 0% | 1,141 |
Frequently asked
What is the best month to fly from SFO to ORD?
January has the highest on-time rate at 1% for flights from San Francisco to Chicago.
What is the worst month to fly SFO to ORD?
January has the lowest on-time rate at 1%, often due to winter weather.
How often are SFO to ORD flights delayed?
On average, 1% of flights from SFO to ORD arrive on time. That means about 99% experience some form of delay.
Source: Bureau of Transportation Statistics.