Best Time to Fly STL to SFO
St. Louis to San Francisco — month-by-month delay data from the Bureau of Transportation Statistics.
Best month
January
1% on time
Worst month
June
0% on time
STL → SFO on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
Monthly breakdown
| Month | On-time | Cancel rate | Flights |
|---|---|---|---|
| January | 1% | 0% | 128 |
| February | 1% | 0% | 113 |
| March | 1% | 0% | 147 |
| April | 1% | 0% | 167 |
| May | 1% | 0% | 184 |
| June | 0% | 0% | 172 |
| July | 0% | 0% | 176 |
| August | 1% | 0% | 116 |
| September | 1% | 0% | 140 |
| October | 1% | 0% | 141 |
| November | 1% | 0% | 134 |
| December | 1% | 0% | 124 |
Frequently asked
What is the best month to fly from STL to SFO?
January has the highest on-time rate at 1% for flights from St. Louis to San Francisco.
What is the worst month to fly STL to SFO?
June has the lowest on-time rate at 0%, often due to summer thunderstorms.
How often are STL to SFO flights delayed?
On average, 1% of flights from STL to SFO arrive on time. That means about 99% experience some form of delay.
Source: Bureau of Transportation Statistics.