Best Time to Fly BOS to SJU
Boston to San Juan — month-by-month delay data from the Bureau of Transportation Statistics.
Best month
January
1% on time
Worst month
January
1% on time
BOS → SJU on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
Monthly breakdown
| Month | On-time | Cancel rate | Flights |
|---|---|---|---|
| January | 1% | 0% | 635 |
| February | 1% | 0% | 664 |
| March | 1% | 0% | 742 |
| April | 1% | 0% | 732 |
| May | 1% | 0% | 612 |
| June | 1% | 0% | 660 |
| July | 1% | 0% | 707 |
| August | 1% | 0% | 580 |
| September | 1% | 0% | 318 |
| October | 1% | 0% | 355 |
| November | 1% | 0% | 417 |
| December | 1% | 0% | 510 |
Frequently asked
What is the best month to fly from BOS to SJU?
January has the highest on-time rate at 1% for flights from Boston to San Juan.
What is the worst month to fly BOS to SJU?
January has the lowest on-time rate at 1%, often due to winter weather.
How often are BOS to SJU flights delayed?
On average, 1% of flights from BOS to SJU arrive on time. That means about 99% experience some form of delay.
Source: Bureau of Transportation Statistics.