Best Time to Fly DCA to SJU: On-Time Stats by Hour & Airline
Ronald Reagan Washington National → Luis Munoz Marin International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.4% of Washington (DCA) to San Juan (SJU) flights arrived on time (364 scheduled flights). That is 4.3 points below the national average of 77.6%.
JetBlue was the only reporting airline with regular flights on this route.
Over 24 months, Monday was the most reliable day (81% on time) and June the worst month (69%).
The cancellation rate was 1.6% (US average 1.8%).
DCA to SJU on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue | 73.4% | 74 min | 1.6% | 364 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DCA to SJU
On-time arrival % by scheduled departure hour (local time), 729 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 77.0% | 1.6% | 729 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DCA to SJU
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 69.5% | -9.1 pts | 1.6% | 123 |
| All other days | 78.6% | — | 1.6% | 562 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).