Washington (DCA) to San Juan (SJU): On-Time Performance
Data through May 2026
The calendar drives reliability on DCA–SJU. May 2025 flights landed on schedule 97% of the time, but July 2024 dropped to 61% — a gap of 36 points. Across the full period the route averages 77% on-time against a national 78%.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 1.0
- last 12 months
- Duration
- 3h 49m
- scheduled
- Distance
- 1,554 mi
Monthly on-time trend
Best time to fly from DCA to SJU
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 16 min |
| Tuesdaybest | 84% | 21 min |
| Wednesday | 80% | 22 min |
| Thursday | 69% | 16 min |
| Friday | 73% | 18 min |
| Saturday | 79% | 15 min |
| Sunday | 76% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft14%
- Airline operations38%
- National airspace system38%
- Weather10%
Frequently asked questions
- How often are flights from DCA to SJU delayed?
- 23% of DCA–SJU flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 18 minutes.
- How long is the flight from DCA to SJU?
- The scheduled DCA–SJU flight time averages 3h 49m over 1,554 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are DCA to SJU flights cancelled?
- 1.4% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from DCA to SJU?
- July 2024 was the roughest month in this dataset, with only 61% of arrivals on time. The best was May 2025 at 97%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 730 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.