San Juan (SJU) to Hartford (BDL): On-Time Performance
Data through May 2026
The calendar drives reliability on SJU–BDL. June 2025 flights landed on schedule 89% of the time, but June 2024 dropped to 49% — a gap of 40 points. Across the full period the route averages 69% on-time against a national 78%. Morning departures also hold up better than evening ones (79% vs 63%), which matters most in the rough months.
- On-time
- 69%
- arrived <15 min late
- Avg delay
- 23 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 2.6
- last 12 months
- Duration
- 4h 4m
- scheduled
- Distance
- 1,666 mi
Best airline from SJU to BDL
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 70% | 23 min | 1.3% | 1,422 |
| Frontier Airlines | 68% | 23 min | 1.5% | 522 |
Monthly on-time trend
Best time to fly from SJU to BDL
Aim for departures around 2 a.m. (80% on-time); avoid 5 p.m. departures (52%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 25 min |
| Tuesday | 70% | 17 min |
| Wednesdaybest | 76% | 21 min |
| Thursday | 69% | 22 min |
| Friday | 67% | 23 min |
| Saturday | 65% | 28 min |
| Sunday | 69% | 25 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft33%
- Airline operations46%
- National airspace system20%
- Weather1%
Frequently asked questions
- How often are flights from SJU to BDL delayed?
- 31% of SJU–BDL 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 23 minutes.
- Which airline is most reliable from SJU to BDL?
- JetBlue Airways has the best on-time record on this route at 70%, based on 1,422 flights. 2 airlines flew SJU–BDL frequently enough to compare in this period.
- What is the best time of day to fly from SJU to BDL?
- Departures around 2 a.m. have the best record (80% on-time), while departures around 5 p.m. have the worst (52%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SJU to BDL?
- The scheduled SJU–BDL flight time averages 4h 4m over 1,666 miles. Actual arrival times vary — flights on this route land 15+ minutes late 31% of the time.
- How often are SJU to BDL 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 SJU to BDL?
- June 2024 was the roughest month in this dataset, with only 49% of arrivals on time. The best was June 2025 at 89%. If your dates are flexible, that 40-point gap is worth planning around.
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Based on 1,944 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.