Dallas/Fort Worth (DFW) to San Juan (SJU): On-Time Performance
Data through July 2026
When you fly DFW to SJU matters as much as anything else about the booking: the route swung from 96% on-time in October 2024 to just 48% in June 2026. 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 58%), which matters most in the rough months.
- On-time
- 69%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 2.7
- last 12 months
- Duration
- 4h 40m
- scheduled
- Distance
- 2,165 mi
Best airline from DFW to SJU
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 73% | 22 min | 2.0% | 608 |
| American Airlines | 68% | 21 min | 0.9% | 1,354 |
| Frontier Airlines | 54% | 25 min | 5.3% | 131 |
Monthly on-time trend
Best time to fly from DFW to SJU
Aim for departures around 6 a.m. (84% on-time); avoid 6 p.m. departures (49%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 66% | 24 min |
| Tuesday | 64% | 26 min |
| Wednesday | 71% | 15 min |
| Thursdaybest | 76% | 14 min |
| Friday | 69% | 23 min |
| Saturday | 68% | 22 min |
| Sunday | 68% | 26 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations38%
- National airspace system21%
- Weather5%
Frequently asked questions
- How often are flights from DFW to SJU delayed?
- 31% of DFW–SJU flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 21 minutes.
- Which airline is most reliable from DFW to SJU?
- Spirit Airlines has the best on-time record on this route at 73%, based on 608 flights. 3 airlines flew DFW–SJU frequently enough to compare in this period.
- What is the best time of day to fly from DFW to SJU?
- Departures around 6 a.m. have the best record (84% on-time), while departures around 6 p.m. have the worst (49%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DFW to SJU?
- The scheduled DFW–SJU flight time averages 4h 40m over 2,165 miles. Actual arrival times vary — flights on this route land 15+ minutes late 31% of the time.
- How often are DFW to SJU flights cancelled?
- 1.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from DFW to SJU?
- June 2026 was the roughest month in this dataset, with only 48% of arrivals on time. The best was October 2024 at 96%. If your dates are flexible, that 47-point gap is worth planning around.
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Based on 2,093 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.