Best Time to Fly DFW to SJU: On-Time Stats by Hour & Airline
Dallas/Fort Worth International → Luis Munoz Marin International
Data through July 2026 · Last updated October 18, 2026
984 flights were scheduled from Dallas/Fort Worth (DFW) to San Juan (SJU) in the last 12 months, and 69.0% of those that flew arrived on time, 8.7 points below the US average of 77.6%.
Spirit Airlines was the most punctual of the 3 airlines on the route at 75.7%, while Frontier Airlines trailed at 56.7%.
October has been the best month (93% on time) and Tuesday the weakest day of the week (66%).
3.0% of flights were cancelled, versus 1.8% nationally.
DFW 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 |
|---|---|---|---|---|
| Spirit Airlines | 75.7% | 109 min | 5.2% | 213 |
| American Airlines | 68.1% | 64 min | 1.6% | 704 |
| Frontier Airlines | 56.7% | 54 min | 10.4% | 67 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DFW to SJU
On-time arrival % by scheduled departure hour (local time), 1,971 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 77.4% | 4.1% | 97 |
| 6am–7am | 83.7% | 4.8% | 103 |
| 7am–8am | 74.6% | 0.0% | 63 |
| 8am–9am | 80.2% | 1.1% | 607 |
| 9am–10am | Limited data | 2 | |
| 10am–11am | 79.2% | 0.0% | 72 |
| 11am–12pm | 79.2% | 0.0% | 54 |
| 12pm–1pm | Limited data | 1 | |
| 1pm–2pm | Limited data | 29 | |
| 2pm–3pm | Limited data | 28 | |
| 3pm–4pm | 61.1% | 2.7% | 74 |
| 4pm–5pm | 63.5% | 1.2% | 86 |
| 5pm–6pm | 53.3% | 1.2% | 245 |
| 6pm–7pm | 53.9% | 0.0% | 39 |
| 10pm–11pm | 65.7% | 0.6% | 180 |
| 11pm–12am | 60.6% | 2.4% | 291 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DFW 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) | 84.2% | +10.1 pts | 0.0% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 66.0% | -8.1 pts | 4.7% | 149 |
| Summer peak (Jun 15 - Aug 15) | 54.4% | -19.7 pts | 1.1% | 359 |
| All other days | 74.1% | — | 1.3% | 1,425 |
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).