Carrier route record
NKDFW→SJU
Spirit Airlines · Dallas-Fort Worth to San Juan
- Flights
- 184
- Period
- September 2025 to August 2026
- Share of route
- 19%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Spirit Airlines.
Spirit on DFW to SJU lands a B−, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 184 flights, with a median arrival 3 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Spirit on DFW to SJU from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.9%
Arrivals under 15 minutes late, of 173 completed flights
Avg delay
112 min
Across delayed arrivals only, not all flights
Cancelled
5.98%
National rate is 1.89%
Whole route
70.1%
Every carrier on DFW to SJU, 971 flights
These figures cover 184 flights between September 2025 and August 2026. Beyond the headline rate, 12.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Spirit against every carrier on DFW to SJU
Spirit flew 184 of the 971 flights on DFW to SJU, about 19% of it. Its 76.9% on time is 7 points better than the route as a whole, which runs 70.1%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Spirit at 76.9% to Frontier at 61.8%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlines (this page)thin sample | 184 | 76.9% | 112 min | 5.98% | B− |
| American Airlines | 703 | 69.4% | 61 min | 1.42% | C |
| Frontier Airlinesthin sample | 84 | 61.8% | 56 min | 9.52% | D− |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Spirit runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 34 points, against half a point between the best and worst carrier.
- 5am–8am91 flights80.5%
- 8am–11am36 flights91.7%
- 11am–2pm5 flights—
- 2pm–5pm5 flights—
- 5pm–8pm47 flights57.8%
- 8pm–5am—
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 57.8% on time, against 91.7% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 91 flights scheduled in it.
Across the year
Spirit on DFW to SJU through the year
- Jul–Sep 202517 flights—
- Oct–Dec 202564 flights70.3%
- Jan–Mar 202683 flights77.8%
- Apr–Jun 202620 flights—
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 76.9% on time across 184 flights.
Split by quarter, Spirit on DFW to SJU logged 17 flights in Jul–Sep 2025, 64 flights in Oct–Dec 2025, 83 flights in Jan–Mar 2026 and 20 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 76.9% annual figure is the one to use.
Across the week, Thursday is the strongest day at 84.8% on time and Friday the weakest at 74.2%, a spread of 11 points.
Arrival by arrival
How late Spirit on DFW to SJU runs when it is late
When Spirit on DFW to SJU is late it tends to be very late: 21 of its 40 late arrivals were an hour or more behind, and 12 were two hours or more.
- 15+ min early33 flights19.1%
- Within 15 min100 flights57.8%
- 15–29 min late12 flights6.9%
- 30–59 min late7 flights4.0%
- 1–2 hours late9 flights5.2%
- 2+ hours late12 flights6.9%
Scale runs 0% to 100%.
Share of 173 completed flights by arrival against schedule.
5 of 40 late departures made up the time and arrived on time, 13% of them. 5 flights left on time and still arrived late.
The worst days
Worst days for Spirit on DFW to SJU
The latest arrival of the period was on 14 March 2026, 11 hours 6 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 March 2026 | 11 hours 6 minutes | Late-arriving aircraft |
| 15 March 2026 | 8 hours 42 minutes | Carrier |
| 22 September 2025 | 4 hours 42 minutes | Carrier |
| 5 February 2026 | 4 hours 7 minutes | Carrier |
| 29 December 2025 | 3 hours 35 minutes | Late-arriving aircraft |
Delay causes
Why Spirit runs late on this route
Carrier accounts for 50% of the 4,463 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 33%Late-arriving aircraft
- 17%National Airspace System
The largest share of delay minutes, 50%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,235 of the 4,463 delay minutes reported here. The split is drawn from 4,463 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.7% on time here.
Cancellations run at 5.98%, against 1.89% nationally. That is roughly one flight in fifteen cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
12.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 2,165 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 75.1% on time across 187 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 184 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Spirit on DFW to SJU
Put together: the delay figures matter less here than the 5.98% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 173 completed flights over 12 months sit behind that.
Related
Where to go next
- DFW to SJU, every carrier
- Spirit on SJU to DFW, the return leg
- American Airlines on DFW to SJU69.4%
- Spirit Airlines network-wide record
- Dallas/Fort Worth International (DFW) delay statistics
- Luis Munoz Marin International (SJU) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.