Carrier route record
F9SJU→TPA
Frontier Airlines · San Juan to Tampa
- Flights
- 363
- Period
- September 2025 to August 2026
- Share of route
- 23%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on SJU to TPA lands a B, level with the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 363 flights. The strongest carrier on the route with a full sample, Southwest Airlines, flew 469 at 79.6% on time.
The US average over the same twelve months is 77.3%, so there is little to separate Frontier on SJU to TPA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.8%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
2.48%
National rate is 1.89%
Whole route
77.2%
Every carrier on SJU to TPA, 1,562 flights
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 9.1% 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
Frontier against every carrier on SJU to TPA
Frontier flew 363 of the 1,562 flights on SJU to TPA, about 23% of it. Its 76.8% on time is about level with the route as a whole at 77.2%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from Southwest at 79.6% to Spirit at 55.8%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 3 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 469 | 79.6% | 59 min | 0.85% | B+ |
| JetBlue Airways | 680 | 77.1% | 72 min | 1.47% | B |
| Frontier Airlines (this page)thin sample | 363 | 76.8% | 87 min | 2.48% | B |
| Spirit Airlinesthin sample | 50 | 55.8% | 51 min | 14.00% | D− |
No carrier stands out. Southwest tops the table at 79.6%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.
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 Frontier runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 22 points, against 3 points between the best and worst carrier.
- 5am–8am53 flights84.9%
- 8am–11am48 flights93.3%
- 11am–2pm20 flights—
- 2pm–5pm91 flights71.1%
- 5pm–8pm135 flights72.3%
- 8pm–5am16 flights—
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 93.3% of the time, against 71.1% for the afternoon window. That is 22 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 135 flights scheduled in it.
Across the year
Frontier on SJU to TPA through the year
Delays peak in April, when the on-time rate falls to 64.7%. January is the strongest month at 88.2%. Moving a flexible trip across that boundary buys 24 points. December was the busiest month here, with 44 flights.
Across the week, Friday is the strongest day at 81.2% on time and Tuesday the weakest at 65.7%, a spread of 16 points.
Arrival by arrival
How late Frontier on SJU to TPA runs when it is late
Frontier on SJU to TPA often beats the schedule: 133 of 353 completed flights, 38%, arrived 15 minutes or more early. The 82 late arrivals split 20 under half an hour, 30 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early133 flights37.7%
- Within 15 min138 flights39.1%
- 15–29 min late20 flights5.7%
- 30–59 min late30 flights8.5%
- 1–2 hours late21 flights5.9%
- 2+ hours late11 flights3.1%
Scale runs 0% to 100%.
Share of 353 completed flights by arrival against schedule.
16 of 88 late departures made up the time and arrived on time, 18% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for Frontier on SJU to TPA
The latest arrival of the period was on 24 November 2025, 19 hours 26 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 November 2025 | 19 hours 26 minutes | Late-arriving aircraft |
| 26 February 2026 | 7 hours 52 minutes | Late-arriving aircraft |
| 22 February 2026 | 7 hours 4 minutes | Late-arriving aircraft |
| 20 April 2026 | 4 hours 42 minutes | Late-arriving aircraft |
| 12 July 2026 | 3 hours 57 minutes | Carrier |
Delay causes
Why Frontier runs late on this route
Late-arriving aircraft accounts for 73% of the 7,139 delay minutes carriers reported here, and the remaining four split what is left.
- 73%Late-arriving aircraft
- 23%Carrier
- 4%National Airspace System
73% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,139 reported delay minutes here, that single category outweighs weather by 73 to one. The split is drawn from 7,139 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 93.3% on time here.
Cancellations sit at 2.48% against a national 1.89%, which is ordinary. Diversions add another 0.28%.
Connections and stage length
What a delay here costs
9.1% 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.
The 1,237 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 73.3% on time across 360 flights, 4 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
One caution: this is a thin sample. 363 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 Frontier on SJU to TPA
Put together: treat all of this as provisional. 363 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 76.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 353 completed flights over 12 months sit behind that.
Related
Where to go next
- SJU to TPA, every carrier
- Frontier on TPA to SJU, the return leg
- Southwest Airlines on SJU to TPA79.6%
- JetBlue Airways on SJU to TPA77.1%
- Frontier Airlines network-wide record
- Luis Munoz Marin International (SJU) delay statistics
- Tampa International (TPA) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
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.