Carrier route record

F9TPA→SJU

Frontier Airlines · Tampa to San Juan

Flights: 360
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 TPA to SJU sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 360 flights. The strongest carrier on the route with a full sample, JetBlue Airways, flew 680 at 76.0% on time.

The national on-time rate over the same period is 77.3%, so Frontier on TPA to SJU runs 4 points behind the country as a whole. Across a thousand flights that is about 40 extra late arrivals.

On time

73.3%

Arrivals under 15 minutes late, of 352 completed flights

Avg delay

109 min

Across delayed arrivals only, not all flights

Cancelled

2.22%

National rate is 1.89%

Whole route

72.7%

Every carrier on TPA to SJU, 1,561 flights

These figures cover 360 flights between September 2025 and August 2026. Beyond the headline rate, 14.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Carrier by carrier

Frontier against every carrier on TPA to SJU

Frontier flew 360 of the 1,561 flights on TPA to SJU, about 23% of it. Its 73.3% on time is about level with the route as a whole at 72.7%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from Spirit at 81.8% to Southwest at 66.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. JetBlue Airways arrives on time 76.0% of the time; Southwest Airlines manages 66.5%. Sample sizes sit next to every figure, because a two-point gap across 470 flights means less than a ten-point one.

On-time performance by carrier on TPA to SJU
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	51	81.8%	34 min	13.73%	B−
JetBlue Airways	680	76.0%	81 min	1.62%	B
Frontier Airlines (this page)thin sample	360	73.3%	109 min	2.22%	C
Southwest Airlines	470	66.5%	52 min	0.43%	C+

JetBlue leads Southwest by 10 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

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 16 points, against 10 points between the best and worst carrier.

5am–8am30 flights—
8am–11am64 flights82.8%
11am–2pm48 flights75.0%
2pm–5pm14 flights—
5pm–8pm21 flights—
8pm–5am183 flights66.9%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 82.8% of the time, against 66.9% for the overnight window. That is 16 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 183 flights scheduled in it.

Across the year

Frontier on TPA to SJU through the year

Jul–Sep 202521 flights—
Oct–Dec 202597 flights71.6%
Jan–Mar 202682 flights81.0%
Apr–Jun 202698 flights72.4%
Jul–Sep 202662 flights62.7%

Scale runs 55% 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 73.3% on time across 360 flights.

Frontier on TPA to SJU did not run the same all year. Its best quarter was Jan–Mar 2026 at 81.0% on time and its weakest Jul–Sep 2026 at 62.7%, a swing of 18 points on roughly 90 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Friday is the strongest day at 77.8% on time and Monday the weakest at 68.9%, a spread of 9 points.

Arrival by arrival

How late Frontier on TPA to SJU runs when it is late

When Frontier on TPA to SJU is late it tends to be very late: 51 of its 94 late arrivals were an hour or more behind, and 22 were two hours or more.

15+ min early68 flights19.3%
Within 15 min190 flights54.0%
15–29 min late18 flights5.1%
30–59 min late25 flights7.1%
1–2 hours late29 flights8.2%
2+ hours late22 flights6.3%

Scale runs 0% to 100%.

Share of 352 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 98 departures that left 15 minutes late or more, only 11 made it up before arrival. Only 7 left on time and still arrived late.

The worst days

Worst days for Frontier on TPA to SJU

The latest arrival of the period was on 1 May 2026, 18 hours 32 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of Frontier on TPA to SJU in the period
Date	Arrived late by	Largest filed cause
1 May 2026	18 hours 32 minutes	Carrier
15 February 2026	13 hours 45 minutes	Carrier
1 December 2025	10 hours 41 minutes	Late-arriving aircraft
11 March 2026	8 hours 16 minutes	Late-arriving aircraft
22 February 2026	7 hours 24 minutes	Late-arriving aircraft

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 63% of the 10,000 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
63%
Carrier
33%
National Airspace System
4%

63% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 10,000 reported delay minutes here, that single category outweighs weather by 63 to one. The split is drawn from 10,266 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 82.8% on time here.

Cancellations sit at 2.22% against a national 1.89%, which is ordinary. Diversions add another 0.00%.

Connections and stage length

What a delay here costs

14.5% 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 76.8% on time across 363 flights, 4 points above 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. 360 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 TPA to SJU

Put together: treat all of this as provisional. 360 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 73.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 352 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures