Carrier route record
B6TPA→SJU
JetBlue Airways · Tampa to San Juan
- Flights
- 614
- Period
- July 2025 to June 2026
- Share of route
- 42%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on TPA to SJU lands a B+, about a point better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 614 flights, with a median arrival 2 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate JetBlue on TPA 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
78.9%
Arrivals under 15 minutes late, of 608 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
0.81%
National rate is 1.81%
Whole route
73.8%
Every carrier on TPA to SJU, 1,478 flights
These figures cover 614 flights between July 2025 and June 2026. Beyond the headline rate, 8.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
JetBlue against every carrier on TPA to SJU
JetBlue flew 614 of the 1,478 flights on TPA to SJU, about 42% of it. Its 78.9% on time is 5 points better than the route as a whole, which runs 73.8%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Spirit at 81.8% to Southwest at 66.7%. Two 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 Airlinesthin sample | 51 | 81.8% | 34 min | 13.73% | B− |
| JetBlue Airways (this page) | 614 | 78.9% | 72 min | 0.81% | B+ |
| Frontier Airlinesthin sample | 342 | 73.4% | 112 min | 2.34% | C |
| Southwest Airlines | 471 | 66.7% | 50 min | 0.42% | C+ |
Flight by flight
JetBlue flight numbers on TPA to SJU
Departure window
When JetBlue runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 28 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am191 flights93.1%
- 8am–11am30 flights80.0%
- 11am–2pm61 flights78.7%
- 2pm–5pm52 flights84.6%
- 5pm–8pm156 flights71.0%
- 8pm–5am124 flights64.8%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 64.8% on time, against 93.1% for the 5am–8am 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 191 flights scheduled in it.
Across the year
JetBlue on TPA to SJU through the year
Delays peak in October, when the on-time rate falls to 62.9%. February is the strongest month at 91.4%. Moving a flexible trip across that boundary buys 29 points. June was the busiest month here, with 80 flights.
Across the week, Friday is the strongest day at 84.3% on time and Saturday the weakest at 72.4%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why JetBlue runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 9,151 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 53%Late-arriving aircraft
- 39%Carrier
- 7%National Airspace System
- 2%Extreme weather
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 9,151 reported delay minutes here, that single category outweighs weather by 26 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 9,151 reported delay minutes.
The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,561 of the 9,151 delay minutes reported here.
Cancellations are rare at 0.81%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
8.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 75.9% on time across 614 flights, 3 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 3 points of difference.
One caution: this is a thin sample. 614 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 JetBlue on TPA to SJU
Put together: treat all of this as provisional. 614 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 78.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 608 completed flights over 12 months sit behind that.
Related
Where to go next
- TPA to SJU, every carrier
- JetBlue on SJU to TPA, the return leg
- Frontier Airlines on TPA to SJU73.4%
- Southwest Airlines on TPA to SJU66.7%
- JetBlue Airways network-wide record
- Tampa International (TPA) delay statistics
- Luis Munoz Marin International (SJU) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.