Carrier route record
B6SJU→PHL
JetBlue Airways · San Juan to Philadelphia
- Flights
- 159
- Period
- September 2025 to August 2026
- Share of route
- 8%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with JetBlue Airways.
JetBlue on SJU to PHL earns an A−. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 159 flights. The strongest carrier on the route with a full sample, American Airlines, flew 763 at 80.3% on time.
Set against the rest of the country, JetBlue's SJU to PHL record is 13 points better than the US average of 77.3%. That gap is worth roughly 134 fewer late arrivals for every thousand flights.
Key figures
On time
90.7%
Arrivals under 15 minutes late, of 150 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
4.40%
National rate is 1.89%
Whole route
71.9%
Every carrier on SJU to PHL, 1,992 flights
These figures cover 159 flights between September 2025 and August 2026. The median arrival is 17 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
JetBlue against every carrier on SJU to PHL
JetBlue flew 159 of the 1,992 flights on SJU to PHL, about 8% of it. Its 90.7% on time is 19 points better than the route as a whole, which runs 71.9%. Ranked by on-time rate it is first of four carriers on the route, where the range runs from JetBlue at 90.7% to Spirit at 60.9%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. American Airlines arrives on time 80.3% of the time; Frontier Airlines manages 63.3%. Sample sizes sit next to every figure, because a two-point gap across 916 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| JetBlue Airways (this page)thin sample | 159 | 90.7% | 65 min | 4.40% | A− |
| American Airlines | 763 | 80.3% | 100 min | 2.62% | B |
| Frontier Airlines | 916 | 63.3% | 81 min | 3.17% | D− |
| Spirit Airlinesthin sample | 154 | 60.9% | 71 min | 10.39% | D− |
Frontier Airlines cancels 3.2% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after 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 JetBlue runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 159 flights.
There are not enough flights in each departure window to split JetBlue's SJU to PHL record by time of day without the percentages moving on noise. The headline rate of 90.7% is the reliable figure here.
Across the year
JetBlue on SJU to PHL through the year
- Jan–Mar 20266 flights—
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202662 flights81.8%
Scale runs 75% to 100%. 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 90.7% on time across 159 flights.
Split by quarter, JetBlue on SJU to PHL logged 6 flights in Jan–Mar 2026, 91 flights in Apr–Jun 2026 and 62 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 90.7% annual figure is the one to use.
Arrival by arrival
How late JetBlue on SJU to PHL runs when it is late
JetBlue on SJU to PHL often beats the schedule: 78 of 150 completed flights, 52%, arrived 15 minutes or more early. Most of the lateness is short. 8 of the 14 late arrivals were under half an hour behind, and 3 reached an hour or more.
- 15+ min early78 flights52.0%
- Within 15 min58 flights38.7%
- 15–29 min late8 flights5.3%
- 30–59 min late3 flights2.0%
- 1–2 hours late2 flights1.3%
- 2+ hours late1 flights0.7%
Scale runs 0% to 100%.
Share of 150 completed flights by arrival against schedule.
Only 12 of 150 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for JetBlue on SJU to PHL
The latest arrival of the period was on 21 July 2026, 6 hours 29 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 July 2026 | 6 hours 29 minutes | Carrier |
| 13 August 2026 | 1 hour 57 minutes | Carrier |
| 30 July 2026 | 1 hour 43 minutes | Carrier |
| 8 July 2026 | 59 minutes | Carrier |
| 14 August 2026 | 50 minutes | Carrier |
Delay causes
Why JetBlue runs late on this route
Carrier accounts for 86% of the 904 delay minutes carriers reported here, and the remaining four split what is left.
- 86%Carrier
- 14%National Airspace System
The largest share of delay minutes, 86%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 778 of the 904 delay minutes reported here. The split is drawn from 904 reported delay minutes.
Cancellations run at 4.40%, against 1.89% nationally. That is roughly one flight in 25 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
Badly late arrivals are rare here: only 2.0% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 1,576 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 is a different operation and performs like one: it runs 70.2% on time across 159 flights, 21 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 21 points of difference.
One caution: this is a thin sample. 159 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 SJU to PHL
Put together: the delay figures matter less here than the 4.40% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 150 completed flights over 12 months sit behind that.
Related
Where to go next
- SJU to PHL, every carrier
- JetBlue on PHL to SJU, the return leg
- American Airlines on SJU to PHL80.3%
- Frontier Airlines on SJU to PHL63.3%
- Spirit Airlines on SJU to PHL60.9%
- JetBlue Airways network-wide record
- Luis Munoz Marin International (SJU) delay statistics
- Philadelphia International (PHL) delay statistics
- The US routes with the most cancellations
- Same route, different airline: where the carrier you pick matters most
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.