68% of flights from Islip to Tampa arrived on time over the past 12 months. That is worse than the typical U.S. route. 13% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for ISP → TPA: when a flight was late, it was under 45 minutes late 54% of the time. About 1 in 11 flights landed an hour or more late, and 1 in 72 three hours or more; 3.9% were cancelled outright.
- On time or early68%
- 15–30 min late11%
- 30–60 min late7.4%
- 1–2 hours late6.5%
- 2–3 hours late1.6%
- 3+ hours late1.4%
- Diverted0.0%
- Cancelled3.9%
Share of all 433 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Frontier Airlines | 252 | 71% | 4.0% | −10 min | 10.3% | +83 min | Frontier Airlines |
| Southwest Airlines | 99 | — | — | — | — | — | Southwest Airlines |
| JetBlue | 82 | — | — | — | — | — | JetBlue |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at ISP). Delays build through the day as late planes knock on, so early flights usually do best.
By month
Each calendar month pooled over 2023–2026. Best: October (90%). Worst: December (62%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 77 | — | — |
| Tuesday | 17 | — | — |
| Wednesday | 42 | — | — |
| Thursday | 37 | — | — |
| Friday | 84 | — | — |
| Saturday | 104 | 65% | 2.9% |
| Sunday | 72 | — | — |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 12 · airline 4 · air traffic/airport 1
Month by month
Not enough months with data to draw a trend.
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| F9 3355 | 7:46 p.m. | 187 | 71% | 4.8% | −10 min | Frontier Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Feb 23, 2026 | 3 | 0% | 3 |
| Feb 21, 2026 | 3 | 0% | 0 |
| Dec 27, 2025 | 3 | 0% | 2 |
| Feb 27, 2026 | 3 | 33% | 0 |
| Sep 21, 2025 | 3 | 33% | 1 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Islip or Tampa. EWR → TPA has been 11 points more reliable.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| ISP → TPA (this route) | 433 | 68% | 3.9% |
| EWR → TPA Newark to Tampa | 2,503 | 79% | 2.2% |
| EWR → SRQ Newark to Sarasota Bradenton | 929 | 76% | 2.5% |
| LGA → SRQ LaGuardia to Sarasota Bradenton | 542 | 76% | 5.7% |
| JFK → SRQ New York JFK to Sarasota Bradenton | 534 | 75% | 4.3% |
| JFK → TPA New York JFK to Tampa | 2,310 | 73% | 4.2% |
| LGA → TPA LaGuardia to Tampa | 2,763 | 68% | 3.3% |
Questions
How often are flights from ISP to TPA on time?
68% of 433 scheduled flights from Islip, NY to Tampa, FL arrived within 15 minutes of schedule between September 2025 and August 2026. 3.9% were cancelled.
What month has the most delays from ISP to TPA?
December (62% on time). The best month is October (90%), over 2023–2026.
Related
- TPA → ISP (return)
- Long Island MacArthur (ISP) delays by hour
- Flights into Tampa (TPA)
- Frontier Airlines on-time record
- Southwest Airlines on-time record
- JetBlue on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.