Islip (ISP) to Tampa (TPA): On-Time Performance
Data through May 2026
Delays are only half the story on ISP–TPA: 3.2% of its scheduled flights were outright cancelled, well above the US norm, so a backup plan matters more here than on most routes. When flights do go, 72% land on time, below the national average of 78%. Frontier Airlines has been the safer pick, arriving on time 74% of the time.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 3.2%
- Flights/day
- 1.3
- last 12 months
- Duration
- 3h 3m
- scheduled
- Distance
- 1,034 mi
Best airline from ISP to TPA
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 74% | 22 min | 4.0% | 569 |
| Southwest Airlines | 72% | 19 min | 1.0% | 289 |
| JetBlue Airways | 64% | 16 min | 4.9% | 82 |
Monthly on-time trend
Best time to fly from ISP to TPA
Aim for departures around 9 a.m. (92% on-time); avoid 6 p.m. departures (49%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 20 min |
| Tuesdaybest | 81% | 10 min |
| Wednesday | 69% | 28 min |
| Thursday | 78% | 13 min |
| Friday | 74% | 15 min |
| Saturday | 74% | 16 min |
| Sunday | 66% | 36 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft55%
- Airline operations16%
- National airspace system26%
- Weather2%
Frequently asked questions
- How often are flights from ISP to TPA delayed?
- 28% of ISP–TPA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 21 minutes.
- Which airline is most reliable from ISP to TPA?
- Frontier Airlines has the best on-time record on this route at 74%, based on 569 flights. 3 airlines flew ISP–TPA frequently enough to compare in this period.
- What is the best time of day to fly from ISP to TPA?
- Departures around 9 a.m. have the best record (92% on-time), while departures around 6 p.m. have the worst (49%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ISP to TPA?
- The scheduled ISP–TPA flight time averages 3h 3m over 1,034 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
- How often are ISP to TPA flights cancelled?
- 3.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from ISP to TPA?
- December 2024 was the roughest month in this dataset, with only 50% of arrivals on time. The best was November 2024 at 91%. If your dates are flexible, that 41-point gap is worth planning around.
Explore related pages
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Based on 940 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.