BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
TPAISP

Tampa, FL (TPA) to Islip, NY (ISP) flight delay odds

Historically, 71.3% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 457 flights.

HISTORICAL ROUTE SIGNALVariable
71.3%arrived on time
17.9%30+ min late
2.6%cancelled
457scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.6%all scheduled flights
120+ minutes late3.7%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+10.6 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning6185.2%4.9%4.9%
Late morning14364.3%21.0%3.5%
Afternoon19673.0%17.3%1.0%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday7668.4%14.5%7.9%
Wednesday4283.3%9.5%0.0%
Thursday4780.9%14.9%0.0%
Friday8375.9%18.1%1.2%
Saturday10869.4%23.1%0.0%
Sunday7958.2%20.3%5.1%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
Frontier Airlines27774.7%17.3%2.9%
Southwest Airlines9965.7%17.2%2.0%
JetBlue Airways8166.7%21.0%2.5%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 20253959.0%30.8%0.0%
August 20254273.8%16.7%0.0%
September 20253686.1%8.3%2.8%
October 20253076.7%10.0%6.7%
November 20253174.2%16.1%0.0%
December 20254969.4%18.4%4.1%
January 20264178.0%9.8%4.9%
February 20265058.0%26.0%6.0%
March 20264360.5%25.6%2.3%
April 20265174.5%17.6%2.0%
May 20262090.0%10.0%0.0%
June 20262572.0%16.0%0.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline31.3%
Late aircraft50.6%
National airspace15.4%
Weather2.6%
Security0.1%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.