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Flight Reliability

DL 1636 · Delta Air Lines

New York → Tampa (JFK–TPA)

69
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
11 min
Average arrival delay
3.0%
Cancelled
13 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 1636 arrived on time 83% of the time on Wednesdays and just 59% on Sundays. That gap is worth planning around.

A bit behind the JFK–TPA route.

DL 1636 arrived on time 74% of the time, versus 77% across the JFK–TPA route.

Lagging the Delta Air Lines network.

DL 1636 arrived on time 74% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 1636 was cancelled 3.0% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon74%(50 flights)
  • Tue80%(51 flights)
  • Wed83%(52 flights)
  • Thu65%(51 flights)
  • Fri78%(49 flights)
  • Sat78%(51 flights)
  • Sun59%(49 flights)
On-time by departure window
  • 3–6 PM—(3 flights)
  • 6–9 PM74%(350 flights)
On-time trend by month
81%
May

Jun 54% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%28
July 202555%29
August 202584%31
September 202577%30
October 202574%31
November 202562%29
December 202576%29
January 202676%29
February 202677%26
March 202680%30
April 202690%30
May 202681%31
Departures on time
74%
Diverted
0%
Flights flown
353
Months covered
12

Same route, other flights

Keep nerding

Based on 364 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.