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Flight Reliability

DL 2652 · Delta Air Lines

Boston → San Antonio (BOS–SAT)97% of its flights flew this route. The rest (SAT–BOS) are included in these numbers.

79
Usually Fine
WanderNerd Reliability Score
81%
Arrive within 15 minutes
4 min
Average arrival delay
2.2%
Cancelled
11 min early
Median arrival delay

Based on 366 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 85% of the time, against 80% between 3–6 PM.

Sunday scaries are real for this one.

DL 2652 arrived on time 88% of the time on Mondays and just 72% on Sundays. That gap is worth planning around.

Trending in the right direction.

DL 2652 arrived on time 87% of the time over the last three months in the data, compared with 73% in the three months before that.

The breakdown

On-time by weekday
  • Mon88%(49 flights)
  • Tue78%(54 flights)
  • Wed79%(53 flights)
  • Thu83%(48 flights)
  • Fri84%(51 flights)
  • Sat86%(49 flights)
  • Sun72%(53 flights)
On-time by departure window
  • 6–9 AM85%(33 flights)
  • 9 AM–12 PM81%(312 flights)
  • 12–3 PM—(2 flights)
  • 3–6 PM80%(10 flights)
On-time trend by month
77%
May

Jun 76% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%29
July 202590%29
August 202590%30
September 202583%30
October 202577%30
November 202582%27
December 202569%35
January 202680%30
February 202670%27
March 202697%31
April 202686%29
May 202677%30
Departures on time
84%
Diverted
0.3%
Flights flown
357
Months covered
12

Keep nerding

Based on 366 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.