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Flight Reliability

DL 5740 · Delta Air Lines

Philadelphia → Boston (PHL–BOS)

94
Nerd Approved
WanderNerd Reliability Score
93%
Arrive within 15 minutes
10 min early
Average arrival delay
1.9%
Cancelled
14 min early
Median arrival delay

Based on 359 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 5740 arrived on time 96% of the time on Thursdays. On Sundays: 88%.

Well ahead of the PHL–BOS route.

DL 5740 arrived on time 93% of the time, versus 75% across the PHL–BOS route.

Better than the Delta Air Lines network average.

DL 5740 arrived on time 93% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 5740 arrived on time 97% of the time over the last three months in the data, compared with 83% in the three months before that.

The breakdown

On-time by weekday
  • Mon96%(49 flights)
  • Tue90%(49 flights)
  • Wed92%(51 flights)
  • Thu96%(51 flights)
  • Fri94%(51 flights)
  • Sat96%(50 flights)
  • Sun88%(51 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM93%(350 flights)
  • 9 AM–12 PM—(1 flights)
On-time trend by month
100%
May

Jun 93% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%28
July 2025100%26
August 202594%31
September 2025100%30
October 202597%31
November 202597%30
December 202577%30
January 202676%29
February 202696%26
March 202693%30
April 202697%30
May 2026100%31
Departures on time
95%
Diverted
0%
Flights flown
352
Months covered
12

Same route, other flights

Keep nerding

Based on 359 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.