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Flight Reliability

DL 5600 · Delta Air Lines

Washington → Boston (DCA–BOS)83% of its flights flew this route. The rest (BNA–DCA, MCO–MCI) are included in these numbers.

51
A Little Dicey
WanderNerd Reliability Score
64%
Arrive within 15 minutes
18 min
Average arrival delay
3.9%
Cancelled
3 min early
Median arrival delay

Based on 284 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

DL 5600 departing between 9 AM–12 PM arrived on time 84% of the time, versus 60% between 12–3 PM.

Tuesdays have been rough.

DL 5600 arrived on time 87% of the time on Saturdays and just 56% on Tuesdays. That gap is worth planning around.

Lagging the DCA–BOS route.

DL 5600 arrived on time 64% of the time, versus 71% across the DCA–BOS route.

Well behind the Delta Air Lines network.

DL 5600 arrived on time 64% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon63%(38 flights)
  • Tue56%(41 flights)
  • Wed58%(40 flights)
  • Thu59%(34 flights)
  • Fri60%(40 flights)
  • Sat87%(37 flights)
  • Sun69%(42 flights)
On-time by departure window
  • 9 AM–12 PM84%(32 flights)
  • 12–3 PM60%(173 flights)
  • 3–6 PM67%(67 flights)
On-time trend by month
82%
May

Jun 64% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%28
July 202557%30
August 202587%30
September 202530%27
October 202539%26
November 202583%23
December 202568%19
March 202667%24
April 202663%30
May 202682%27
Departures on time
72%
Diverted
0.4%
Flights flown
272
Months covered
12

Same route, other flights

Keep nerding

Based on 284 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.