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Flight Reliability

DL 565 · Delta Air Lines

Detroit → Seattle (DTW–SEA)

59
A Little Dicey
WanderNerd Reliability Score
62%
Arrive within 15 minutes
22 min
Average arrival delay
1.2%
Cancelled
7 min
Median arrival delay

Based on 335 historical flights. Data through May 2026.

What the data says

Mondays have been rough.

DL 565 arrived on time 79% of the time on Tuesdays and just 49% on Mondays. That gap is worth planning around.

Lagging the DTW–SEA route.

DL 565 arrived on time 62% of the time, versus 74% across the DTW–SEA route.

Well behind the Delta Air Lines network.

DL 565 arrived on time 62% of the time, versus 81% across the Delta Air Lines network.

Slipping a little lately.

DL 565 arrived on time 50% of the time over the last three months in the data, compared with 55% in the three months before that.

The breakdown

On-time by weekday
  • Mon49%(49 flights)
  • Tue79%(48 flights)
  • Wed63%(49 flights)
  • Thu58%(50 flights)
  • Fri61%(49 flights)
  • Sat72%(36 flights)
  • Sun52%(50 flights)
On-time by departure window
  • 6–9 PM61%(329 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
63%
May

Jun 66% → May 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%29
July 202550%30
August 202574%27
September 202575%20
October 202587%30
November 202575%28
December 202539%31
January 202665%31
February 202663%24
March 202624%25
April 202662%26
May 202663%30
Departures on time
63%
Diverted
0%
Flights flown
331
Months covered
12

Same route, other flights

Keep nerding

Based on 335 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.