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Flight Reliability

DL 2256 · Delta Air Lines

Seattle → Kansas City (SEA–MCI)

72
Usually Fine
WanderNerd Reliability Score
78%
Arrive within 15 minutes
6 min
Average arrival delay
1.9%
Cancelled
7 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 2256 departing between 6–9 PM arrived on time 84% of the time, versus 77% between 3–6 PM.

Sunday scaries are real for this one.

DL 2256 arrived on time 87% of the time on Mondays. On Sundays: 72%.

A bit behind the Delta Air Lines network.

DL 2256 arrived on time 78% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 2256 arrived on time 88% of the time over the last three months in the data, compared with 78% in the three months before that.

The breakdown

On-time by weekday
  • Mon87%(52 flights)
  • Tue73%(51 flights)
  • Wed82%(50 flights)
  • Thu74%(49 flights)
  • Fri76%(49 flights)
  • Sat80%(51 flights)
  • Sun72%(50 flights)
On-time by departure window
  • 3–6 PM77%(303 flights)
  • 6–9 PM84%(49 flights)
On-time trend by month
80%
May

Jun 79% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%28
July 202570%30
August 202568%31
September 202563%30
October 202573%30
November 202583%29
December 202573%30
January 202683%29
February 202678%27
March 202693%29
April 202690%29
May 202680%30
Departures on time
78%
Diverted
1.4%
Flights flown
352
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.