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Flight Reliability

DL 4075 · Delta Air Lines

Sacramento → Seattle (SMF–SEA)100% of its flights flew this route. The rest (DTW–ALB) are included in these numbers.

100
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
12 min early
Average arrival delay
0%
Cancelled
16 min early
Median arrival delay

Based on 350 historical flights. Data through May 2026.

What the data says

Skip Tuesday if you can.

DL 4075 arrived on time 96% of the time on Wednesdays. On Tuesdays: 84%.

Better than the SMF–SEA route average.

DL 4075 arrived on time 92% of the time, versus 83% across the SMF–SEA route.

Better than the Delta Air Lines network average.

DL 4075 arrived on time 92% of the time, versus 81% across the Delta Air Lines network.

It basically never cancels.

Out of 350 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon94%(50 flights)
  • Tue84%(50 flights)
  • Wed96%(50 flights)
  • Thu94%(50 flights)
  • Fri96%(50 flights)
  • Sat92%(49 flights)
  • Sun90%(51 flights)
On-time by departure window
  • 6–9 AM92%(349 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
90%
May

Jun 100% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%30
July 2025100%31
August 202590%31
September 202587%30
October 2025100%31
November 202593%30
December 202590%19
January 202675%28
February 202693%28
March 202690%31
April 202697%30
May 202690%31
Departures on time
96%
Diverted
0%
Flights flown
350
Months covered
12

Same route, other flights

Keep nerding

Based on 350 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.