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Flight Reliability

DL 804 · Delta Air Lines

Dallas–Fort Worth → Seattle (DFW–SEA)

82
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
0 min
Average arrival delay
2.5%
Cancelled
8 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Wednesday if you can.

DL 804 arrived on time 92% of the time on Sundays. On Wednesdays: 78%.

Well ahead of the DFW–SEA route.

DL 804 arrived on time 86% of the time, versus 70% across the DFW–SEA route.

A bit ahead of the Delta Air Lines network.

DL 804 arrived on time 86% of the time, versus 81% across the Delta Air Lines network.

Slipping a little lately.

DL 804 arrived on time 81% of the time over the last three months in the data, compared with 84% in the three months before that.

The breakdown

On-time by weekday
  • Mon90%(49 flights)
  • Tue88%(51 flights)
  • Wed78%(51 flights)
  • Thu86%(51 flights)
  • Fri85%(52 flights)
  • Sat84%(50 flights)
  • Sun92%(50 flights)
On-time trend by month
90%
May

Jun 93% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202597%31
August 202590%30
September 202583%29
October 202583%30
November 202590%30
December 202583%30
January 202681%26
February 202689%28
March 202679%29
April 202673%30
May 202690%31
Departures on time
92%
Diverted
0.5%
Flights flown
354
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.