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Flight Reliability

DL 877 · Delta Air Lines

Minneapolis → Seattle (MSP–SEA)

80
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
7 min
Average arrival delay
0.8%
Cancelled
3 min early
Median arrival delay

Based on 363 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

DL 877 departing between 12–3 PM arrived on time 81% of the time, versus 70% between 3–6 PM.

Sunday scaries are real for this one.

DL 877 arrived on time 84% of the time on Tuesdays. On Sundays: 71%.

A bit behind the MSP–SEA route.

DL 877 arrived on time 78% of the time, versus 82% across the MSP–SEA route.

A bit behind the Delta Air Lines network.

DL 877 arrived on time 78% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon84%(49 flights)
  • Tue84%(51 flights)
  • Wed77%(51 flights)
  • Thu75%(52 flights)
  • Fri77%(52 flights)
  • Sat77%(52 flights)
  • Sun71%(51 flights)
On-time by departure window
  • 12–3 PM81%(259 flights)
  • 3–6 PM70%(99 flights)
On-time trend by month
71%
May

Jun 76% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%29
July 202590%30
August 202594%31
September 202597%30
October 202577%31
November 202572%29
December 202537%30
January 202686%29
February 202679%28
March 202667%30
April 202687%30
May 202671%31
Departures on time
80%
Diverted
0.6%
Flights flown
358
Months covered
12

Same route, other flights

Keep nerding

Based on 363 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.