Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 3996 · Delta Air Lines

Washington → Minneapolis (IAD–MSP)

89
Pretty Reliable
WanderNerd Reliability Score
91%
Arrive within 15 minutes
6 min
Average arrival delay
2.0%
Cancelled
9 min early
Median arrival delay

Based on 253 historical flights. Data through May 2026.

What the data says

Wednesdays have been rough.

DL 3996 arrived on time 100% of the time on Thursdays and just 83% on Wednesdays. That gap is worth planning around.

A bit ahead of the IAD–MSP route.

DL 3996 arrived on time 91% of the time, versus 85% across the IAD–MSP route.

Better than the Delta Air Lines network average.

DL 3996 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.

Slipping a little lately.

DL 3996 arrived on time 89% of the time over the last three months in the data, compared with 94% in the three months before that.

The breakdown

On-time by weekday
  • Mon91%(34 flights)
  • Tue91%(35 flights)
  • Wed83%(36 flights)
  • Thu100%(35 flights)
  • Fri86%(36 flights)
  • Sat89%(36 flights)
  • Sun94%(35 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 202595%19
August 202583%30
September 2025100%10
December 2025100%12
January 202686%29
February 202696%27
March 202683%29
April 202693%30
May 202690%31
Departures on time
93%
Diverted
0.4%
Flights flown
247
Months covered
10

Same route, other flights

Keep nerding

Based on 253 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.