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Flight Reliability

DL 3917 · Delta Air Lines

Detroit → FWA (DTW–FWA)

57
A Little Dicey
WanderNerd Reliability Score
65%
Arrive within 15 minutes
33 min
Average arrival delay
1.1%
Cancelled
1 min
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 3917 arrived on time 71% of the time on Thursdays and just 50% on Sundays. That gap is worth planning around.

A bit behind the DTW–FWA route.

DL 3917 arrived on time 65% of the time, versus 71% across the DTW–FWA route.

Well behind the Delta Air Lines network.

DL 3917 arrived on time 65% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 3917 arrived on time 72% of the time over the last three months in the data, compared with 55% in the three months before that.

The breakdown

On-time by weekday
  • Mon62%(52 flights)
  • Tue69%(52 flights)
  • Wed71%(51 flights)
  • Thu71%(52 flights)
  • Fri65%(51 flights)
  • Sat71%(51 flights)
  • Sun50%(52 flights)
On-time by departure window
  • 3–6 PM—(3 flights)
  • 6–9 PM65%(358 flights)
On-time trend by month
81%
May

Jun 53% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%30
July 202539%31
August 202558%31
September 202587%30
October 202587%31
November 202583%29
December 202536%31
January 202653%30
February 202675%28
March 202655%29
April 202680%30
May 202681%31
Departures on time
66%
Diverted
0%
Flights flown
361
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.