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Flight Reliability

DL 1541 · Delta Air Lines

Detroit → St. Louis (DTW–STL)95% of its flights flew this route. The rest (RSW–DTW) are included in these numbers.

77
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
10 min
Average arrival delay
1.2%
Cancelled
6 min early
Median arrival delay

Based on 328 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 1541 departing between 6–9 PM arrived on time 77% of the time, versus 44% between 3–6 PM.

Mondays have been rough.

DL 1541 arrived on time 85% of the time on Saturdays and just 68% on Mondays. That gap is worth planning around.

A bit behind the Delta Air Lines network.

DL 1541 arrived on time 76% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 1541 arrived on time 72% of the time over the last three months in the data, compared with 68% in the three months before that.

The breakdown

On-time by weekday
  • Mon68%(47 flights)
  • Tue81%(47 flights)
  • Wed80%(46 flights)
  • Thu76%(46 flights)
  • Fri69%(48 flights)
  • Sat85%(41 flights)
  • Sun71%(48 flights)
On-time by departure window
  • 3–6 PM44%(18 flights)
  • 6–9 PM77%(301 flights)
  • 9 PM–12 AM—(4 flights)
On-time trend by month
77%
May

Jun 80% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%30
July 202573%30
August 202586%22
September 2025100%20
October 202582%27
November 202579%19
December 202555%29
January 202666%29
February 202682%28
March 202669%29
April 202669%29
May 202677%31
Departures on time
76%
Diverted
0.3%
Flights flown
323
Months covered
12

Same route, other flights

Keep nerding

Based on 328 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.