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Flight Reliability

DL 4175 · Delta Air Lines

MFE → Austin (MFE–AUS)85% of its flights flew this route. The rest (DTW–HSV, ATL–BTR) are included in these numbers.

99
Nerd Approved
WanderNerd Reliability Score
95%
Arrive within 15 minutes
7 min early
Average arrival delay
1.0%
Cancelled
15 min early
Median arrival delay

Based on 199 historical flights. Data through May 2026.

What the data says

6–9 PM has a slight edge.

Departures between 6–9 PM arrived on time 100% of the time, against 95% between 3–6 AM.

Mondays have been rough.

DL 4175 arrived on time 100% of the time on Fridays and just 85% on Mondays. That gap is worth planning around.

Better than the MFE–AUS route average.

DL 4175 arrived on time 95% of the time, versus 86% across the MFE–AUS route.

Better than the Delta Air Lines network average.

DL 4175 arrived on time 95% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon85%(26 flights)
  • Tue96%(26 flights)
  • Wed93%(28 flights)
  • Thu96%(28 flights)
  • Fri100%(28 flights)
  • Sat97%(33 flights)
  • Sun100%(28 flights)
On-time by departure window
  • 3–6 AM95%(168 flights)
  • 9 AM–12 PM—(4 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM100%(20 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
93%
May

Sep 100% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
September 2025100%18
December 202594%16
January 202694%31
February 202693%28
March 2026100%30
April 202697%30
May 202693%30
Departures on time
96%
Diverted
0%
Flights flown
197
Months covered
10

Same route, other flights

Keep nerding

Based on 199 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.