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Flight Reliability

DL 1156 · Delta Air Lines

Austin → Boston (AUS–BOS)87% of its flights flew this route. The rest (TYS–ATL, ATL–TYS) are included in these numbers.

48
Bring Snacks
WanderNerd Reliability Score
59%
Arrive within 15 minutes
34 min
Average arrival delay
1.4%
Cancelled
7 min
Median arrival delay

Based on 351 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 1156 departing between 6–9 PM arrived on time 79% of the time, versus 56% between 12–3 PM.

Sunday scaries are real for this one.

DL 1156 arrived on time 68% of the time on Saturdays and just 48% on Sundays. That gap is worth planning around.

A bit behind the AUS–BOS route.

DL 1156 arrived on time 59% of the time, versus 65% across the AUS–BOS route.

Well behind the Delta Air Lines network.

DL 1156 arrived on time 59% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon60%(53 flights)
  • Tue64%(47 flights)
  • Wed57%(47 flights)
  • Thu57%(53 flights)
  • Fri58%(55 flights)
  • Sat68%(38 flights)
  • Sun48%(52 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM56%(294 flights)
  • 3–6 PM65%(17 flights)
  • 6–9 PM79%(33 flights)
On-time trend by month
68%
May

Jun 60% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202559%29
August 202568%31
September 202527%30
October 202543%28
November 202565%26
December 202556%25
January 202673%26
February 202662%29
March 202674%31
April 202648%29
May 202668%31
Departures on time
60%
Diverted
0.3%
Flights flown
345
Months covered
12

Same route, other flights

Keep nerding

Based on 351 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.