Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 5631 · Delta Air Lines

Indianapolis → Boston (IND–BOS)

95
Nerd Approved
WanderNerd Reliability Score
93%
Arrive within 15 minutes
12 min early
Average arrival delay
1.6%
Cancelled
18 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

Mondays have been rough.

DL 5631 arrived on time 98% of the time on Wednesdays and just 80% on Mondays. That gap is worth planning around.

Well ahead of the IND–BOS route.

DL 5631 arrived on time 93% of the time, versus 78% across the IND–BOS route.

Better than the Delta Air Lines network average.

DL 5631 arrived on time 93% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 5631 arrived on time 97% of the time over the last three months in the data, compared with 82% in the three months before that.

The breakdown

On-time by weekday
  • Mon80%(50 flights)
  • Tue92%(50 flights)
  • Wed98%(52 flights)
  • Thu96%(52 flights)
  • Fri92%(50 flights)
  • Sat94%(52 flights)
  • Sun98%(52 flights)
On-time by departure window
  • 6–9 AM93%(357 flights)
  • 9 AM–12 PM—(1 flights)
On-time trend by month
100%
May

Jun 93% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202597%30
August 202597%31
September 202597%30
October 2025100%31
November 202597%30
December 202577%31
January 202679%29
February 202689%26
March 202693%29
April 202697%30
May 2026100%31
Departures on time
96%
Diverted
0%
Flights flown
358
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.