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Flight Reliability

DL 300 · Delta Air Lines

Atlanta → Boston (ATL–BOS)

62
A Little Dicey
WanderNerd Reliability Score
67%
Arrive within 15 minutes
15 min
Average arrival delay
2.7%
Cancelled
1 min early
Median arrival delay

Based on 339 historical flights. Data through May 2026.

What the data says

Thursdays have been rough.

DL 300 arrived on time 75% of the time on Saturdays and just 60% on Thursdays. That gap is worth planning around.

Lagging the ATL–BOS route.

DL 300 arrived on time 67% of the time, versus 74% across the ATL–BOS route.

Lagging the Delta Air Lines network.

DL 300 arrived on time 67% of the time, versus 81% across the Delta Air Lines network.

Recent months have been rougher.

DL 300 arrived on time 66% of the time over the last three months in the data, compared with 74% in the three months before that.

The breakdown

On-time by weekday
  • Mon62%(45 flights)
  • Tue74%(49 flights)
  • Wed65%(49 flights)
  • Thu60%(47 flights)
  • Fri71%(45 flights)
  • Sat75%(48 flights)
  • Sun62%(47 flights)
On-time by departure window
  • 6–9 PM67%(328 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
73%
Apr

Jun 48% → Apr 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202539%28
August 202571%31
September 202573%30
October 202581%31
November 202567%30
December 202577%31
January 202679%28
February 202677%26
March 202647%30
April 202673%30
Departures on time
62%
Diverted
0%
Flights flown
330
Months covered
12

Same route, other flights

Keep nerding

Based on 339 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.