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Flight Reliability

DL 456 · Delta Air Lines

Boston → Atlanta (BOS–ATL)

87
Pretty Reliable
WanderNerd Reliability Score
89%
Arrive within 15 minutes
1 min
Average arrival delay
2.2%
Cancelled
10 min early
Median arrival delay

Based on 359 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 90% of the time, against 85% between 9 AM–12 PM.

Sunday scaries are real for this one.

DL 456 arrived on time 98% of the time on Thursdays and just 83% on Sundays. That gap is worth planning around.

Better than the BOS–ATL route average.

DL 456 arrived on time 89% of the time, versus 79% across the BOS–ATL route.

Better than the Delta Air Lines network average.

DL 456 arrived on time 89% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon86%(49 flights)
  • Tue88%(49 flights)
  • Wed90%(52 flights)
  • Thu98%(52 flights)
  • Fri92%(51 flights)
  • Sat84%(44 flights)
  • Sun83%(53 flights)
On-time by departure window
  • 6–9 AM90%(268 flights)
  • 9 AM–12 PM85%(82 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 202584%31
August 202594%31
September 202590%30
October 202593%28
November 202596%28
December 202575%28
January 202679%28
February 202677%26
March 202693%30
April 202690%30
May 2026100%30
Departures on time
89%
Diverted
0.3%
Flights flown
350
Months covered
12

Same route, other flights

Keep nerding

Based on 359 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.