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Flight Reliability

DL 2557 · Delta Air Lines

Houston → Atlanta (HOU–ATL)

87
Pretty Reliable
WanderNerd Reliability Score
91%
Arrive within 15 minutes
1 min early
Average arrival delay
1.9%
Cancelled
8 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 2557 arrived on time 96% of the time on Thursdays. On Sundays: 88%.

Better than the HOU–ATL route average.

DL 2557 arrived on time 91% of the time, versus 80% across the HOU–ATL route.

Better than the Delta Air Lines network average.

DL 2557 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon88%(50 flights)
  • Tue88%(51 flights)
  • Wed92%(51 flights)
  • Thu96%(52 flights)
  • Fri94%(52 flights)
  • Sat90%(49 flights)
  • Sun88%(49 flights)
On-time by departure window
  • 3–6 AM91%(57 flights)
  • 6–9 AM91%(297 flights)
On-time trend by month
87%
May

Jun 96% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202596%28
July 2025100%31
August 202597%31
September 202590%30
October 202590%31
November 202583%30
December 202587%30
January 202683%29
February 202696%26
March 202689%27
April 202693%30
May 202687%31
Departures on time
92%
Diverted
1.1%
Flights flown
354
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.