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Flight Reliability

DL 549 · Delta Air Lines

Atlanta → Las Vegas (ATL–LAS)87% of its flights flew this route. The rest (LAS–ATL, ATL–SJC) are included in these numbers.

87
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
5 min
Average arrival delay
0.5%
Cancelled
4 min early
Median arrival delay

Based on 399 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 549 departing between 3–6 PM arrived on time 84% of the time, versus 74% between 9 AM–12 PM.

Skip Saturday if you can.

DL 549 arrived on time 90% of the time on Wednesdays. On Saturdays: 77%.

A bit ahead of the ATL–LAS route.

DL 549 arrived on time 81% of the time, versus 76% across the ATL–LAS route.

The breakdown

On-time by weekday
  • Mon83%(57 flights)
  • Tue77%(57 flights)
  • Wed90%(57 flights)
  • Thu86%(57 flights)
  • Fri79%(56 flights)
  • Sat77%(56 flights)
  • Sun77%(57 flights)
On-time by departure window
  • 9 AM–12 PM74%(61 flights)
  • 12–3 PM82%(286 flights)
  • 3–6 PM84%(50 flights)
On-time trend by month
84%
May

Jun 87% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202565%31
August 202581%31
September 202587%30
October 202571%31
November 202597%29
December 202597%30
January 202686%29
February 202668%28
March 202673%55
April 202686%42
May 202684%31
Departures on time
82%
Diverted
0%
Flights flown
397
Months covered
12

Same route, other flights

Keep nerding

Based on 399 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.